903.6 Warning Signs - Revision history

TaracksA at 18:09, 21 November 2025

2025-11-21T18:09:33Z

← Older revision		Revision as of 13:09, 21 November 2025
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	'''Option.''' Consistent with the provisions of the EPG, [https://epg.modot.org/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.60_Portable_Changeable_Message_Signs_.28MUTCD_6F.60.29 Changeable Message signs] may be used to display a warning message. Consistent with the provisions of [[903.2 Extent of Signing#903.2.17 Enhanced Conspicuity for Standard Signs (MUTCD Section 2A.15)\|EPG 903.2.17, a Warning Beacon]] may be used in combination with a standard warning sign.		'''Option.''' Consistent with the provisions of the EPG, [https://epg.modot.org/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.60_Portable_Changeable_Message_Signs_.28MUTCD_6F.60.29 Changeable Message signs] may be used to display a warning message. Consistent with the provisions of [[903.2 Extent of Signing#903.2.17 Enhanced Conspicuity for Standard Signs (MUTCD Section 2A.15)\|EPG 903.2.17, a Warning Beacon]] may be used in combination with a standard warning sign.

	'''Support.''' The categories of Warning signs are shown in Table 903.6.2. Warning signs provided in [[:Category:903 Highway Signing\|EPG 903]] cover most of the conditions that are likely to be encountered. Additional warning signs for temporary traffic control zones, school areas, grade crossings, and bicycle facilities are discussed in [[903.18 Signing for School Areas\|EPG 903.18 Signing for School Areas]], [[903.20 Signing for Rail and Light Rail Transit Grade Crossings\|EPG 903.20 Signing for Rail and Light Rail Transit Grade Crossings]], and [[903.21 Signing for Bicycle Facilities\|EPG 903.21 Signing for Bicycle Facilities]].		'''Support.''' The categories of Warning signs are shown in Table 903.6.2. Warning signs provided in [[:Category:903 Highway Signing (MUTCD Part 2)\|EPG 903]] cover most of the conditions that are likely to be encountered. Additional warning signs for temporary traffic control zones, school areas, grade crossings, and bicycle facilities are discussed in [[903.18 Signing for School Areas\|EPG 903.18 Signing for School Areas]], [[903.20 Signing for Rail and Light Rail Transit Grade Crossings\|EPG 903.20 Signing for Rail and Light Rail Transit Grade Crossings]], and [[903.21 Signing for Bicycle Facilities\|EPG 903.21 Signing for Bicycle Facilities]].

	'''Option.''' Word message warning signs other than those specified in this article may be developed and installed.		'''Option.''' Word message warning signs other than those specified in this article may be developed and installed.

TaracksA at 16:04, 13 November 2025

2025-11-13T16:04:36Z

← Older revision		Revision as of 11:04, 13 November 2025
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	[[Category:~~903 Highway Signing~~\|903.06]]		[[Category:Backup Removed Pages\|903.06]]

Hoskir: /* 903.6.11 Chevron Alignment Sign (W1-8) (MUTCD Section 2C.09) */ updated per RR3901

2024-11-21T18:15:12Z

903.6.11 Chevron Alignment Sign (W1-8) (MUTCD Section 2C.09): updated per RR3901

← Older revision		Revision as of 13:15, 21 November 2024
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	[[image:W1-8.gif\|center\|125px\|thumb\|<center>'''W1-8'''</center>]]		[[image:W1-8.gif\|center\|125px\|thumb\|<center>'''W1-8'''</center>]]

	~~[[image:Figure 903.6.11.1 2023.jpg\|right\|thumb\|450px\|<center>Figure 903.6.11.1 From Highway Safety & Traffic division Tracker</center>]]~~
	'''Support.''' Examples of when to use Chevron signs include locations where there is a crash history, evidence of drivers losing control on a curve or turn, a sharp change in alignment not readily visible to the driver, or as a systemic curve improvement program.		'''Support.''' Examples of when to use Chevron signs include locations where there is a crash history, evidence of drivers losing control on a curve or turn, a sharp change in alignment not readily visible to the driver, or as a systemic curve improvement program.

	The majority of fatal and serious injury crashes are attributed to lane departure crashes (State Strategic Highway Safety Plan). Chevrons are a highly cost-effective way to reduce lane departure crashes in curves and turns.		The majority of fatal and serious injury crashes are attributed to lane departure crashes (State Strategic Highway Safety Plan). Chevrons are a highly cost-effective way to reduce lane departure crashes in curves and turns.

	As of ~~January 1st, 2020, MoDOT was in substantial conformance with~~ the MUTCD in ~~regard to chevron installations~~. ~~Deploying chevrons on routes with 1~~,~~000 AADT or greater~~ on ~~curves where~~ the ~~difference between~~ the ~~advisory speed for~~ the ~~curve and~~ the ~~posted speed limit is 15 mph or greater~~. ~~Post deployment data is indicating a decreasing trend in roadway departure fatalities and serious injury crashes in horizontal curves as these~~ chevrons ~~were implemented as shown in [[media:Figure 903.6.11.1_2023.jpg\|Figure 903.6.11.1]] From~~ Highway Safety & Traffic Division ~~Tracker~~		Implementation of the 2009 MUTCD requirements for chevron deployments resulted in a statewide reduction in severe lane departure crashes in horizontal curves. To maintain this observed safety benefit, MoDOT has established standards based on the 2009 MUTCD criteria, which is above the minimum requirements in the 2023 edition of the MUTCD. For more details on the safety benefits of chevrons, contact the Highway Safety and Traffic Division.

