616.2 Temporary Traffic Control Elements (MUTCD Chapter 6B) - Revision history

Hoskir: /* {{SpanID|616.2.9}}616.2.9 Detours and Diversions (MUTCD Section 6B.09) */ updated Support Links

2026-01-12T14:10:18Z

{{SpanID|616.2.9}}616.2.9 Detours and Diversions (MUTCD Section 6B.09): updated Support Links

← Older revision		Revision as of 09:10, 12 January 2026
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	'''Option. '''Alternate route signing may be used where lane closures or physical height or width restrictions will have a significant effect on traffic and a viable alternate route is available. Alternate route signing may also be used where temporary bridge weight restrictions are imposed during construction.		'''Option. '''Alternate route signing may be used where lane closures or physical height or width restrictions will have a significant effect on traffic and a viable alternate route is available. Alternate route signing may also be used where temporary bridge weight restrictions are imposed during construction.

	'''Support. '''For information regarding notification of detour routes, see [[616.20 Work Zone Safety and Mobility Policy#616.20.3.2.2_Community_Relations'_Managers_and/or_Customer_Service_Representatives\|EPG 616.20.3.2.2]], [[616.~~20 Work Zone Safety and Mobility Policy~~#616.20.~~9_Assessment_of_Work_Zone_Impacts~~\|EPG 616.20.9]], and [[616.~~20 Work Zone Safety and Mobility Policy~~#616.20.~~10_Work_Zone_Transportation_Management_Plan~~\|EPG 616.20.10]].		'''Support. '''For information regarding notification of detour routes, see [[616.20 Work Zone Safety and Mobility Policy#616.20.3.2.2_Community_Relations'_Managers_and/or_Customer_Service_Representatives\|EPG 616.20.3.2.2]], [[616.20_Work_Zone_Safety_and_Mobility_Policy#616.20.8_Assessment_of_Work_Zone_Impacts\|EPG 616.20.8]], and [[616.20_Work_Zone_Safety_and_Mobility_Policy#616.20.9_Work_Zone_Transportation_Management_Plan\|EPG 616.20.9]].

Hoskir: Renamed, renumbered and updated article due to MUTCD updates (See Special Ballot)

2026-01-08T19:43:09Z

Renamed, renumbered and updated article due to MUTCD updates (See Special Ballot)

Show changes

Hoskir: Hoskir moved page 616.3 Temporary Traffic Control Elements (MUTCD Chapter 6C) to 616.2 Temporary Traffic Control Elements (MUTCD Chapter 6B): renumbered and renamed due to MUTCD Update (See Special Ballot)

2026-01-08T19:40:41Z

Hoskir moved page 616.3 Temporary Traffic Control Elements (MUTCD Chapter 6C) to 616.2 Temporary Traffic Control Elements (MUTCD Chapter 6B): renumbered and renamed due to MUTCD Update (See Special Ballot)

← Older revision	Revision as of 14:40, 8 January 2026
(No difference)

Hoskir: /* Table 616.3.6 Recommended Length of Longitudinal Buffer Spaces */ updated per RR3874

2024-05-22T19:50:55Z

Table 616.3.6 Recommended Length of Longitudinal Buffer Spaces: updated per RR3874

← Older revision		Revision as of 14:50, 22 May 2024
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	====~~<center>~~Table 616.3.6 Recommended Length of Longitudinal Buffer Spaces====		====Table 616.3.6 Recommended Length of Longitudinal Buffer Spaces====

			<center>
	{\| border="1" class="wikitable" style="margin: 1em auto 1em auto"		{\| border="1" class="wikitable" style="margin: 1em auto 1em auto"
	\|+		\|+
	! style="background:#BEBEBE"\|Posted Speed Prior to Construction, mph!! style="background:#BEBEBE"\|Length, ft.		! style="background:#BEBEBE"\|Posted Speed Prior to Construction, mph!! style="background:#BEBEBE"\|Length, ft.
	\|-		\|-
	\| align="center"\| up to 35 \|\| align="center"\|~~280~~		\| align="center"\| up to 35 \|\| align="center"\|250
	\|-		\|-
	\| align="center"\|40 to 45\|\| align="center"\|~~400~~		\| align="center"\|40 to 45\|\| align="center"\|360
	\|-		\|-
	\| align="center"\|50 to 55\|\| align="center"\|~~560~~		\| align="center"\|50 to 55\|\| align="center"\|495
	\|-		\|-
	\| align="center"\|60 to 70\|\| align="center"\|~~840~~		\| align="center"\|60 to 70\|\| align="center"\|730
	\|}		\|}
	</center>		</center>

Smithk: Updated website links (for increased security)

2021-10-22T15:56:21Z

Updated website links (for increased security)

← Older revision		Revision as of 10:56, 22 October 2021
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	A flagger shall be stationed on the approach to the activity area to control vehicular traffic until the pilot vehicle is available.		A flagger shall be stationed on the approach to the activity area to control vehicular traffic until the pilot vehicle is available.

