902.12 Rectangular Rapid Flashing Beacons (MUTCD Chapter 4L) - Revision history

RollerA: /* {{SpanID|902.12.2}}902.12.2 Design of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.02) */

2025-11-25T18:09:18Z

{{SpanID|902.12.2}}902.12.2 Design of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.02)

← Older revision		Revision as of 13:09, 25 November 2025
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	'''Option. '''A small light directed at and visible to pedestrians in the crosswalk may be installed integral to the RRFB or pedestrian push button detector to give confirmation that the RRFB is in operation.		'''Option. '''A small light directed at and visible to pedestrians in the crosswalk may be installed integral to the RRFB or pedestrian push button detector to give confirmation that the RRFB is in operation.



	{{SpanID\|fig902.12.2}}		{{SpanID\|fig902.12.2}}
	[[File:~~4l1~~.png\|thumbnail\|center\|alt=The intersection of a two-lane horizontal with a two-lane vertical roadway is shown. Both roadways have one lane of travel in each direction. Each intersection has a crosswalk shown as a series of closely spaced solid white lines with curb ramps at each end leading to a sidewalk.		[[File:Figure 902.12.2 Example of RRFBs at Uncontrolled, Marked Crosswalks at an Intersection.png\|thumbnail\|center\|alt=The intersection of a two-lane horizontal with a two-lane vertical roadway is shown. Both roadways have one lane of travel in each direction. Each intersection has a crosswalk shown as a series of closely spaced solid white lines with curb ramps at each end leading to a sidewalk.
	At the bottom of the figure, approaching the intersection from the south in advance of the crosswalk, two sign assemblies composed of a W11-2 sign mounted above a W16-7PL plaque with a rectangular rapid flashing beacon (RRFB) in between the sign and plaque is shown. These sign assemblies with RRFBs are shown on both sides of the roadway, to the right and left of the sidewalk, facing south.		At the bottom of the figure, approaching the intersection from the south in advance of the crosswalk, two sign assemblies composed of a W11-2 sign mounted above a W16-7PL plaque with a rectangular rapid flashing beacon (RRFB) in between the sign and plaque is shown. These sign assemblies with RRFBs are shown on both sides of the roadway, to the right and left of the sidewalk, facing south.
	At the top of the figure, the same sign assemblies with RRFBs are shown on both sides of the roadway facing north.		At the top of the figure, the same sign assemblies with RRFBs are shown on both sides of the roadway facing north.
	On the left and right of the horizontal roadway, an R1-1 sign is shown facing traffic approaching the intersection. A solid white “stop bar” is shown on the pavement, in advance of the crosswalk, parallel to the locations of R1-1 signs on the horizontal roadway. \|800px\|'''Figure 902.12.2.''' Example of RRFBs at Uncontrolled, Marked Crosswalks at an Intersection. <br><br>'''Notes:'''<br><ol><li>When activated, the RRFBs on both approaches shall simultaneously commence operation of their rapid flashing indications and shall cease operation simultaneously.</li><li>If place overhead, follow the requirements of the tenth paragraph of [[#902.12.2.10\|EPG 902.12.2]], except that the signs may be placed approximately over the center of the intersection.</li></ol>]]		On the left and right of the horizontal roadway, an R1-1 sign is shown facing traffic approaching the intersection. A solid white “stop bar” is shown on the pavement, in advance of the crosswalk, parallel to the locations of R1-1 signs on the horizontal roadway. \|800px\|'''Figure 902.12.2''' Example of RRFBs at Uncontrolled, Marked Crosswalks at an Intersection <br><br>'''Notes:'''<br><ol><li>When activated, the RRFBs on both approaches shall simultaneously commence operation of their rapid flashing indications and shall cease operation simultaneously.</li><li>If place overhead, follow the requirements of the tenth paragraph of [[#902.12.2.10\|EPG 902.12.2]], except that the signs may be placed approximately over the center of the intersection.</li></ol>]]

	=={{SpanID\|902.12.3}}902.12.3 Operation of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.03)==		=={{SpanID\|902.12.3}}902.12.3 Operation of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.03)==

RollerA: /* {{SpanID|902.12.2}}902.12.2 Design of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.02) */

2025-11-05T21:22:54Z

{{SpanID|902.12.2}}902.12.2 Design of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.02)

← Older revision		Revision as of 16:22, 5 November 2025
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	'''Option. '''If the RRFB indications are so bright that they cause excessive glare during nighttime conditions, an automatic signal dimming device may be used to reduce the brilliance of the RRFB indications during nighttime conditions.		'''Option. '''If the RRFB indications are so bright that they cause excessive glare during nighttime conditions, an automatic signal dimming device may be used to reduce the brilliance of the RRFB indications during nighttime conditions.