	'''Standard.''' The use of the Chevron Alignment (W1-8 series) sign to provide additional emphasis and guidance for a change in horizontal alignment shall ~~match the minimum 2009 MUTCD standards, being~~ applied to roadways with 1,000 AADT or more, on curves ~~posted with an advisory speed of 35 mph or greater and~~ where the difference between the advisory speed for the curve and the posted speed limit for the roadway is 15 mph or greater.		'''Standard.''' The use of the Chevron Alignment (W1-8 series) sign to provide additional emphasis and guidance for a change in horizontal alignment shall be applied to roadways with 1,000 AADT or more, on curves where the difference between the advisory speed for the curve and the posted speed limit for the roadway is 15 mph or greater.

	The Chevron Alignment sign shall be a vertical rectangle. No border shall be used on the Chevron Alignment sign. If used, Chevron Alignment signs shall be installed on the outside of a turn or curve, in line with and at approximately a right angle to approaching traffic. Chevron Alignment signs shall be installed at a minimum height of 4 ~~ft.~~, measured vertically from the bottom of the sign to the elevation of the near edge of the traveled way. This will place the sign at approximately the driver’s eye height.		The Chevron Alignment sign shall be a vertical rectangle. No border shall be used on the Chevron Alignment sign. If used, Chevron Alignment signs shall be installed on the outside of a turn or curve, in line with and at approximately a right angle to approaching traffic. Chevron Alignment signs shall be installed at a minimum height of 4 feet, measured vertically from the bottom of the sign to the elevation of the near edge of the traveled way. This will place the sign at approximately the driver’s eye height.

	~~MoDOT’s systemic application of additional chevrons is above the minimum MUTCD standards and intended to further reduce the risk of severe run off road crashes~~. ~~These additional chevrons shall be installed gradually over time based~~ on ~~a district’s implementation plan. This systemic application of additional chevrons shall~~ be installed on roadways with 1,000 AADT or more, on curves posted with an advisory speed of 35 mph or greater and where the difference between the advisory speed for the curve and the posted speed limit for the roadway is a 10 mph or greater. For more details on MoDOT’s systemic countermeasure tools, contact the Highway Safety and Traffic Division.		Guidance. Based on engineering judgement, chevron alignment signs may be omitted within incorporated city limits.

	~~Horizontal~~ alignment ~~turns posted at 30 mph or less only require the installation of One-Directional Large Arrow~~ (~~W1-6~~) signs, ~~see [[#903~~.~~6.10 One-Direction Large Arrow Sign (W1-6) (MUTCD Section 2C.12)\|EPG 903.6.10]]~~.		As chevrons are installed, all horizontal alignment signing (chevrons, curve and turn signing, advisory speed plaques and arrow boards) on a corridor should be evaluated to assure their installations meet current standards. Aspects of existing horizontal alignment signs to look at can include spacing of existing chevrons, offset and mounting heights of any horizontal alignment sign as well as the distance advanced warning signs are installed from the curve/turn. The need for curve/turn signs could also be reevaluated if the ball banking these signs were installed under is out of date due to roadway/pavement improvements or simply the changes in vehicle performance.

	~~Guidance~~. ~~The time frame of the systemic implementation should coincide with district’s implementation plan~~.		'''Option.''' Chevron Alignment signs may also be used on any other roadways based on engineering judgment.

	~~The district implementation plan~~ may ~~include installing chevrons~~ in ~~several different methods~~, ~~including, but not limited to:~~		Chevron Alignment signs may be used instead of, or in addition to, the One-Direction Large Arrow (W1-6) sign on turns posted at 30 mph or less.
	~~:*Including~~ the ~~installation in a road resurfacing contract~~
	~~:*Bundling chevron installation into one~~ sign ~~installation contract following road resurfacing contracts within two fiscal years.~~
	~~:*Regional signing installation contract which install chevrons~~ at ~~an equal~~ or ~~greater rate as compared to road resurfacing contracts~~.

	~~Based on engineering judgement, chevron alignment signs~~ may be ~~omitted within incorporated city limits. If horizontal alignment guidance is still needed, other alternatives~~ to ~~chevrons may be installed, including, but not limited to delineators or~~ the ~~W1-2a Combination Horizontal~~ Alignment~~/Advisory Speed~~ signs.		LEDs may be used to enhance the conspicuity of Chevron Alignment signs in accordance with [[903.2_Extent_of_Signing#903.2.9_Retroreflectivity_and_Illumination_.28MUTCD_Section_2A.07.29\|EPG 903.2.9]].

	~~'''Option~~.~~''' Chevron Alignment signs may also be used on other roadways with less than or equal to 1,000 AADT based on engineering judgment~~.

	~~When used, Chevron Alignment signs may be used instead of or in addition to standard delineators on curves or to the One-Direction Large Arrow (W1-6) sign~~.

	Guidance. As chevrons are installed systemically, all horizontal alignment signing (chevrons, curve and turn signing, advisory speed plaques and arrow boards) on a corridor should be evaluated to assure their installations meet current standards. Aspects of existing horizontal alignment signs to look at can include spacing of existing chevrons, offset and mounting heights of any horizontal alignment sign as well as the distance advanced warning signs are installed from the curve/turn. The need for curve/turn signs could also be reevaluated if the ball banking these signs were installed under is out of date due to roadway/pavement improvements or simply the changes in vehicle performance.		'''Guidance.''' The approximate spacing of Chevron Alignment signs on the turn or curve measured from the point of curvature (PC) should be as shown in Table 903.6.11. The Chevron Alignment signs should be visible for a sufficient distance to provide the road user with adequate time to react to the change in alignment. In addition to the Chevron Alignment signs placed throughout the curve, there shall be one sign in advance of the PC and one after the PT. These signs shall be spaced the same as the Chevron Alignment signs in the curve.

