Category:949 Other Aspects of Traffic - Revision history

Smithk: Per TS, info clarified and moved to EPG 905.2

2021-04-27T19:34:58Z

Per TS, info clarified and moved to EPG 905.2

← Older revision		Revision as of 14:34, 27 April 2021
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	~~[[image:949.jpg\|right\|600px]]~~
	~~This article collects a number of topics including:~~

	- [[~~949~~.1 Voiding City Ordinances on State Routes with Inappropriate Speed Limits\|~~949~~.1 Voiding City Ordinances on State Routes with Inappropriate Speed Limits]]		{\|style="padding: 0.3em; margin-left:15px; border:2px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="340px" align="center"
			\|-
	- [[~~949~~.2 Speed Limit Guidelines\|~~949~~.2 Speed Limit Guidelines]]		\|'''This article has moved'''
			\|-
			\|In April 2021, the content of EPG 949.1 Voiding City Ordinances on State Routes with Inappropriate Speed Limits was clarified and moved to [[905.2 Traffic Studies#905.2.13 Voiding City Ordinances on State Routes with Inappropriate Speed Limits\|EPG 905.2.13 Voiding City Ordinances on State Routes with Inappropriate Speed Limits]]. The content of EPG 949.2 Speed Limit Guidelines was moved to [[905.2 Traffic Studies#905.2.14 Speed Limit Guidelines\|EPG 905.2.14 Speed Limit Guidelines]].
			\|}

Smithk: Per TS, EPG 949.3 Local Exchange of Transportation Services (LETS) was deleted

2020-11-16T20:56:09Z

Per TS, EPG 949.3 Local Exchange of Transportation Services (LETS) was deleted

← Older revision		Revision as of 15:56, 16 November 2020
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	- [[949.2 Speed Limit Guidelines\|949.2 Speed Limit Guidelines]]		- [[949.2 Speed Limit Guidelines\|949.2 Speed Limit Guidelines]]

	~~- [[949.3 Local Exchange of Transportation Services (LETS)\|949.3 Local Exchange of Transportation Services (LETS)]]~~

Smithk: updated link to EPG 949.2

2010-02-11T21:36:27Z

updated link to EPG 949.2

← Older revision		Revision as of 16:36, 11 February 2010
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	- [[949.1 Voiding City Ordinances on State Routes with Inappropriate Speed Limits\|949.1 Voiding City Ordinances on State Routes with Inappropriate Speed Limits]]		- [[949.1 Voiding City Ordinances on State Routes with Inappropriate Speed Limits\|949.1 Voiding City Ordinances on State Routes with Inappropriate Speed Limits]]

	- [[949.2 ~~Prevailing~~ Speed ~~Determination~~\|949.2 ~~Prevailing~~ Speed ~~Determination~~]]		- [[949.2 Speed Limit Guidelines\|949.2 Speed Limit Guidelines]]

	- [[949.3 Local Exchange of Transportation Services (LETS)\|949.3 Local Exchange of Transportation Services (LETS)]]		- [[949.3 Local Exchange of Transportation Services (LETS)\|949.3 Local Exchange of Transportation Services (LETS)]]

Smithk: moved 949.3 to its own page

2007-10-18T14:27:09Z

moved 949.3 to its own page

Show changes

Smithk: article construction - moving portions of the article to their own pages

2007-10-18T14:22:37Z

article construction - moving portions of the article to their own pages

← Older revision		Revision as of 09:22, 18 October 2007
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	[[image:949.jpg\|~~center~~\|~~750px~~]]		[[image:949.jpg\|right\|600px]]
			This article collects a number of topics including:

	==949.1 Voiding City Ordinances on State Routes with Inappropriate Speed Limits==		- [[949.1 Voiding City Ordinances on State Routes with Inappropriate Speed Limits\|949.1 Voiding City Ordinances on State Routes with Inappropriate Speed Limits]]

	~~Paragraph 4 of House Bill 1047 of the 88<sup>th</sup> General Assembly states that the Commission may declare any ordinance void if it finds that ordinance is:~~		- [[949.2 Prevailing Speed Determination\|949.2 Prevailing Speed Determination]]

	1. ~~Not primarily designed to expedite traffic flow; and~~		- [[949.3 Local Exchange of Transportation Services (LETS)\|949.3 Local Exchange of Transportation Services (LETS)]]

