616.24 Quality Standards for Temporary Traffic Control Devices - Revision history

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

2026-01-07T17:37:14Z

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

Hoskir: Hoskir moved page 616.19 Quality Standards for Temporary Traffic Control Devices to 616.24 Quality Standards for Temporary Traffic Control Devices: renumbered and renamed due to MUTCD Update (See Special Ballot)

2026-01-07T17:31:02Z

Hoskir moved page 616.19 Quality Standards for Temporary Traffic Control Devices to 616.24 Quality Standards for Temporary Traffic Control Devices: renumbered and renamed due to MUTCD Update (See Special Ballot)

← Older revision	Revision as of 12:31, 7 January 2026
(No difference)

Hoskir: updated per RR4049 and also removed the out of date easily printable version but replaced it by selecting ctrl+P

2025-05-13T14:52:14Z

updated per RR4049 and also removed the out of date easily printable version but replaced it by selecting ctrl+P

← Older revision		Revision as of 09:52, 13 May 2025
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	*[https://epg.modot.org/forms/general_files/TS/Quality_Standards_for_Temporary_Traffic_Control_Devices_flyer.pdf '''Quality Standards for Temporary Traffic Control Devices'''] (This Work Zone flyer shows the top deficient Temporary Traffic Control Devices)		*[https://epg.modot.org/forms/general_files/TS/Quality_Standards_for_Temporary_Traffic_Control_Devices_flyer.pdf '''Quality Standards for Temporary Traffic Control Devices'''] (This Work Zone flyer shows the top deficient Temporary Traffic Control Devices)
	----		----
	*~~[https://epg.modot.org/forms/general_files/TS/Quality_Standards_for_Temporary_Traffic_Control_Devices.pdf '''Easily Printable Version~~ of Quality Standards for Temporary Traffic Control Devices''']		*Create a printable version of Quality Standards for Temporary Traffic Control Devices by selecting '''CTRL+P''' keys
	</div>		</div>

Hoskir: /* 616.19.2.2.2 Sign, Flag and AWRS Quality */ updated per RR3997

2025-04-11T19:33:30Z

616.19.2.2.2 Sign, Flag and AWRS Quality: updated per RR3997

← Older revision		Revision as of 14:33, 11 April 2025
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	'''Picture 16''' shows a stub higher than the 2-inches maximum and the bolt should be bolted through the two posts.		'''Picture 16''' shows a stub higher than the 2-inches maximum and the bolt should be bolted through the two posts.

	===616.19.2.2.2 ~~[[616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.17_Position_of_Advance_Warning_Signs_.28MUTCD_6F.17.29\|~~Sign~~]], [[616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.2.2_Flags_and_Advance_Warning_Rail_System_on_Signs\|~~Flag ~~and AWRS~~ Quality]]===		===616.19.2.2.2 Sign and Flag Quality===
	<gallery widths=250px heights=250px position="right" style="text-align:center; font-weight:bold; margin-left:0em" caption="Acceptable Examples">		<gallery widths=250px heights=250px position="right" style="text-align:center; font-weight:bold; margin-left:0em" caption="Acceptable Examples">
	File:616.19.2.2.2_01.jpg\|(1)		File:616.19.2.2.2_01.jpg\|(1)
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	File:616.19.2.2.2_13.jpg\|(13)		File:616.19.2.2.2_13.jpg\|(13)
	</gallery>		</gallery>
	'''Pictures 10 - 13''' are examples of unacceptable nighttime visibility. Proper storing, transporting, and covering signs is crucial to minimizing deficiencies.		'''Pictures 10 - 13''' are examples of unacceptable nighttime visibility. Proper storing, transporting, and covering signs is crucial to minimizing deficiencies.

	~~<gallery widths=250px heights=250px position="right" style="text-align:center; font-weight:bold; margin-left:0em" caption="Acceptable Examples">~~
	~~File:616.19.2.2.2_14.jpg\|(14)~~
	~~File:616.19.2.2.2_15.jpg\|(15)~~
	~~File:616.19.2.2.2_16.jpg\|(16)~~
	~~</gallery>~~
	Advance Warning Rail System (AWRS) shall be installed on the first advance warning sign (Road/Bridge Work Ahead) on long-term stationary projects. The barricade stripes shall slope downward toward the roadway as shown above. '''Picture 14''' is an example of acceptable AWRS installations. When a Type 3 Barricade is used with a sign as shown '''Picture 15''', the barricade shall be located between 7 to 10 feet from the sign (to be crashworthy). Either a 4-foot or 8-foot barricade may be used. A 4 foot AWRS on single post is acceptable as shown in '''Picture 16''' provided the signpost has been sized to accommodate the added weight and square footage of the AWRS.