	'''Guidance.''' The approximate spacing of Chevron Alignment signs on the turn or curve measured from the point of curvature (PC) should be as shown in Table 903.6.11. ~~If used,~~ Chevron Alignment signs should be visible for a sufficient distance to provide the road user with adequate time to react to the change in alignment. In addition to the Chevron Alignment signs placed throughout the curve, there shall be one sign in advance of the PC and one after the PT. These signs shall be spaced the same as the Chevron Alignment signs in the curve.

	Table 903.6.11 should be used for determining spacing. The values in Table 903.6.11 are typical and variances for driveways, public roads, and other signs may alter the spacing. Engineering judgment may also be used to modify the spacing as long as travelers always have at least two Chevron Alignment signs in view until the change in alignment eliminates the need for the signs.		Table 903.6.11 should be used for determining spacing. The values in Table 903.6.11 are typical and variances for driveways, public roads, and other signs may alter the spacing. Engineering judgment may also be used to modify the spacing as long as travelers always have at least two Chevron Alignment signs in view until the change in alignment eliminates the need for the signs.
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	The double-side Chevron (W1-8D) should be used on two-lane, two-way roads.		The double-side Chevron (W1-8D) should be used on two-lane, two-way roads.

	Chevron Alignment signs shall not be placed on the far side of a T-intersection facing traffic on the stem approach to warn drivers that a through movement is not physically possible, as this is the function of a Two-Direction (or One-Direction) Large Arrow sign ~~(W1-6 or W1-7)~~. Chevron Alignment signs shall not be used to mark obstructions within or adjacent to the roadway, including the beginning of guardrails or barriers, as this is the function of an object marker.		'''Standard.''' If used, the LEDs used in the Chevron Alignment sign shall consist of yellow LEDs outlining the chevron symbol.

			Chevron Alignment signs shall not be placed on the far side of a T-intersection facing traffic on the stem approach to warn drivers that a through movement is not physically possible, as this is the function of a Two-Direction (or One-Direction) Large Arrow sign. Chevron Alignment signs shall not be used to mark obstructions within or adjacent to the roadway, including the beginning of guardrails or barriers, as this is the function of an object marker.

			Chevron Alignment signs directing traffic to the right shall not be used in the central island of a roundabout or a neighborhood traffic circle.

	===<center>Table 903.6.11 Typical Spacing of Chevron Alignment Signs on Horizontal Curves===		===<center>Table 903.6.11 Typical Spacing of Chevron Alignment Signs on Horizontal Curves===
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	\|More than 60 mph \|\|140 feet		\|More than 60 mph \|\|140 feet
	\|}		\|}

	</center>		</center>

Hoskir: /* 903.6.58 NOTICE Plaque (W16-18P) (MUTCD Section 2A.15) */ updated per RR3865

2024-04-08T12:41:30Z

903.6.58 NOTICE Plaque (W16-18P) (MUTCD Section 2A.15): updated per RR3865

← Older revision		Revision as of 07:41, 8 April 2024
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	'''Guidance:''' The use of the NOTICE (W16-18P) plaque should be based on engineering judgment and not systematically applied to a specific sign unless otherwise specified in the EPG.		'''Guidance:''' The use of the NOTICE (W16-18P) plaque should be based on engineering judgment and not systematically applied to a specific sign unless otherwise specified in the EPG.

			[[image:903.6.jpg\|center\|775px]]

			==903.6.59 Vehicle Speed Feedback Plaque (W13-20aP) ([https://mutcd.fhwa.dot.gov/ MUTCD] Section 2c.13)==
			<gallery mode="nolines" class="center" heights=175px>
			file:W13-20aP.png\|'''W13-20aP'''
			</gallery>
			'''Option:''' A Vehicle Speed Feedback (W13-20aP) plaque that displays the speed of an approaching vehicle to the vehicle operator may be used to provide warning to drivers of their speed in relation to a speed limit sign.

			'''Standard:''' When used to display the speed of an approaching vehicle in relation to the posted speed limit, the Vehicle Speed Feedback (W13-20aP) plaque shall be mounted below a Speed Limit (R2-1) sign. The speed limit sign shall be a minimum of 30”x36” on conventional roads and a minimum of 36”x48” on freeways and expressways. The Vehicle Speed Feedback assembly shall not be installed at a location where the posted speed limit on the route changes. Vehicle Speed Feedback assemblies shall be placed anywhere downstream of a speed limit change but shall be a minimum of 200 feet down stream of a speed limit change on conventional routes and a minimum of 400 feet down stream of a speed limit change on expressways of freeways. Vehicle Speed Feedback assemblies shall be installed in accordance with the [https://epg.modot.org/forms/general_files/TS/TA_Your_Speed_Feedback_Assembly.pdf Vehicle Speed Feedback Assembly Typical Application].