	'''Standard. '''If pedestrian push button detectors (rather than passive detection) are used to actuate the RRFB indications, a PUSH BUTTON FOR WARNING LIGHTS/WAIT FOR GAP IN TRAFFIC (R10-25) sign (see [[903.2 Regulatory Signs and Barricades #903.2.47\|EPG 903.2.47]]) shall be installed adjacent to a pedestrian push button detector explaining the purpose and use of the pedestrian push button detector.		'''Standard. '''If pedestrian push button detectors (rather than passive detection) are used to actuate the RRFB indications, a PUSH BUTTON FOR WARNING LIGHTS/WAIT FOR GAP IN TRAFFIC (R10-25) sign (see [[903.2 Regulatory Signs and Barricades (MUTCD Chapter 2B) #903.2.47\|EPG 903.2.47]]) shall be installed adjacent to a pedestrian push button detector explaining the purpose and use of the pedestrian push button detector.

	'''Support. '''[[902.9 Pedestrian Control Features (MUTCD Chapter 4I) #902.9.5\|EPG 902.9.5]] contains further information about pedestrian push button detector location criteria.		'''Support. '''[[902.9 Pedestrian Control Features (MUTCD Chapter 4I) #902.9.5\|EPG 902.9.5]] contains further information about pedestrian push button detector location criteria.

TaracksA: /* {{SpanID|902.12.2}}902.12.2 Design of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.02) */

2025-10-29T21:58:22Z

{{SpanID|902.12.2}}902.12.2 Design of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.02)

← Older revision		Revision as of 16:58, 29 October 2025
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	{{SpanID\|fig902.12.2}}		{{SpanID\|fig902.12.2}}
	[[File:4l1.~~jpg~~\|thumbnail\|center\|alt=The intersection of a two-lane horizontal with a two-lane vertical roadway is shown. Both roadways have one lane of travel in each direction. Each intersection has a crosswalk shown as a series of closely spaced solid white lines with curb ramps at each end leading to a sidewalk.		[[File:4l1.png\|thumbnail\|center\|alt=The intersection of a two-lane horizontal with a two-lane vertical roadway is shown. Both roadways have one lane of travel in each direction. Each intersection has a crosswalk shown as a series of closely spaced solid white lines with curb ramps at each end leading to a sidewalk.
	At the bottom of the figure, approaching the intersection from the south in advance of the crosswalk, two sign assemblies composed of a W11-2 sign mounted above a W16-7PL plaque with a rectangular rapid flashing beacon (RRFB) in between the sign and plaque is shown. These sign assemblies with RRFBs are shown on both sides of the roadway, to the right and left of the sidewalk, facing south.		At the bottom of the figure, approaching the intersection from the south in advance of the crosswalk, two sign assemblies composed of a W11-2 sign mounted above a W16-7PL plaque with a rectangular rapid flashing beacon (RRFB) in between the sign and plaque is shown. These sign assemblies with RRFBs are shown on both sides of the roadway, to the right and left of the sidewalk, facing south.
	At the top of the figure, the same sign assemblies with RRFBs are shown on both sides of the roadway facing north.		At the top of the figure, the same sign assemblies with RRFBs are shown on both sides of the roadway facing north.

HogsettC: /* {{SpanID|902.12.2}}902.12.2 Design of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.02) */

2025-10-27T16:27:59Z

{{SpanID|902.12.2}}902.12.2 Design of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.02)

← Older revision		Revision as of 11:27, 27 October 2025
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	'''Option. '''If the RRFB indications are so bright that they cause excessive glare during nighttime conditions, an automatic signal dimming device may be used to reduce the brilliance of the RRFB indications during nighttime conditions.		'''Option. '''If the RRFB indications are so bright that they cause excessive glare during nighttime conditions, an automatic signal dimming device may be used to reduce the brilliance of the RRFB indications during nighttime conditions.