	===616.19.2.2.3 [[616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.16_Warning_Sign_Function.2C_Design_and_Application_.28MUTCD_6F.16.29\|Proper Sign Color]]===		===616.19.2.2.3 [[616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.16_Warning_Sign_Function.2C_Design_and_Application_.28MUTCD_6F.16.29\|Proper Sign Color]]===

Hoskir: updated per RR3853

2024-05-01T13:19:23Z

updated per RR3853

Show changes

Legged1: /* 616.19.2.2.6 Sign Placement and Installation */ PSST maximum stub height

2022-09-01T18:49:27Z

616.19.2.2.6 Sign Placement and Installation: PSST maximum stub height

← Older revision		Revision as of 13:49, 1 September 2022
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	\|}		\|}

	Pictures 13 and 14 shows proper installation of a PSST post. The PSST post does not have to use the corner bolt but can be bolted either with one or two straight bolts. However, the corner bolt minimizes movement of the post within the tubes. Picture 15 shows a stub higher than the 2 in. maximum and the bolt should be bolted through the two posts. Note: Missouri One-Call should always be notified prior to installing any sign post into the ground.		Pictures 13 and 14 shows proper installation of a PSST post. The PSST post does not have to use the corner bolt but can be bolted either with one or two straight bolts. However, the corner bolt minimizes movement of the post within the tubes. Picture 15 shows a stub higher than the 2.5" maximum and the bolt should be bolted through the two posts. Note: Missouri One-Call should always be notified prior to installing any sign post into the ground.

	[[image:616.19.2.2.6 16.jpg\|center\|300px]]		[[image:616.19.2.2.6 16.jpg\|center\|300px]]

Hallej1: CM- remove warning lights

2022-07-20T19:11:51Z

CM- remove warning lights

← Older revision		Revision as of 14:11, 20 July 2022
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	There are many factors that ensure the success of these functions; the placement and condition of each TTCD are two important factors. TTCDs that are worn, damaged or improperly installed will significantly lower the overall quality of a work zone. Clean, legible, properly installed TTCDs will command the respect of road users.		There are many factors that ensure the success of these functions; the placement and condition of each TTCD are two important factors. TTCDs that are worn, damaged or improperly installed will significantly lower the overall quality of a work zone. Clean, legible, properly installed TTCDs will command the respect of road users.

	These quality standards are intended as a resource to determine if TTCDs are meeting current traffic needs in terms of legibility, visibility and other safety and mobility requirements for TTCDs (e.g., impact attenuators, truck-mounted attenuators, signs, channelizers, barricades~~, warning lights~~, changeable message signs, flashing arrow panels, work zone traffic signals, lighting units, temporary pavement marking, temporary traffic barrier, etc.) deployed on the state highway system. Effective application of these quality standards will benefit everyone that works in or navigates through work zones on the state highway system.		These quality standards are intended as a resource to determine if TTCDs are meeting current traffic needs in terms of legibility, visibility and other safety and mobility requirements for TTCDs (e.g., impact attenuators, truck-mounted attenuators, signs, channelizers, barricades, changeable message signs, flashing arrow panels, work zone traffic signals, lighting units, temporary pavement marking, temporary traffic barrier, etc.) deployed on the state highway system. Effective application of these quality standards will benefit everyone that works in or navigates through work zones on the state highway system.

	==616.19.1 Quality Requirements==		==616.19.1 Quality Requirements==
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	[[image:616.19.2.3 1.jpg\|center\|950px]]		[[image:616.19.2.3 1.jpg\|center\|950px]]

	Trim-line channelizers shown in Pictures 1 and 2 are the most commonly used work zone channelizer. Picture 3 shows channelizers with sequential lights on a nighttime interstate project~~. Warning lights on all channelizers, except cones, may be used as provided in the EPG and the Standard Plans~~. Picture 4 shows a drum-like channelizer. Trim-line and drum-like channelizers are commonly ballasted with weights called “rings”, which prevent the channelizers from being blown over by vehicles. Stacking of ballasts may be considered if it meets manufacturer’s recommendations for crashworthiness.		Trim-line channelizers shown in Pictures 1 and 2 are the most commonly used work zone channelizer. Picture 3 shows channelizers with sequential lights on a nighttime interstate project. Picture 4 shows a drum-like channelizer. Trim-line and drum-like channelizers are commonly ballasted with weights called “rings”, which prevent the channelizers from being blown over by vehicles. Stacking of ballasts may be considered if it meets manufacturer’s recommendations for crashworthiness.