			The legend YOUR SPEED shall be a black legend on a yellow retroreflective background with the YOUR SPEED text on one line. The changeable legend displaying the speed of the approaching vehicle shall be a yellow luminous legend on a black opaque background. The vehicle speed displayed on the changeable portion of the sign shall be displayed as an integer. The Vehicle Speed Feedback sign and plaque shall not flash, strobe, change color, or use other animated elements integrated into the changeable legend display. When no vehicles are approaching, the changeable display shall not display a legend.

			No Speed Sign shall have the capability to collect, store or transmit data of any type.

			'''Guidance:''' The changeable portion of the Vehicle Speed Feedback legend should be approximately the same height, width, and stroke of those on the Speed Limit sign it supplements or is mounted below.

			The W13-20aP should be approximately the same width of the Speed Limit sign it is mounted below.


	~~[[image:903.6.jpg\|center\|775px]]~~
	[[Category:903 Highway Signing\|903.06]]		[[Category:903 Highway Signing\|903.06]]

Hoskir: /* 903.6.11 Chevron Alignment Sign (W1-8) (MUTCD Section 2C.09) */ updated per RR 3609

2023-01-10T17:19:17Z

903.6.11 Chevron Alignment Sign (W1-8) (MUTCD Section 2C.09): updated per RR 3609

← Older revision		Revision as of 12:19, 10 January 2023
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	[[image:W1-8.gif\|center\|125px\|thumb\|<center>'''W1-8'''</center>]]		[[image:W1-8.gif\|center\|125px\|thumb\|<center>'''W1-8'''</center>]]

	'''Support.''' Examples of when to use Chevron signs include locations where there is a crash history, evidence of drivers losing control on a curve or turn, a sharp change in alignment not readily visible to the driver, or as a systemic curve improvement program.		[[image:Figure 903.6.11.1 2023.jpg\|right\|thumb\|450px\|<center>Figure 903.6.11.1 From Highway Safety & Traffic division Tracker</center>]]
			'''Support.''' Examples of when to use Chevron signs include locations where there is a crash history, evidence of drivers losing control on a curve or turn, a sharp change in alignment not readily visible to the driver, or as a systemic curve improvement program.

	The majority of fatal and serious injury crashes are attributed to lane departure crashes (State Strategic Highway Safety Plan). Chevrons are a highly cost-effective way to reduce lane departure crashes in curves and turns.		The majority of fatal and serious injury crashes are attributed to lane departure crashes (State Strategic Highway Safety Plan). Chevrons are a highly cost-effective way to reduce lane departure crashes in curves and turns.

	As of January 1st, 2020, MoDOT was in substantial conformance with the MUTCD in regard to chevron installations.		As of January 1st, 2020, MoDOT was in substantial conformance with the MUTCD in regard to chevron installations. Deploying chevrons on routes with 1,000 AADT or greater on curves where the difference between the advisory speed for the curve and the posted speed limit is 15 mph or greater. Post deployment data is indicating a decreasing trend in roadway departure fatalities and serious injury crashes in horizontal curves as these chevrons were implemented as shown in [[media:Figure 903.6.11.1_2023.jpg\|Figure 903.6.11.1]] From Highway Safety & Traffic Division Tracker

	'''Standard.''' The use of the Chevron Alignment (W1-8 series) sign to provide additional emphasis and guidance for a change in horizontal alignment shall ~~be used on~~ roadways with ~~more than~~ 1,000 AADT.		'''Standard.''' The use of the Chevron Alignment (W1-8 series) sign to provide additional emphasis and guidance for a change in horizontal alignment shall match the minimum 2009 MUTCD standards, being applied to roadways with 1,000 AADT or more, on curves posted with an advisory speed of 35 mph or greater and where the difference between the advisory speed for the curve and the posted speed limit for the roadway is 15 mph or greater.

	The Chevron Alignment sign shall be a vertical rectangle. No border shall be used on the Chevron Alignment sign. If used, Chevron Alignment signs shall be installed on the outside of a turn or curve, in line with and at approximately a right angle to approaching traffic. Chevron Alignment signs shall be installed at a minimum height of 4 ft., measured vertically from the bottom of the sign to the elevation of the near edge of the traveled way. This will place the sign at approximately the driver’s eye height.		The Chevron Alignment sign shall be a vertical rectangle. No border shall be used on the Chevron Alignment sign. If used, Chevron Alignment signs shall be installed on the outside of a turn or curve, in line with and at approximately a right angle to approaching traffic. Chevron Alignment signs shall be installed at a minimum height of 4 ft., measured vertically from the bottom of the sign to the elevation of the near edge of the traveled way. This will place the sign at approximately the driver’s eye height.

	~~Chevron Alignment signs~~ shall be ~~placed~~ on ~~all~~ curves posted at 35 mph or greater where ~~there is a 5 mph or more~~ difference between the ~~posted~~ speed ~~limit~~ and the ~~advisory~~ speed ~~plaque~~ for ~~that curve on roadways with an AADT of 1,000 or more. The application of chevrons above~~ the ~~MUTCD minimum requirements, which~~ is 15 mph ~~difference in posted speed and advisory on roadways AADT of 1,000~~ or more, ~~is due to~~ the increased risk of severe run off road crashes on these curves. The chevron installations above MUTCD minimums are to be predominately addressed through STIP projects that are applied to a given route.		MoDOT’s systemic application of additional chevrons is above the minimum MUTCD standards and intended to further reduce the risk of severe run off road crashes. These additional chevrons shall be installed gradually over time based on a district’s implementation plan. This systemic application of additional chevrons shall be installed on roadways with 1,000 AADT or more, on curves posted with an advisory speed of 35 mph or greater and where the difference between the advisory speed for the curve and the posted speed limit for the roadway is a 10 mph or greater. For more details on MoDOT’s systemic countermeasure tools, contact the Highway Safety and Traffic Division.