	'''Standard. '''If pedestrian push button detectors (rather than passive detection) are used to actuate the RRFB indications, a PUSH BUTTON FOR WARNING LIGHTS/WAIT FOR GAP IN TRAFFIC (R10-25) sign (see [[--\|~~Section 2B~~.58]]) shall be installed adjacent to a pedestrian push button detector explaining the purpose and use of the pedestrian push button detector.		'''Standard. '''If pedestrian push button detectors (rather than passive detection) are used to actuate the RRFB indications, a PUSH BUTTON FOR WARNING LIGHTS/WAIT FOR GAP IN TRAFFIC (R10-25) sign (see [[903.2 Regulatory Signs and Barricades #903.2.47\|EPG 903.2.47]]) shall be installed adjacent to a pedestrian push button detector explaining the purpose and use of the pedestrian push button detector.

	'''Support. '''[[902.9 Pedestrian Control Features (MUTCD Chapter 4I) #902.9.5\|EPG 902.9.5]] contains further information about pedestrian push button detector location criteria.		'''Support. '''[[902.9 Pedestrian Control Features (MUTCD Chapter 4I) #902.9.5\|EPG 902.9.5]] contains further information about pedestrian push button detector location criteria.

TaracksA: /* {{SpanID|902.12.2}}902.12.2 Design of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.02) */

2025-10-13T19:46:11Z

{{SpanID|902.12.2}}902.12.2 Design of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.02)

← Older revision		Revision as of 14:46, 13 October 2025
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	The two RRFB indications for each RRFB unit shall be aligned horizontally, with the longer dimension horizontal and with a minimum space between the two indications of at least 7 inches, measured from nearest edge of one indication to the nearest edge of the other indication. The outside edges of the RRFB indications, including any housings, shall not project beyond the outside edges of the W11-2, S1-1, or W11-15 sign that it supplements.		The two RRFB indications for each RRFB unit shall be aligned horizontally, with the longer dimension horizontal and with a minimum space between the two indications of at least 7 inches, measured from nearest edge of one indication to the nearest edge of the other indication. The outside edges of the RRFB indications, including any housings, shall not project beyond the outside edges of the W11-2, S1-1, or W11-15 sign that it supplements.

	An RRFB unit shall not be installed independent of the crossing warning signs for the approach that the RRFB faces. If the RRFB unit is supplementing a post-mounted sign, the RRFB unit shall be installed on the same support as the associated W11-2, S1-1, or W11-15 crossing warning sign and plaque. If the RRFB unit is supplementing an overhead-mounted sign, the RRFB unit shall be mounted directly above the top of the sign or below the bottom of the sign.		An RRFB unit shall not be installed independent of the crossing warning signs for the approach that the RRFB faces. If the RRFB unit is supplementing a post-mounted sign, the RRFB unit shall be installed on the same support as the associated W11-2 S1-1, or W11-15 crossing warning sign and plaque. If the RRFB unit is supplementing an overhead-mounted sign, the RRFB unit shall be mounted directly above the top of the sign or below the bottom of the sign.

	'''Option. '''As a specific exception to the first guidance paragraph of [[902.18 Flashing Beacons (MUTCD Chapter 4S) #902.18.1\|EPG 902.18.1]], the RRFB unit associated with a post-mounted sign and plaque may be located between and immediately adjacent to the bottom of the crossing warning sign and the top of the supplemental downward diagonal arrow plaque (or, in the case of a supplemental advance sign, the AHEAD or distance plaque) or within 12 inches above the crossing warning sign, rather than the recommended minimum of 12 inches above or below the sign assembly.		'''Option. '''As a specific exception to the first guidance paragraph of [[902.18 Flashing Beacons (MUTCD Chapter 4S) #902.18.1\|EPG 902.18.1]], the RRFB unit associated with a post-mounted sign and plaque may be located between and immediately adjacent to the bottom of the crossing warning sign and the top of the supplemental downward diagonal arrow plaque (or, in the case of a supplemental advance sign, the AHEAD or distance plaque) or within 12 inches above the crossing warning sign, rather than the recommended minimum of 12 inches above or below the sign assembly.

	'''Standard. '''For any approach on which RRFBs are used to supplement post-mounted signs, at least two W11-2 , S1-1, or W11-15 crossing warning signs (each with an RRFB unit and a W16-7P plaque) shall be installed at the crosswalk, one on the right-hand side of the roadway and one on the left-hand side of the roadway.		'''Standard. '''For any approach on which RRFBs are used to supplement post-mounted signs, at least two W11-2 S1-1, or W11-15 crossing warning signs (each with an RRFB unit and a W16-7P plaque) shall be installed at the crosswalk, one on the right-hand side of the roadway and one on the left-hand side of the roadway.