	[[image:616.19.2.3 5.jpg\|center\|870px]]		[[image:616.19.2.3 5.jpg\|center\|870px]]
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	[[image:616.19.2.4 3.jpg\|center\|850px\|thumb\|<center>'''Unacceptable Examples'''</center>]]		[[image:616.19.2.4 3.jpg\|center\|850px\|thumb\|<center>'''Unacceptable Examples'''</center>]]

	Picture 3 shows a barricade installation located after the private entrance and before the bridge end. Notice how close the equipment is to the barricade, which creates a potential safety issue for workers and motorists should a vehicle crash through the barricade. Sites should be reviewed for the best location to store equipment/materials within the work area. For this example, the opposite end of the bridge had ample room to store equipment and worker vehicles. Picture 4 shows acceptable sheeting quality for nighttime use but notice the left barricade stripes are angling to the left instead of to the right. On full roadway closure, the stripes should slope into the Road Closed sign as shown in Pictures 1 and 2. ~~Warning lights on barricades are optional as noted in the EPG and Standard Plans.~~		Picture 3 shows a barricade installation located after the private entrance and before the bridge end. Notice how close the equipment is to the barricade, which creates a potential safety issue for workers and motorists should a vehicle crash through the barricade. Sites should be reviewed for the best location to store equipment/materials within the work area. For this example, the opposite end of the bridge had ample room to store equipment and worker vehicles. Picture 4 shows acceptable sheeting quality for nighttime use but notice the left barricade stripes are angling to the left instead of to the right. On full roadway closure, the stripes should slope into the Road Closed sign as shown in Pictures 1 and 2.

	[[image:616.19.2.4 5.jpg\|center\|800px]]		[[image:616.19.2.4 5.jpg\|center\|800px]]

Smithk: /* 616.19.2.15 Traffic Management */

2022-04-19T15:15:17Z

616.19.2.15 Traffic Management

← Older revision		Revision as of 10:15, 19 April 2022
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	Traffic Management is an inclusive term for the overall implementation and management of the work zone. Is the work zone providing a safe traveling experience for the public and a safe work area for the workers, providing the traveling public adequate and early information, and is it minimizing traffic delays?		Traffic Management is an inclusive term for the overall implementation and management of the work zone. Is the work zone providing a safe traveling experience for the public and a safe work area for the workers, providing the traveling public adequate and early information, and is it minimizing traffic delays?

	To provide adequate traffic management many tools are available which includes but not ~~inclusive~~ to the following: signs, channelizing devices, changeable and dynamic message signs, intelligent transportation systems (ITS), detours, law enforcement, flagging operation, etc.		To provide adequate traffic management many tools are available which includes but not limited to the following: signs, channelizing devices, changeable and dynamic message signs, intelligent transportation systems (ITS), detours, law enforcement, flagging operation, etc.

	[[616.13 Work Zone Capacity, Queue and Travel Delay\|EPG 616.13 Work Zone Capacity, Queue and Travel Delay]] and [[616.14 Work Zone Safety and Mobility Policy\|EPG 616.14 Work Zone Safety and Mobility Policy]] have additional information for traffic management policies and tools.		[[616.13 Work Zone Capacity, Queue and Travel Delay\|EPG 616.13 Work Zone Capacity, Queue and Travel Delay]] and [[616.14 Work Zone Safety and Mobility Policy\|EPG 616.14 Work Zone Safety and Mobility Policy]] have additional information for traffic management policies and tools.

Smithk: /* 616.19.2.7 Changeable Message Sign/Flashing Arrow Panels/Traffic Signals */ Per DE and TS, guidance now reflects that the use of non-MASH 2016 temporary traffic control devices barriers is being discontinued. All temporary traffic control devices on a project must be NCHRP 350 or MASH 2016 Test Level 3 compliant.