	~~2. Primarily designed to produce revenue for the city, town or village that enacted the ordinance.~~

	~~If the District Engineer believes that a city, village or town has enacted such an ordinance, he shall see that the following actions are taken:~~

	~~1. Advise the city that a study will be made to determine the appropriate speed limit in the area.~~

	~~2. If a speed limit ordinance is found to be inappropriate as determined by a traffic engineering study and is determined to be for the purpose~~ of ~~producing revenue, a letter shall be sent to the city advising that their speed limit appears inappropriate and request a meeting with the city to discuss the matter~~.

	3~~. If a consensus cannot be obtained between the department and the city, the city would be notified~~ of ~~the date that the department’s recommendation will be presented to the Missouri Highways and~~ Transportation ~~Commission.~~

	4. If the Commission determines that the city speed limit is not correct as presently posted, the city shall be asked to adjust to the proper speed limit as determined by the Commission. If the city does not comply, the city speed limit ordinance will be declared void and posted as determined by the Commission.

	5. The city will then be notified of the Commission action and advised that all enforcement must be adjudicated through state courts unless the city passes and ordinance specifying the speed limit is the same as has been posted.

	==949.2 Prevailing Speed Determination==		==949.2 Prevailing Speed Determination==

Smithk: article construction

2007-10-17T19:06:24Z

article construction

← Older revision		Revision as of 14:06, 17 October 2007
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	Speed limits shall begin at a point on or as near in advanced of the point as possible where the speed limit is warranted and shall end at the point or as near the point as possible where the speed limit is not warranted.		Speed limits shall begin at a point on or as near in advanced of the point as possible where the speed limit is warranted and shall end at the point or as near the point as possible where the speed limit is not warranted.
			[[image:949.3 LETS.jpg\|right\|275px]]
			==949.3 Local Exchange of Transportation Services (LETS)==

			Article under construction.

Smithk: article construction - renumbered article to reflect removing ballbanking and annexation to other articles

2007-10-17T18:57:37Z

article construction - renumbered article to reflect removing ballbanking and annexation to other articles

← Older revision		Revision as of 13:57, 17 October 2007
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	==949.~~1 Advisory Speed Plaque (Ballbanking)==~~		[[image:949.jpg\|center\|750px]]

	Refer to [[903.6 Warning Signs#903.6.49 Advisory Speed Supplemental Plaque (W13-1) (MUTCD Section 2C.46)\|903.6.49 Advisory Speed Supplemental Plaque (W13-1) (MUTCD Section 2C.46)]] for information about Advisory Speed Plaques and ballbanking.		==949.1 Voiding City Ordinances on State Routes with Inappropriate Speed Limits==

	==949.~~2 Requests from Cities for Annexations==~~

	~~Refer to [[236.15 Requests from Cities for Annexations\|236.15 Requests from Cities for Annexations]]~~

	~~==949.3~~ Voiding City Ordinances on State Routes with Inappropriate Speed Limits==

	Paragraph 4 of House Bill 1047 of the 88<sup>th</sup> General Assembly states that the Commission may declare any ordinance void if it finds that ordinance is:		Paragraph 4 of House Bill 1047 of the 88<sup>th</sup> General Assembly states that the Commission may declare any ordinance void if it finds that ordinance is:
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	5. The city will then be notified of the Commission action and advised that all enforcement must be adjudicated through state courts unless the city passes and ordinance specifying the speed limit is the same as has been posted.		5. The city will then be notified of the Commission action and advised that all enforcement must be adjudicated through state courts unless the city passes and ordinance specifying the speed limit is the same as has been posted.