	'''Guidance. '''On a divided highway, the left-hand side RRFB assembly should be installed in the median, if practicable, rather than on the far left side of the highway.		'''Guidance. '''On a divided highway, the left-hand side RRFB assembly should be installed in the median, if practicable, rather than on the far left side of the highway.
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	{{SpanID\|902.12.2.10}}		{{SpanID\|902.12.2.10}}
	'''Standard. '''For any approach on which RRFBs are used to supplement an overhead-mounted sign, at least one W11-2 , S1-1, or W11-15 crossing warning sign (without a W16-7P plaque) located approximately over the center of the lanes of the approach (or where optimum visibility can be achieved) shall be installed at the crosswalk.		'''Standard. '''For any approach on which RRFBs are used to supplement an overhead-mounted sign, at least one W11-2 S1-1, or W11-15 crossing warning sign (without a W16-7P plaque) located approximately over the center of the lanes of the approach (or where optimum visibility can be achieved) shall be installed at the crosswalk.

	If used at intersections, the design of the RRFBs shall conform to the requirements for post-mounted or overhead placement described in the third standard paragraph of this Article.		If used at intersections, the design of the RRFBs shall conform to the requirements for post-mounted or overhead placement described in the third standard paragraph of this Article.

TaracksA: /* {{SpanID|902.12.2}}902.12.2 Design of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.02) */

2025-10-13T19:44:35Z

{{SpanID|902.12.2}}902.12.2 Design of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.02)

← Older revision		Revision as of 14:44, 13 October 2025
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	The two RRFB indications for each RRFB unit shall be aligned horizontally, with the longer dimension horizontal and with a minimum space between the two indications of at least 7 inches, measured from nearest edge of one indication to the nearest edge of the other indication. The outside edges of the RRFB indications, including any housings, shall not project beyond the outside edges of the W11-2, S1-1, or W11-15 sign that it supplements.		The two RRFB indications for each RRFB unit shall be aligned horizontally, with the longer dimension horizontal and with a minimum space between the two indications of at least 7 inches, measured from nearest edge of one indication to the nearest edge of the other indication. The outside edges of the RRFB indications, including any housings, shall not project beyond the outside edges of the W11-2, S1-1, or W11-15 sign that it supplements.

	An RRFB unit shall not be installed independent of the crossing warning signs for the approach that the RRFB faces. If the RRFB unit is supplementing a post-mounted sign, the RRFB unit shall be installed on the same support as the associated W11-2, S1-1, or W11-15 crossing warning sign and plaque. If the RRFB unit is supplementing an overhead-mounted sign, the RRFB unit shall be mounted directly above the top of sign or below the bottom of the sign.		An RRFB unit shall not be installed independent of the crossing warning signs for the approach that the RRFB faces. If the RRFB unit is supplementing a post-mounted sign, the RRFB unit shall be installed on the same support as the associated W11-2, S1-1, or W11-15 crossing warning sign and plaque. If the RRFB unit is supplementing an overhead-mounted sign, the RRFB unit shall be mounted directly above the top of the sign or below the bottom of the sign.

	'''Option. '''As a specific exception to the first guidance paragraph of [[902.18 Flashing Beacons (MUTCD Chapter 4S) #902.18.1\|EPG 902.18.1]], the RRFB unit associated with a post-mounted sign and plaque may be located between and immediately adjacent to the bottom of the crossing warning sign and the top of the supplemental downward diagonal arrow plaque (or, in the case of a supplemental advance sign, the AHEAD or distance plaque) or within 12 inches above the crossing warning sign, rather than the recommended minimum of 12 inches above or below the sign assembly.		'''Option. '''As a specific exception to the first guidance paragraph of [[902.18 Flashing Beacons (MUTCD Chapter 4S) #902.18.1\|EPG 902.18.1]], the RRFB unit associated with a post-mounted sign and plaque may be located between and immediately adjacent to the bottom of the crossing warning sign and the top of the supplemental downward diagonal arrow plaque (or, in the case of a supplemental advance sign, the AHEAD or distance plaque) or within 12 inches above the crossing warning sign, rather than the recommended minimum of 12 inches above or below the sign assembly.