	Horizontal alignment turns posted at 30 mph or less only require the installation of One-Directional Large Arrow (W1-6) signs, see [[#903.6.10 One-Direction Large Arrow Sign (W1-6) (MUTCD Section 2C.12)\|EPG 903.6.10]].		Horizontal alignment turns posted at 30 mph or less only require the installation of One-Directional Large Arrow (W1-6) signs, see [[#903.6.10 One-Direction Large Arrow Sign (W1-6) (MUTCD Section 2C.12)\|EPG 903.6.10]].

	~~'''Option~~.~~''' Chevron Alignment signs may also be used on other roadways~~ with ~~less than or equal to 1,000 AADT based on engineering judgment~~.		Guidance. The time frame of the systemic implementation should coincide with district’s implementation plan.

	~~When used, Chevron Alignment signs~~ may ~~be used instead of or~~ in ~~addition~~ to ~~standard delineators on curves~~ or to ~~the One-Direction Large Arrow (W1-6) sign~~.		The district implementation plan may include installing chevrons in several different methods, including, but not limited to:
			:*Including the installation in a road resurfacing contract
			:*Bundling chevron installation into one sign installation contract following road resurfacing contracts within two fiscal years.
			:*Regional signing installation contract which install chevrons at an equal or greater rate as compared to road resurfacing contracts.

	~~'''Guidance.''' The approximate spacing of Chevron Alignment~~ signs ~~on the turn or curve measured from the point of curvature (PC) should~~ be ~~as shown in Table 903.6.11~~. If ~~used~~, ~~Chevron Alignment signs should~~ be ~~visible for a sufficient distance to provide the road user with adequate time to react to the change in alignment. In addition~~ to the ~~Chevron~~ Alignment signs ~~placed throughout the curve, there shall be one sign in advance of the PC and one after the PT. These signs shall be spaced the same as the Chevron Alignment signs in the curve~~.		Based on engineering judgement, chevron alignment signs may be omitted within incorporated city limits. If horizontal alignment guidance is still needed, other alternatives to chevrons may be installed, including, but not limited to delineators or the W1-2a Combination Horizontal Alignment/Advisory Speed signs.

	~~Table 903~~.~~6.11 should be used for determining spacing. The values in Table 903.6.11 are typical and variances for driveways, public roads, and other~~ signs ~~may alter the spacing. Engineering judgment~~ may also be used to ~~modify the spacing as long as travelers always have at least two Chevron Alignment signs in view until the change in alignment eliminates the need for the signs~~.		'''Option.''' Chevron Alignment signs may also be used on other roadways with less than or equal to 1,000 AADT based on engineering judgment.

	~~At the end~~ of ~~a divided highway, where~~ the ~~traffic reduces to two lanes~~, chevrons should be ~~used~~ to ~~direct traffic~~ from the ~~dual lanes that are ending and being redirected~~ to the ~~two-lane roadway~~.		When used, Chevron Alignment signs may be used instead of or in addition to standard delineators on curves or to the One-Direction Large Arrow (W1-6) sign.

			Guidance. As chevrons are installed systemically, all horizontal alignment signing (chevrons, curve and turn signing, advisory speed plaques and arrow boards) on a corridor should be evaluated to assure their installations meet current standards. Aspects of existing horizontal alignment signs to look at can include spacing of existing chevrons, offset and mounting heights of any horizontal alignment sign as well as the distance advanced warning signs are installed from the curve/turn. The need for curve/turn signs could also be reevaluated if the ball banking these signs were installed under is out of date due to roadway/pavement improvements or simply the changes in vehicle performance.

	The ~~single-sided~~ Chevron ~~sign side~~ should ~~only~~ be used ~~where only~~ one ~~direction~~ of ~~travel is impacted, such~~ as ~~on an expressway~~.		'''Guidance.''' The approximate spacing of Chevron Alignment signs on the turn or curve measured from the point of curvature (PC) should be as shown in Table 903.6.11. If used, Chevron Alignment signs should be visible for a sufficient distance to provide the road user with adequate time to react to the change in alignment. In addition to the Chevron Alignment signs placed throughout the curve, there shall be one sign in advance of the PC and one after the PT. These signs shall be spaced the same as the Chevron Alignment signs in the curve.

	The double-side Chevron (W1-8D) should be used on two-lane, two-way roads.		Table 903.6.11 should be used for determining spacing. The values in Table 903.6.11 are typical and variances for driveways, public roads, and other signs may alter the spacing. Engineering judgment may also be used to modify the spacing as long as travelers always have at least two Chevron Alignment signs in view until the change in alignment eliminates the need for the signs.

			At the end of a divided highway, where the traffic reduces to two lanes, chevrons should be used to direct traffic from the dual lanes that are ending and being redirected to the two-lane roadway.

			The single-sided Chevron sign side should only be used where only one direction of travel is impacted, such as on an expressway.

			The double-side Chevron (W1-8D) should be used on two-lane, two-way roads.