	==949.4 Prevailing Speed Determination==		==949.2 Prevailing Speed Determination==

	Prevailing speed determination is the method used by the department as criteria for speed limit determination in incorporated and unincorporated areas.		Prevailing speed determination is the method used by the department as criteria for speed limit determination in incorporated and unincorporated areas.
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	:6. Parking		:6. Parking

	===949.4.1 Accident Rate (AR)===		===949.2.1 Accident Rate (AR)===

	If the accident rate, based on reportable accidents within the proposed zone, is 50 percent higher than the statewide average accident rate (SWAR) for the same classification of highways, prevailing speed may be reduced by 5 percent. If the accident rate is more than twice the statewide rate for this classification, the prevailing speed may be reduced by 10 percent. Minor accidents, not reportable under state statutes, are not to be considered since the reduction in speed will not normally reduce the number of accidents but may reduce the severity of those accidents that occur. Current information regarding accident rates can be found in TMS.		If the accident rate, based on reportable accidents within the proposed zone, is 50 percent higher than the statewide average accident rate (SWAR) for the same classification of highways, prevailing speed may be reduced by 5 percent. If the accident rate is more than twice the statewide rate for this classification, the prevailing speed may be reduced by 10 percent. Minor accidents, not reportable under state statutes, are not to be considered since the reduction in speed will not normally reduce the number of accidents but may reduce the severity of those accidents that occur. Current information regarding accident rates can be found in TMS.

	=====<center>Table 949.4.1 Prevailing Speed Reduction</center>=====		=====<center>Table 949.2.1 Prevailing Speed Reduction</center>=====
	{\| border="1" class="wikitable" style="margin: 1em auto 1em auto"		{\| border="1" class="wikitable" style="margin: 1em auto 1em auto"
	\|+		\|+
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	\|}		\|}

	===949.4.2 Access to Driveway===		===949.2.2 Access to Driveway===

	The effect of driveway entrances will be determined by using a Driveway Conflict Number. For this purpose, a private or field entrance shall have a Driveway Conflict Number of 1. Minor commercial entrances shall have a number of 5. Major commercial entrances, shopping centers or industrial plant entrances that generate relatively high volumes of traffic, and public streets shall have a number of 10. If the total Driveway Conflict Number exceeds a rate of 40 per mile through the proposed zone, the prevailing speed may be reduced by 5 percent. If the total number exceeds a rate of 60 per mile, the prevailing speed may be reduced by 10 percent. However, before a reduction can be made due to the Driveway Conflict Number, the Poisson Curve must be used to determine if the accident reduction is statistically significant.		The effect of driveway entrances will be determined by using a Driveway Conflict Number. For this purpose, a private or field entrance shall have a Driveway Conflict Number of 1. Minor commercial entrances shall have a number of 5. Major commercial entrances, shopping centers or industrial plant entrances that generate relatively high volumes of traffic, and public streets shall have a number of 10. If the total Driveway Conflict Number exceeds a rate of 40 per mile through the proposed zone, the prevailing speed may be reduced by 5 percent. If the total number exceeds a rate of 60 per mile, the prevailing speed may be reduced by 10 percent. However, before a reduction can be made due to the Driveway Conflict Number, the Poisson Curve must be used to determine if the accident reduction is statistically significant.

	[[image:949.4.2 Driveway Conflict.jpg\|center\|550px\|thumb\|<center>'''Figure 949.4.2'''</center>]]		[[image:949.4.2 Driveway Conflict.jpg\|center\|550px\|thumb\|<center>'''Figure 949.2.2'''</center>]]

	The test is as follows:		The test is as follows:

	a) Consult Fig. 949.4.2, using the current number of accidents for the last year.		a) Consult Fig. 949.2.2, using the current number of accidents for the last year.

	b) Determine the graph’s percent value from the Poisson Curve.		b) Determine the graph’s percent value from the Poisson Curve.
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	:8.0-mile section of roadway, ADT = 3,100, 30 accidents within last year.		:8.0-mile section of roadway, ADT = 3,100, 30 accidents within last year.

	:a & b). Value obtained from Fig. 949.4.2 = 30 %		:a & b). Value obtained from Fig. 949.2.2 = 30 %

	:c).<math>\mbox{AR}=\mbox{331.4}=\frac{\mbox{30(100,000,000)}}		:c).<math>\mbox{AR}=\mbox{331.4}=\frac{\mbox{30(100,000,000)}}
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	:Since 26.9 is less than 30, the Driveway Conflict Number cannot be considered.		:Since 26.9 is less than 30, the Driveway Conflict Number cannot be considered.