TaracksA: /* {{SpanID|902.12.1}}902.12.1 Application of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.01) */

2025-10-13T19:44:09Z

{{SpanID|902.12.1}}902.12.1 Application of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.01)

← Older revision		Revision as of 14:44, 13 October 2025
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	'''Standard. '''An RRFB shall only be installed to function as a Warning Beacon (see [[902.18 Flashing Beacons (MUTCD Chapter 4S) #902.18.3\|EPG 902.18.3]]). Except as otherwise provided in this Article, all other provisions of the MUTCD applicable to Warning Beacons shall apply to RRFBs.		'''Standard. '''An RRFB shall only be installed to function as a Warning Beacon (see [[902.18 Flashing Beacons (MUTCD Chapter 4S) #902.18.3\|EPG 902.18.3]]). Except as otherwise provided in this Article, all other provisions of the MUTCD applicable to Warning Beacons shall apply to RRFBs.

	An RRFB shall only be used to supplement a post-mounted W11-2 (Pedestrian), S1-1 (School), or W11-15 (Trail) crossing warning sign with a diagonal downward arrow (W16-7P) plaque, or an overhead-mounted W11-2 , S1-1, or W11-15 crossing warning sign, located at or immediately adjacent to a marked crosswalk.		An RRFB shall only be used to supplement a post-mounted W11-2 (Pedestrian), S1-1 (School), or W11-15 (Trail) crossing warning sign with a diagonal downward arrow (W16-7P) plaque, or an overhead-mounted W11-2, S1-1, or W11-15 crossing warning sign, located at or immediately adjacent to a marked crosswalk.

	Except for crosswalks across the approach to or egress from a roundabout, or crosswalks across free-flow turn lanes separated by a channelizing island, an RRFB shall not be used for crosswalks across approaches controlled by YIELD signs, STOP signs, traffic control signals, or pedestrian hybrid beacons.		Except for crosswalks across the approach to or egress from a roundabout, or crosswalks across free-flow turn lanes separated by a channelizing island, an RRFB shall not be used for crosswalks across approaches controlled by YIELD signs, STOP signs, traffic control signals, or pedestrian hybrid beacons.

TaracksA at 18:20, 6 October 2025

2025-10-06T18:20:39Z

← Older revision		Revision as of 13:20, 6 October 2025
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	[[Category:902 Signals\|902.12]]		[[Category:902 Signals (MUTCD Part 4)\|902.12]]

	=={{SpanID\|902.12.1}}902.12.1 Application of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.01)==		=={{SpanID\|902.12.1}}902.12.1 Application of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.01)==

TaracksA: /* {{SpanID|902.12.3}}902.12.3 Operation of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.03) */

2025-10-06T18:00:49Z

{{SpanID|902.12.3}}902.12.3 Operation of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.03)

← Older revision		Revision as of 13:00, 6 October 2025
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	'''Standard. '''The predetermined flash period shall be immediately initiated each and every time that a pedestrian is detected either through passive detection or as a result of a pedestrian pressing a push button detector, including when pedestrians are detected while the RRFBs are already flashing and when pedestrians are detected immediately after the RRFBs have ceased flashing.		'''Standard. '''The predetermined flash period shall be immediately initiated each and every time that a pedestrian is detected either through passive detection or as a result of a pedestrian pressing a push button detector, including when pedestrians are detected while the RRFBs are already flashing and when pedestrians are detected immediately after the RRFBs have ceased flashing.

	When activated, the two yellow indications in each RRFB unit shall flash in a rapidly flashing sequence. As a specific exception to the requirements for the flash rate of beacons provided in the ~~fifth~~ paragraph of [[902.18 Flashing Beacons (MUTCD Chapter 4S) #902.18.1\|EPG 902.18.1]], RRFBs shall use a much faster flash rate and shall provide 75 flashing sequences per minute.		When activated, the two yellow indications in each RRFB unit shall flash in a rapidly flashing sequence. As a specific exception to the requirements for the flash rate of beacons provided in the second standard paragraph of [[902.18 Flashing Beacons (MUTCD Chapter 4S) #902.18.1\|EPG 902.18.1]], RRFBs shall use a much faster flash rate and shall provide 75 flashing sequences per minute.

	Except as provided in the ~~eighth~~ paragraph ~~of this Article~~, during each 800-millisecond flashing sequence, the left and right RRFB indications shall operate using the following sequence:		Except as provided in the subsequent paragraph, during each 800-millisecond flashing sequence, the left and right RRFB indications shall operate using the following sequence:
	:A. The RRFB indication on the left-hand side shall be illuminated for approximately 50 milliseconds.		:A. The RRFB indication on the left-hand side shall be illuminated for approximately 50 milliseconds.
	:B. Both RRFB indications shall be dark for approximately 50 milliseconds.		:B. Both RRFB indications shall be dark for approximately 50 milliseconds.