2022-04-19T15:12:32Z

616.19.2.7 Changeable Message Sign/Flashing Arrow Panels/Traffic Signals: Per DE and TS, guidance now reflects that the use of non-MASH 2016 temporary traffic control devices barriers is being discontinued. All temporary traffic control devices on a project must be NCHRP 350 or MASH 2016 Test Level 3 compliant.

← Older revision		Revision as of 10:12, 19 April 2022
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	===616.19.2.7 [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 Sign]/[https://epg.modot.org/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.61_Arrow_Boards_.28MUTCD_6F.61.29 Flashing Arrow Panels]/[https://epg.modot.org/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.84_Temporary_Traffic_Control_Signals_.28MUTCD_6F.84.29 Traffic Signals]===		===616.19.2.7 [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 Sign]/[https://epg.modot.org/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.61_Arrow_Boards_.28MUTCD_6F.61.29 Flashing Arrow Panels]/[https://epg.modot.org/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.84_Temporary_Traffic_Control_Signals_.28MUTCD_6F.84.29 Traffic Signals]===

	Trailer mounted devices such as changeable message signs (CMS), flashing arrow panels (FAP), portable traffic signals and work area lighting are considered NCHRP 350 ~~Category 4~~ (see below).		Trailer mounted devices such as changeable message signs (CMS), flashing arrow panels (FAP), portable traffic signals and work area lighting are considered FHWA Category 4 devices for both NCHRP 350 and MASH 2016 (see below).

	FHWA Explanation of Category ~~IV (~~4)		'''FHWA Explanation of Category 4'''
	Category IV devices are devices which have proven to have significant value in the work zone by contributing to safer traffic operation though these devices may cause great harm to occupants of impacting vehicles. We believe that, as currently configured and deployed, these devices provide a net benefit to motorists. Substantial crash experience to date shows that crashes with these devices are rare. They have been identified by FHWA as portable, usually trailer-mounted, devices such as area lighting supports, flashing arrow panels, temporary traffic signals, and changeable message signs which are often used in or adjacent to the traveled way. The AASHTO / FHWA agreement calls for these devices to be studied and an implementation date announced by October 1, 2000. We would not expect to identify any new category IV devices unless they have a proven substantial operational benefit.
			Category 4 devices are devices which have proven to have significant value in the work zone by contributing to safer traffic operation though these devices may cause great harm to occupants of impacting vehicles. We believe that, as currently configured and deployed, these devices provide a net benefit to motorists. Substantial crash experience to date shows that crashes with these devices are rare. They have been identified by FHWA as portable, usually trailer-mounted, devices such as area lighting supports, flashing arrow panels, temporary traffic signals, and changeable message signs which are often used in or adjacent to the traveled way.

	[[image:616.19.2.7 1.jpg\|center\|950px]]		[[image:616.19.2.7 1.jpg\|center\|950px]]
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	Picture 12 shows a permanent sign blocking the CMS. In Picture 13, the truck should not be placed in front of the CMS board. For Picture 13, the speed limit message is just a reminder of the speed limit. A temporary sign should be used instead, and the CMS removed. Actual enforcement of the speed limit requires a regulatory sign.		Picture 12 shows a permanent sign blocking the CMS. In Picture 13, the truck should not be placed in front of the CMS board. For Picture 13, the speed limit message is just a reminder of the speed limit. A temporary sign should be used instead, and the CMS removed. Actual enforcement of the speed limit requires a regulatory sign.

	===[https://epg.modot.org/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.81_Lighting_Devices_.28MUTCD_6F.81.29 616.19.2.8 Lighting]===		===[https://epg.modot.org/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_%28MUTCD_6F%29#616.6.81_Lighting_Devices_.28MUTCD_6F.81.29 616.19.2.8 Lighting]===

Smithk: Per TS, deleted archaic "Work Zone Inspection Sheet"

2022-02-25T14:41:03Z

Per TS, deleted archaic "Work Zone Inspection Sheet"

← Older revision		Revision as of 09:41, 25 February 2022
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	\|-		\|-
	\|[[media:616.19 Inspection Worksheet 2017.docx\|Temporary Traffic Control Inspection Worksheet]]		\|[[media:616.19 Inspection Worksheet 2017.docx\|Temporary Traffic Control Inspection Worksheet]]
	\|-
	~~\|[http://wwwi/intranet/tr/ttc/documents/TTC_Inspection_Worksheet.htm Work Zone Inspection Sheet]~~
	\|-		\|-
	\|<sup>'''_________'''</sup>		\|<sup>'''_________'''</sup>