	Pilot vehicles may be specified to supplement flaggers when the length of the one-lane, two-way operation exceeds one-half mile. In addition to the flagger sign series, a vehicle mounted G20-4 “Pilot Car Follow Me” sign and PILOT CAR IN USE WAIT & FOLLOW (GO20-4a) sign shall be used in pilot vehicle operations. The access control and signing for each side road located within the work area of the one-lane, two-way operation should be determined as discussed in [[#616.3.10.1 Side Roads within the Work Area for One-Lane, Two-Way Operations\|EPG 616.3.10.1]]. Where applicable, the signing sequence for the side road should be supplemented with the PILOT CAR IN USE WAIT & FOLLOW (GO20-4a) sign. Refer to [https://epg.modot.org/files/2/25/616.8.10g_MT_2019.pdf Fig. 616.8.10g - MT], [~~http~~://epg.modot.org/index.php/616.8_Typical_Applications_(MUTCD_6H)#616.8.1_Listing_of_Typical_Applications Fig. 616.8.10 - MT].		Pilot vehicles may be specified to supplement flaggers when the length of the one-lane, two-way operation exceeds one-half mile. In addition to the flagger sign series, a vehicle mounted G20-4 “Pilot Car Follow Me” sign and PILOT CAR IN USE WAIT & FOLLOW (GO20-4a) sign shall be used in pilot vehicle operations. The access control and signing for each side road located within the work area of the one-lane, two-way operation should be determined as discussed in [[#616.3.10.1 Side Roads within the Work Area for One-Lane, Two-Way Operations\|EPG 616.3.10.1]]. Where applicable, the signing sequence for the side road should be supplemented with the PILOT CAR IN USE WAIT & FOLLOW (GO20-4a) sign. Refer to [https://epg.modot.org/files/2/25/616.8.10g_MT_2019.pdf Fig. 616.8.10g - MT], [https://epg.modot.org/index.php/616.8_Typical_Applications_(MUTCD_6H)#616.8.1_Listing_of_Typical_Applications Fig. 616.8.10 - MT].

	When a pilot vehicle is used, traffic delays should be limited to 15 minutes. If the wait is longer, inform your supervisor and an additional pilot vehicle may be used to keep the delay time within the 15-minute limit.		When a pilot vehicle is used, traffic delays should be limited to 15 minutes. If the wait is longer, inform your supervisor and an additional pilot vehicle may be used to keep the delay time within the 15-minute limit.

Smithk at 15:55, 22 October 2021

2021-10-22T15:55:23Z

← Older revision		Revision as of 10:55, 22 October 2021
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	'''Option.'''		'''Option.'''
	The workspace may be supplemented by channelizers and/or barricades placed perpendicular to the flow of traffic to deter non-construction related use of closed lanes. The longitudinal spacing and location of these devices are to be developed with the length of the closed lanes, work being performed and roadway characteristics in mind. For example, a longitudinal spacing of twice the normal sign spacing may be used for a paving operation on a limited access roadway, while the devices may be located upstream of a pavement repair area on the same type of facility. See [~~http~~://epg.modot.org/files/6/6d/616.8.48_MT.pdf Typical Application 616.8.48 (TA-48) Intermediate Lane Closure – DE/CM & MT].		The workspace may be supplemented by channelizers and/or barricades placed perpendicular to the flow of traffic to deter non-construction related use of closed lanes. The longitudinal spacing and location of these devices are to be developed with the length of the closed lanes, work being performed and roadway characteristics in mind. For example, a longitudinal spacing of twice the normal sign spacing may be used for a paving operation on a limited access roadway, while the devices may be located upstream of a pavement repair area on the same type of facility. See [https://epg.modot.org/files/6/6d/616.8.48_MT.pdf Typical Application 616.8.48 (TA-48) Intermediate Lane Closure – DE/CM & MT].

	===616.3.6.2 Traffic Space===		===616.3.6.2 Traffic Space===

Smithk: /* 616.3.16 Temporary Two-Lane, Two-Way Operations */ updated link

2021-03-05T13:07:06Z

616.3.16 Temporary Two-Lane, Two-Way Operations: updated link

← Older revision		Revision as of 08:07, 5 March 2021
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	:* The median shoulder width must be adequate for emergency stopping.		:* The median shoulder width must be adequate for emergency stopping.