TaracksA: /* {{SpanID|902.12.2}}902.12.2 Design of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.02) */

2025-10-06T17:59:05Z

{{SpanID|902.12.2}}902.12.2 Design of Rectangular Rapid Flashing Beacons (MUTCD Section 4L.02)

← Older revision		Revision as of 12:59, 6 October 2025
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	An RRFB unit shall not be installed independent of the crossing warning signs for the approach that the RRFB faces. If the RRFB unit is supplementing a post-mounted sign, the RRFB unit shall be installed on the same support as the associated W11-2, S1-1, or W11-15 crossing warning sign and plaque. If the RRFB unit is supplementing an overhead-mounted sign, the RRFB unit shall be mounted directly above the top of sign or below the bottom of the sign.		An RRFB unit shall not be installed independent of the crossing warning signs for the approach that the RRFB faces. If the RRFB unit is supplementing a post-mounted sign, the RRFB unit shall be installed on the same support as the associated W11-2, S1-1, or W11-15 crossing warning sign and plaque. If the RRFB unit is supplementing an overhead-mounted sign, the RRFB unit shall be mounted directly above the top of sign or below the bottom of the sign.

	'''Option. '''As a specific exception to the ~~eighth~~ paragraph of [[902.18 Flashing Beacons (MUTCD Chapter 4S) #902.18.1\|EPG 902.18.1]], the RRFB unit associated with a post-mounted sign and plaque may be located between and immediately adjacent to the bottom of the crossing warning sign and the top of the supplemental downward diagonal arrow plaque (or, in the case of a supplemental advance sign, the AHEAD or distance plaque) or within 12 inches above the crossing warning sign, rather than the recommended minimum of 12 inches above or below the sign assembly.		'''Option. '''As a specific exception to the first guidance paragraph of [[902.18 Flashing Beacons (MUTCD Chapter 4S) #902.18.1\|EPG 902.18.1]], the RRFB unit associated with a post-mounted sign and plaque may be located between and immediately adjacent to the bottom of the crossing warning sign and the top of the supplemental downward diagonal arrow plaque (or, in the case of a supplemental advance sign, the AHEAD or distance plaque) or within 12 inches above the crossing warning sign, rather than the recommended minimum of 12 inches above or below the sign assembly.

	'''Standard. '''For any approach on which RRFBs are used to supplement post-mounted signs, at least two W11-2 , S1-1, or W11-15 crossing warning signs (each with an RRFB unit and a W16-7P plaque) shall be installed at the crosswalk, one on the right-hand side of the roadway and one on the left-hand side of the roadway.		'''Standard. '''For any approach on which RRFBs are used to supplement post-mounted signs, at least two W11-2 , S1-1, or W11-15 crossing warning signs (each with an RRFB unit and a W16-7P plaque) shall be installed at the crosswalk, one on the right-hand side of the roadway and one on the left-hand side of the roadway.
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	'''Standard. '''For any approach on which RRFBs are used to supplement an overhead-mounted sign, at least one W11-2 , S1-1, or W11-15 crossing warning sign (without a W16-7P plaque) located approximately over the center of the lanes of the approach (or where optimum visibility can be achieved) shall be installed at the crosswalk.		'''Standard. '''For any approach on which RRFBs are used to supplement an overhead-mounted sign, at least one W11-2 , S1-1, or W11-15 crossing warning sign (without a W16-7P plaque) located approximately over the center of the lanes of the approach (or where optimum visibility can be achieved) shall be installed at the crosswalk.

	If used at intersections, the design of the RRFBs shall conform to the requirements for post-mounted or overhead placement described in the third paragraph of this Article.		If used at intersections, the design of the RRFBs shall conform to the requirements for post-mounted or overhead placement described in the third standard paragraph of this Article.

	'''Option. '''RRFBs may be installed at intersections with more than one crosswalk on the same uncontrolled approach (see [[#fig902.12.2\|Figure 902.12.2]]).		'''Option. '''RRFBs may be installed at intersections with more than one crosswalk on the same uncontrolled approach (see [[#fig902.12.2\|Figure 902.12.2]]).