	Chevron Alignment signs shall not be placed on the far side of a T-intersection facing traffic on the stem approach to warn drivers that a through movement is not physically possible, as this is the function of a Two-Direction (or One-Direction) Large Arrow sign (W1-6 or W1-7). Chevron Alignment signs shall not be used to mark obstructions within or adjacent to the roadway, including the beginning of guardrails or barriers, as this is the function of an object marker.		Chevron Alignment signs shall not be placed on the far side of a T-intersection facing traffic on the stem approach to warn drivers that a through movement is not physically possible, as this is the function of a Two-Direction (or One-Direction) Large Arrow sign (W1-6 or W1-7). Chevron Alignment signs shall not be used to mark obstructions within or adjacent to the roadway, including the beginning of guardrails or barriers, as this is the function of an object marker.

Smithk: Updated website links for increased security

2021-10-26T20:08:25Z

Updated website links for increased security

Smithk: updated links

2020-11-18T16:28:21Z

updated links

← Older revision		Revision as of 11:28, 18 November 2020
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	'''Option.''' Consistent with the provisions of the EPG, [http://epg.modot.mo.gov/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.60_Portable_Changeable_Message_Signs_.28MUTCD_6F.60.29 Changeable Message signs] may be used to display a warning message. Consistent with the provisions of [[903.2 Extent of Signing#903.2.17 Enhanced Conspicuity for Standard Signs (MUTCD Section 2A.15)\|EPG 903.2.17, a Warning Beacon]] may be used in combination with a standard warning sign.		'''Option.''' Consistent with the provisions of the EPG, [http://epg.modot.mo.gov/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.60_Portable_Changeable_Message_Signs_.28MUTCD_6F.60.29 Changeable Message signs] may be used to display a warning message. Consistent with the provisions of [[903.2 Extent of Signing#903.2.17 Enhanced Conspicuity for Standard Signs (MUTCD Section 2A.15)\|EPG 903.2.17, a Warning Beacon]] may be used in combination with a standard warning sign.

	'''Support.''' The categories of Warning signs are shown in Table 903.6.2. Warning signs provided in [[:Category:903 Highway Signing\|EPG 903]] cover most of the conditions that are likely to be encountered. Additional warning signs for temporary traffic control zones, school areas, grade crossings, and bicycle facilities are discussed in [[903.19 Signing for School Areas\|EPG 903.19 Signing for School Areas]], [[903.20 Signing for Rail and Light Rail Transit Grade Crossings\|EPG 903.20 Signing for Rail and Light Rail Transit Grade Crossings]], and [[903.21 Signing for Bicycle Facilities\|EPG 903.21 Signing for Bicycle Facilities]].		'''Support.''' The categories of Warning signs are shown in Table 903.6.2. Warning signs provided in [[:Category:903 Highway Signing\|EPG 903]] cover most of the conditions that are likely to be encountered. Additional warning signs for temporary traffic control zones, school areas, grade crossings, and bicycle facilities are discussed in [[903.18 Signing for School Areas\|EPG 903.18 Signing for School Areas]], [[903.20 Signing for Rail and Light Rail Transit Grade Crossings\|EPG 903.20 Signing for Rail and Light Rail Transit Grade Crossings]], and [[903.21 Signing for Bicycle Facilities\|EPG 903.21 Signing for Bicycle Facilities]].

	'''Option.''' Word message warning signs other than those specified in this article may be developed and installed.		'''Option.''' Word message warning signs other than those specified in this article may be developed and installed.
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	'''Option.''' A warning sign that is larger than the size shown in the Oversized column in Table 903.6.3 for that particular sign may be diamond-shaped or may be rectangular or square in shape. Warning signs regarding conditions associated with pedestrians, bicyclists and playgrounds may have a black legend and border on a fluorescent yellow background.		'''Option.''' A warning sign that is larger than the size shown in the Oversized column in Table 903.6.3 for that particular sign may be diamond-shaped or may be rectangular or square in shape. Warning signs regarding conditions associated with pedestrians, bicyclists and playgrounds may have a black legend and border on a fluorescent yellow background.

	'''Standard.''' Warning signs regarding conditions associated with school buses and schools and their related supplemental plaques shall have a black legend and border on a fluorescent yellow-green background (see [[903.19 Signing for School Areas#903.19.9 School Zone Sign (S1-1) and Plaques (S4-3P) and END SCHOOL ZONE Sign (S5-2) (MUTCD Section 7B.09)\|EPG 903.19.9]]).		'''Standard.''' Warning signs regarding conditions associated with school buses and schools and their related supplemental plaques shall have a black legend and border on a fluorescent yellow-green background (see [[903.18 Signing for School Areas#903.18.9 School Zone Sign (S1-1) and Plaques (S4-3P) and END SCHOOL ZONE Sign (S5-2) (MUTCD Section 7B.09)\|EPG 903.18.9]]).

	====<center>Table 903.6.3 Warning Sign and Plaque Sizes</center>====		====<center>Table 903.6.3 Warning Sign and Plaque Sizes</center>====

Smithk: /* 903.6.20 Double Arrow Sign (W12-1) (MUTCD Section 2C.25) */

2020-11-13T20:44:57Z

903.6.20 Double Arrow Sign (W12-1) (MUTCD Section 2C.25)

← Older revision		Revision as of 15:44, 13 November 2020
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	[[image:903.6.20.jpg\|center\|500px\|thumb\|<center>'''Fig. 903.6.20 Installation For Double Down Arrow Sign'''</center>		[[image:903.6.20.jpg\|center\|500px\|thumb\|<center>'''Fig. 903.6.20 Installation For Double Down Arrow Sign'''</center>
	'''Note:''' The Type 1 Object Marker may be added to this installation if additional emphasis is required, except at signalized intersections. See [[903.17 ~~Other Signing Items~~#903.17.2 Object Marker Design and Placement Height (MUTCD Section 2C.63)\|EPG 903.17.2 Object Marker Design and Placement Height]] for mounting height of Type 1 Object Marker.]]		'''Note:''' The Type 1 Object Marker may be added to this installation if additional emphasis is required, except at signalized intersections. See [[903.17 Delineation and Object Markers#903.17.2 Object Marker Design and Placement Height (MUTCD Section 2C.63)\|EPG 903.17.2 Object Marker Design and Placement Height]] for mounting height of Type 1 Object Marker.]]