	===949.4.3 Traffic Control Devices===		===949.2.3 Traffic Control Devices===

	Sections of roadway consisting of a curvy or series of curves and turns and other geometric problems should be signed with the appropriate [[903.6 Warning Signs\|warning signs]] where it is customary to use these signs. [[903.5 Regulatory Signs#903.5.8 SPEED LIMIT Sign (R2-1) (MUTCD Section 2B.13)\|Speed limit signs]] would not be considered where a warning sign is needed to advise the motorist of an approaching condition.		Sections of roadway consisting of a curvy or series of curves and turns and other geometric problems should be signed with the appropriate [[903.6 Warning Signs\|warning signs]] where it is customary to use these signs. [[903.5 Regulatory Signs#903.5.8 SPEED LIMIT Sign (R2-1) (MUTCD Section 2B.13)\|Speed limit signs]] would not be considered where a warning sign is needed to advise the motorist of an approaching condition.


	===949.4.4 Length of Section ===		===949.2.4 Length of Section ===

	Enter the distance.		Enter the distance.

	===949.4.5 Pedestrian Traffic ===		===949.2.5 Pedestrian Traffic ===

	Where sidewalks are not provided adjacent to the route and a total pedestrian traffic along the route exceeds 10 per hour for 3 hours of any 8-hour period, the prevailing speed may be reduced by 5 percent. Pedestrians crossing the route may be counted if the point of crossing is not protected by some other form of traffic control device.		Where sidewalks are not provided adjacent to the route and a total pedestrian traffic along the route exceeds 10 per hour for 3 hours of any 8-hour period, the prevailing speed may be reduced by 5 percent. Pedestrians crossing the route may be counted if the point of crossing is not protected by some other form of traffic control device.

	===949.4.6 Parking ===		===949.2.6 Parking ===

	Where parking is permitted adjacent to the traffic lane, the prevailing speed may be reduced by 5 percent. The prevailing speed determined by the 85<sup>th</sup> percentile speed, the pace speed and the average test run shall not be reduced by more than 10 mph by using Steps a through f of 949.4.2. All reductions shall be in 5 mph increments.		Where parking is permitted adjacent to the traffic lane, the prevailing speed may be reduced by 5 percent. The prevailing speed determined by the 85<sup>th</sup> percentile speed, the pace speed and the average test run shall not be reduced by more than 10 mph by using Steps a through f of 949.2.2. All reductions shall be in 5 mph increments.

	===949.4.7 Procedures for Obtaining Prevailing Speed Data===		===949.2.7 Procedures for Obtaining Prevailing Speed Data===

	Spot speed studies can be made with any speed measurement device such as radar, count cards and inductive loops that determine the 85<sup>th</sup> percentile speed and the upper limit of the 10 mph pace. The 85<sup>th</sup> percentile speed is defined as the speed at or below which 85 percent of the vehicles are traveling. The 10 mph pace is defined as the 10 mph range containing the most vehicles.		Spot speed studies can be made with any speed measurement device such as radar, count cards and inductive loops that determine the 85<sup>th</sup> percentile speed and the upper limit of the 10 mph pace. The 85<sup>th</sup> percentile speed is defined as the speed at or below which 85 percent of the vehicles are traveling. The 10 mph pace is defined as the 10 mph range containing the most vehicles.
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	Average test run speeds shall be determined on the basis of at least two runs in each direction over the length of the proposed zone. The prime consideration in these test runs is to determine a maximum permissible speed. Speeds are to be recorded at 0.1-mile intervals. While making the test run, the driver will try to “float” in the traffic stream, passing as many vehicles as pass the test car.		Average test run speeds shall be determined on the basis of at least two runs in each direction over the length of the proposed zone. The prime consideration in these test runs is to determine a maximum permissible speed. Speeds are to be recorded at 0.1-mile intervals. While making the test run, the driver will try to “float” in the traffic stream, passing as many vehicles as pass the test car.

	===949.4.8 Additional Guidelines for Establishing Speed Limits===		===949.2.8 Additional Guidelines for Establishing Speed Limits===

	Normally, isolated curves and turns, areas of restricted sight distance, no passing zones, etc. will not be considered as areas for lowering speed limits. The accident record on such highways will be the principle criterion. Critical speed signs shall be used in connection with the appropriate warning signs at these locations.		Normally, isolated curves and turns, areas of restricted sight distance, no passing zones, etc. will not be considered as areas for lowering speed limits. The accident record on such highways will be the principle criterion. Critical speed signs shall be used in connection with the appropriate warning signs at these locations.