	When a two-lane, two-way operation is used, the TCP must include provisions for separating opposing traffic throughout the length of the operation with temporary concrete traffic barrier or channelizing devices and temporary pavement marking as shown on [https://www.modot.org/media/16894 Standard Plans 617.20], [https://www.modot.org/media/16892 616.10] and [~~http~~://www.modot.~~mo.gov/business/standards_and_specs~~/~~documents~~/~~62010.pdf~~ 620.10], respectively, except when the two-lane, two-way operation is located on an urban travelway and the posted speed limit prior to construction is less than 45 mph. The speed limit for head-to-head traffic is based on [[616.12 Work Zone Speed Limits\|EPG 616.12 Work Zone Speed Limits]]. At these locations, all obstructions or fixed objects shall have protection provided for both directions of travel. This may require providing temporary installations of impact attenuators or crash cushions for guardrail, bridge ends, barrier walls, etc. on what would normally be the downstream side of the obstruction.		When a two-lane, two-way operation is used, the TCP must include provisions for separating opposing traffic throughout the length of the operation with temporary concrete traffic barrier or channelizing devices and temporary pavement marking as shown on [https://www.modot.org/media/16894 Standard Plans 617.20], [https://www.modot.org/media/16892 616.10] and [https://www.modot.org/media/16897 620.10], respectively, except when the two-lane, two-way operation is located on an urban travelway and the posted speed limit prior to construction is less than 45 mph. The speed limit for head-to-head traffic is based on [[616.12 Work Zone Speed Limits\|EPG 616.12 Work Zone Speed Limits]]. At these locations, all obstructions or fixed objects shall have protection provided for both directions of travel. This may require providing temporary installations of impact attenuators or crash cushions for guardrail, bridge ends, barrier walls, etc. on what would normally be the downstream side of the obstruction.

	Crossovers constructed to facilitate two-lane, two-way operation are designed for speeds not less than 10 mph below the posted speed limit prior to construction, unless unusual site conditions exist. Crossovers are located where horizontal and vertical alignments provide sufficient sight distance.		Crossovers constructed to facilitate two-lane, two-way operation are designed for speeds not less than 10 mph below the posted speed limit prior to construction, unless unusual site conditions exist. Crossovers are located where horizontal and vertical alignments provide sufficient sight distance.

Smithk at 13:07, 24 July 2020

2020-07-24T13:07:34Z

← Older revision		Revision as of 08:07, 24 July 2020
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	'''Option.'''		'''Option.'''
	The workspace may be supplemented by channelizers and/or barricades placed perpendicular to the flow of traffic to deter non-construction related use of closed lanes. The longitudinal spacing and location of these devices are to be developed with the length of the closed lanes, work being performed and roadway characteristics in mind. For example, a longitudinal spacing of twice the normal sign spacing may be used for a paving operation on a limited access roadway, while the devices may be located upstream of a pavement repair area on the same type of facility. See [~~https~~://epg.modot.org/files/6/6d/616.8.48_MT.pdf Typical Application 616.8.48 (TA-48) Intermediate Lane Closure – DE/CM & MT].		The workspace may be supplemented by channelizers and/or barricades placed perpendicular to the flow of traffic to deter non-construction related use of closed lanes. The longitudinal spacing and location of these devices are to be developed with the length of the closed lanes, work being performed and roadway characteristics in mind. For example, a longitudinal spacing of twice the normal sign spacing may be used for a paving operation on a limited access roadway, while the devices may be located upstream of a pavement repair area on the same type of facility. See [http://epg.modot.org/files/6/6d/616.8.48_MT.pdf Typical Application 616.8.48 (TA-48) Intermediate Lane Closure – DE/CM & MT].

	===616.3.6.2 Traffic Space===		===616.3.6.2 Traffic Space===
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	There are two types of AFADs:		There are two types of AFADs:

	:1. An AFAD (see [[616.5 Flagger Control (MUTCD Chapter 6E)#616.5.5 STOP/SLOW Automated Flagger Assistance Devices (MUTCD 6E.05)\|EPG 616.5.05]]) that uses a remotely controlled STOP/SLOW sign on either a trailer or a movable cart system to alternately control right-of-way.		:1. An AFAD (see [[616.5 Flagger Control (MUTCD Chapter 6E)#616.5.5 STOP/SLOW Automated Flagger Assistance Devices (MUTCD 6E.05)\|EPG 616.5.5]]) that uses a remotely controlled STOP/SLOW sign on either a trailer or a movable cart system to alternately control right-of-way.