	==903.6.21 DEAD END, NO OUTLET, and ROAD ENDS Signs (W14-1, W14-2, W14-13) ([https://mutcd.fhwa.dot.gov/ MUTCD] Section 2C.26)==		==903.6.21 DEAD END, NO OUTLET, and ROAD ENDS Signs (W14-1, W14-2, W14-13) ([https://mutcd.fhwa.dot.gov/ MUTCD] Section 2C.26)==

Smithk: updated link

2020-11-13T20:39:36Z

updated link

← Older revision		Revision as of 15:39, 13 November 2020
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	[[image:903.6.20.jpg\|center\|500px\|thumb\|<center>'''Fig. 903.6.20 Installation For Double Down Arrow Sign'''</center>		[[image:903.6.20.jpg\|center\|500px\|thumb\|<center>'''Fig. 903.6.20 Installation For Double Down Arrow Sign'''</center>
	'''Note:''' The Type 1 Object Marker may be added to this installation if additional emphasis is required, except at signalized intersections. See [[903.18 Other Signing Items#903.18.2 Object Marker Design and Placement Height (MUTCD Section 2C.63)\|EPG 903.18.2 Object Marker Design and Placement Height]] for mounting height of Type 1 Object Marker.]]		'''Note:''' The Type 1 Object Marker may be added to this installation if additional emphasis is required, except at signalized intersections. See [[903.17 Other Signing Items#903.17.2 Object Marker Design and Placement Height (MUTCD Section 2C.63)\|EPG 903.17.2 Object Marker Design and Placement Height]] for mounting height of Type 1 Object Marker.]]

	==903.6.21 DEAD END, NO OUTLET, and ROAD ENDS Signs (W14-1, W14-2, W14-13) ([https://mutcd.fhwa.dot.gov/ MUTCD] Section 2C.26)==		==903.6.21 DEAD END, NO OUTLET, and ROAD ENDS Signs (W14-1, W14-2, W14-13) ([https://mutcd.fhwa.dot.gov/ MUTCD] Section 2C.26)==

Smithk: Per TS, numerous minor clarifications

2020-09-25T19:41:26Z

Per TS, numerous minor clarifications

Show changes

← Older revision		Revision as of 15:08, 26 October 2021
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	'''Guidance.''' The use of warning signs should be kept to a minimum as the unnecessary use of warning signs tends to increase disrespect for all signs. In situations where the condition or activity is seasonal or temporary, the warning sign should be removed or covered when the condition or activity does not exist.		'''Guidance.''' The use of warning signs should be kept to a minimum as the unnecessary use of warning signs tends to increase disrespect for all signs. In situations where the condition or activity is seasonal or temporary, the warning sign should be removed or covered when the condition or activity does not exist.

	'''Option.''' Consistent with the provisions of the EPG, [~~http~~://epg.modot.~~mo.gov~~/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.60_Portable_Changeable_Message_Signs_.28MUTCD_6F.60.29 Changeable Message signs] may be used to display a warning message. Consistent with the provisions of [[903.2 Extent of Signing#903.2.17 Enhanced Conspicuity for Standard Signs (MUTCD Section 2A.15)\|EPG 903.2.17, a Warning Beacon]] may be used in combination with a standard warning sign.		'''Option.''' Consistent with the provisions of the EPG, [https://epg.modot.org/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.60_Portable_Changeable_Message_Signs_.28MUTCD_6F.60.29 Changeable Message signs] may be used to display a warning message. Consistent with the provisions of [[903.2 Extent of Signing#903.2.17 Enhanced Conspicuity for Standard Signs (MUTCD Section 2A.15)\|EPG 903.2.17, a Warning Beacon]] may be used in combination with a standard warning sign.

	'''Support.''' The categories of Warning signs are shown in Table 903.6.2. Warning signs provided in [[:Category:903 Highway Signing\|EPG 903]] cover most of the conditions that are likely to be encountered. Additional warning signs for temporary traffic control zones, school areas, grade crossings, and bicycle facilities are discussed in [[903.18 Signing for School Areas\|EPG 903.18 Signing for School Areas]], [[903.20 Signing for Rail and Light Rail Transit Grade Crossings\|EPG 903.20 Signing for Rail and Light Rail Transit Grade Crossings]], and [[903.21 Signing for Bicycle Facilities\|EPG 903.21 Signing for Bicycle Facilities]].		'''Support.''' The categories of Warning signs are shown in Table 903.6.2. Warning signs provided in [[:Category:903 Highway Signing\|EPG 903]] cover most of the conditions that are likely to be encountered. Additional warning signs for temporary traffic control zones, school areas, grade crossings, and bicycle facilities are discussed in [[903.18 Signing for School Areas\|EPG 903.18 Signing for School Areas]], [[903.20 Signing for Rail and Light Rail Transit Grade Crossings\|EPG 903.20 Signing for Rail and Light Rail Transit Grade Crossings]], and [[903.21 Signing for Bicycle Facilities\|EPG 903.21 Signing for Bicycle Facilities]].
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	'''Guidance.''' Vehicular Traffic Warning signs should be used only at locations where the road user’s sight distance is restricted, or the condition, activity, or entering traffic would be unexpected. If the condition or activity is seasonal or temporary, the Vehicular Traffic Warning sign should be removed or covered when the condition or activity does not exist.		'''Guidance.''' Vehicular Traffic Warning signs should be used only at locations where the road user’s sight distance is restricted, or the condition, activity, or entering traffic would be unexpected. If the condition or activity is seasonal or temporary, the Vehicular Traffic Warning sign should be removed or covered when the condition or activity does not exist.