Smithk: moved 949.2 Request from Cities for Annexations to 236.15 since Traffic no longer does this work

2007-09-19T16:51:13Z

moved 949.2 Request from Cities for Annexations to 236.15 since Traffic no longer does this work

@@ Line 5: / Line 5: @@
 ==949.2 Requests from Cities for Annexations==
-[[image:949.2 request from cities for Annexations.jpg|left|475px]]
+Refer to [[236.15 Requests from Cities for Annexations|236.15 Requests from Cities for Annexations]]
 ==949.3 Voiding City Ordinances on State Routes with Inappropriate Speed Limits==

Smithk: article construction

2007-07-25T13:20:07Z

article construction

← Older revision		Revision as of 08:20, 25 July 2007
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	! style="background:#BEBEBE"\|Reduction Condition !! style="background:#BEBEBE"\|Pevailing Speed Reduction		! style="background:#BEBEBE"\|Reduction Condition !! style="background:#BEBEBE"\|Pevailing Speed Reduction
	\|-		\|-
	\| align="center"\| AR > 0.5 SWAR \|\| align="center"\| 5%		\| align="center"\| AR > 1.5 SWAR \|\| align="center"\| 5%
	\|-		\|-
	\| align="center"\| AR > 2.0 SWAR \|\| align="center"\|10%		\| align="center"\| AR > 2.0 SWAR \|\| align="center"\|10%

Smithk: article construction

2007-07-23T14:34:46Z

article construction

← Older revision		Revision as of 09:34, 23 July 2007
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	==949.1 Advisory Speed Plaque (Ballbanking)==		==949.1 Advisory Speed Plaque (Ballbanking)==

	~~The procedure~~ to determine the safe speed on a curve or turn is a ball bank study. To correctly use the ball bank indicator, the ball bank indicator should be mounted on the dashboard of a passenger car and adjusted to read "0" when the car is stationary on a level grade with the ball bank indicator being in a vertical plane. When adjusting the indicator, all personnel who are to be in the car while testing should be in their seats and all four tires should have the same pressure. It is usually best for at least two persons to be in the car while taking the ball bank reading: one for driving, the other for observation and recording.		Refer to [[903.6 Warning Signs#903.6.49 Advisory Speed Supplemental Plaque (W13-1) (MUTCD Section 2C.46)\|903.6.49 Advisory Speed Supplemental Plaque (W13-1) (MUTCD Section 2C.46)]] for information about Advisory Speed Plaques and ballbanking.

	The 10-degree reading that can be maintained the complete length of a curve is the appropriate safe speed for that curve. Care must be taken to maintain the car in its proper lane and to maintain a smooth even speed throughout the curve. It will occasionally be found that a curve will have a higher safe speed in one direction than the other. In such cases, the lower safe speed should be used for both directions. Only increments of 5 mph are used on the [[903.6 Warning Signs#903.6.49 Advisory Speed Supplemental Plaque (W13-1) (MUTCD Section 2C.46)\|Advisory Speed Plaque]]~~, therefore the curve shall be posted to the nearest 5 mph speed from the survey~~.

	==949.2 Requests from Cities for Annexations==		==949.2 Requests from Cities for Annexations==

← Older revision		Revision as of 16:36, 11 February 2010
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	- [[949.1 Voiding City Ordinances on State Routes with Inappropriate Speed Limits\|949.1 Voiding City Ordinances on State Routes with Inappropriate Speed Limits]]		- [[949.1 Voiding City Ordinances on State Routes with Inappropriate Speed Limits\|949.1 Voiding City Ordinances on State Routes with Inappropriate Speed Limits]]

	- [[949.2 ~~Prevailing~~ Speed ~~Determination~~\|949.2 ~~Prevailing~~ Speed ~~Determination~~]]		- [[949.2 Speed Limit Guidelines\|949.2 Speed Limit Guidelines]]

	- [[949.3 Local Exchange of Transportation Services (LETS)\|949.3 Local Exchange of Transportation Services (LETS)]]		- [[949.3 Local Exchange of Transportation Services (LETS)\|949.3 Local Exchange of Transportation Services (LETS)]]