	:2. An AFAD (see [[616.5 Flagger Control (MUTCD Chapter 6E)#616.5.6 Red/Yellow Lens Automated Flagger Assistance Devices (MUTCD 6E.06)\|EPG 616.5.6]]) that uses remotely controlled red and yellow lenses and a gate arm to alternately control right-of-way.		:2. An AFAD (see [[616.5 Flagger Control (MUTCD Chapter 6E)#616.5.6 Red/Yellow Lens Automated Flagger Assistance Devices (MUTCD 6E.06)\|EPG 616.5.6]]) that uses remotely controlled red and yellow lenses and a gate arm to alternately control right-of-way.

Smithk: Per TS, numerous minor clarifications

2020-06-25T14:02:39Z

Per TS, numerous minor clarifications

Show changes

Smithk: Per TS, in EPG 616.3.13, updated pilot car signage to use PILOT CAR IN USE WAIT & FOLLOW (GO20-4a)

2019-07-25T15:08:16Z

Per TS, in EPG 616.3.13, updated pilot car signage to use PILOT CAR IN USE WAIT & FOLLOW (GO20-4a)

← Older revision		Revision as of 10:08, 25 July 2019
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	'''Guidance.''' The pilot car should have the name of the contractor or contracting authority prominently displayed.		'''Guidance.''' The pilot car should have the name of the contractor or contracting authority prominently displayed.

	'''Standard.''' The PILOT CAR FOLLOW ME (G20-4) sign (see [[616.6 Temporary Traffic Control Zone Devices (MUTCD 6F)#616.6.58 PILOT CAR FOLLOW ME (GO20-4) and PILOT CAR IN USE WAIT & FOLLOW ~~(GO20-4a)~~ (MUTCD 6F.58)\|EPG 616.6.58]]) shall be mounted on the rear of the pilot vehicle.		'''Standard.''' The PILOT CAR FOLLOW ME (G20-4) sign (see [[616.6 Temporary Traffic Control Zone Devices (MUTCD 6F)#616.6.58 PILOT CAR FOLLOW ME (GO20-4) and PILOT CAR IN USE WAIT & FOLLOW (MUTCD 6F.58)\|EPG 616.6.58]]) shall be mounted on the rear of the pilot vehicle.

	A flagger shall be stationed on the approach to the activity area to control vehicular traffic until the pilot vehicle is available.		A flagger shall be stationed on the approach to the activity area to control vehicular traffic until the pilot vehicle is available.

	Pilot vehicles may be specified to supplement flaggers when the length of the one-lane, two-way operation exceeds one-half mile. In addition to the flagger sign series, a vehicle mounted G20-4 “Pilot Car Follow Me” sign and ~~PLEASE WAIT FOR~~ PILOT CAR (~~G20~~-4a) sign shall be used in pilot vehicle operations. The access control and signing for each side road located within the work area of the one-lane, two-way operation should be determined as discussed in [[#616.3.10.1 Side Roads within the Work Area for One-Lane, Two-Way Operations\|EPG 616.3.10.1]]. Where applicable, the signing sequence for the side road should be supplemented with the ~~PLEASE WAIT FOR~~ PILOT CAR (~~G20~~-4a) sign. Refer to [[media:616.2.6 One-Lane Two-way Operation Apr 2011a.pdf\|Fig. 616.2.6]], [[616.8 Typical Applications (MUTCD 6H)#616.8.1 Listing of Typical Applications\|Fig. 616.8.10 - MT]].		Pilot vehicles may be specified to supplement flaggers when the length of the one-lane, two-way operation exceeds one-half mile. In addition to the flagger sign series, a vehicle mounted G20-4 “Pilot Car Follow Me” sign and PILOT CAR IN USE WAIT & FOLLOW (GO20-4a) sign shall be used in pilot vehicle operations. The access control and signing for each side road located within the work area of the one-lane, two-way operation should be determined as discussed in [[#616.3.10.1 Side Roads within the Work Area for One-Lane, Two-Way Operations\|EPG 616.3.10.1]]. Where applicable, the signing sequence for the side road should be supplemented with the PILOT CAR IN USE WAIT & FOLLOW (GO20-4a) sign. Refer to [[media:616.2.6 One-Lane Two-way Operation Apr 2011a.pdf\|Fig. 616.2.6]], [[616.8 Typical Applications (MUTCD 6H)#616.8.1 Listing of Typical Applications\|Fig. 616.8.10 - MT]].

	When a pilot vehicle is used, traffic delays should be limited to 15 minutes. If the wait is longer, inform your supervisor and an additional pilot vehicle may be used to keep the delay time within the 15-minute limit.		When a pilot vehicle is used, traffic delays should be limited to 15 minutes. If the wait is longer, inform your supervisor and an additional pilot vehicle may be used to keep the delay time within the 15-minute limit.