	Haul routes that are sporadic should use the portable or turnable Truck Crossing installations and have a contract for Signs at Truck Crossings (TR12) executed. The [~~http~~://epg.modot.org/index.php/903.16_Signing_Agreements#903.16.2_TR-12_contract_for_Signs_at_Truck_Crossing TR12 Agreement] can be found in [http://sp/sites/eagreements/SitePages/Home.aspx eAgreements].		Haul routes that are sporadic should use the portable or turnable Truck Crossing installations and have a contract for Signs at Truck Crossings (TR12) executed. The [https://epg.modot.org/index.php/903.16_Signing_Agreements#903.16.2_TR-12_contract_for_Signs_at_Truck_Crossing TR12 Agreement] can be found in [http://sp/sites/eagreements/SitePages/Home.aspx eAgreements].

	When the HORSE DRAWN VEHICLE sign (W11-14) or the BICYLE sign (W11-1) is used to notify motorists of these vehicles traveling along a roadway, the Share the Road supplemental plaque (W16-1P) should be installed below the sign and be repeated in accordance with the [[#903.6.50 SHARE THE ROAD Supplemental Plaque (W16-1P) (MUTCD Section 2C.60)\|Share the Road sign guidance]].		When the HORSE DRAWN VEHICLE sign (W11-14) or the BICYLE sign (W11-1) is used to notify motorists of these vehicles traveling along a roadway, the Share the Road supplemental plaque (W16-1P) should be installed below the sign and be repeated in accordance with the [[#903.6.50 SHARE THE ROAD Supplemental Plaque (W16-1P) (MUTCD Section 2C.60)\|Share the Road sign guidance]].
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	If a post-mounted W11-2 or W11-7 sign is placed at the location of the crossing point where pedestrians or equestrians might be crossing the roadway, a diagonal downward pointing arrow (W16-7P) plaque shall be mounted below the sign. If the W11-2 or W11-7 sign is mounted overhead, the W16-7P plaque shall not be used.		If a post-mounted W11-2 or W11-7 sign is placed at the location of the crossing point where pedestrians or equestrians might be crossing the roadway, a diagonal downward pointing arrow (W16-7P) plaque shall be mounted below the sign. If the W11-2 or W11-7 sign is mounted overhead, the W16-7P plaque shall not be used.

	The Cattle (W11-4) sign shall be issued to an individual only when the Application for Sign at Cattle Crossings contract (TR09) is fully executed. The [~~http~~://epg.modot.org/index.php/903.16_Signing_Agreements#903.16.1_TR-09_Contract_for_Signs_at_Cattle_Crossing TR09 Agreement] can be found in [http://sp/sites/eagreements/SitePages/Home.aspx eAgreements].		The Cattle (W11-4) sign shall be issued to an individual only when the Application for Sign at Cattle Crossings contract (TR09) is fully executed. The [https://epg.modot.org/index.php/903.16_Signing_Agreements#903.16.1_TR-09_Contract_for_Signs_at_Cattle_Crossing TR09 Agreement] can be found in [http://sp/sites/eagreements/SitePages/Home.aspx eAgreements].

	'''Option.''' Supplemented plaques with the legend AHEAD or XX FEET may be displayed below crossing signs to inform road users that they are approaching a point where crossing activity might occur.		'''Option.''' Supplemented plaques with the legend AHEAD or XX FEET may be displayed below crossing signs to inform road users that they are approaching a point where crossing activity might occur.
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	If the location for placement of an advance warning sign for a curve, turn, paved road, stop condition or other condition deemed appropriate falls on state-maintained right of way, MoDOT will place and maintain the traffic control device on state-maintained right of way at the request of the local traffic authority.		If the location for placement of an advance warning sign for a curve, turn, paved road, stop condition or other condition deemed appropriate falls on state-maintained right of way, MoDOT will place and maintain the traffic control device on state-maintained right of way at the request of the local traffic authority.

	'''Standard.''' The placement of all traffic control devices on the state highway system shall be governed by the [~~http~~://epg.modot.org/index.php/Main_Page ''Engineering Policy Guide'']. MoDOT is responsible for the placement and maintenance of all signs on state-maintained right of way.		'''Standard.''' The placement of all traffic control devices on the state highway system shall be governed by the [https://epg.modot.org/index.php/Main_Page ''Engineering Policy Guide'']. MoDOT is responsible for the placement and maintenance of all signs on state-maintained right of way.

	==903.6.56 Passing Lane Warning Signs (W6-6a, W6-6aP, W6-16, W6-17)==		==903.6.56 Passing Lane Warning Signs (W6-6a, W6-6aP, W6-16, W6-17)==