616.9 Temporary Traffic Control Zone Guide Signs (MUTCD Chapter 6I)
616.9.1 Guide Signs – General (MUTCD Section 6I.01)
Support. Guide signs along highways provide road users with information to help them along their way through the TTC zone. The design of guide signs is presented in EPG 903.
The letter “O” is added to the TTC sign designation of MO and EO to represent the color orange, which provides a separate nomenclature from the permanent guide signs.
Guidance. The following guide signs should be used in TTC zones as needed:
- A. Standard route markings where temporary route changes are necessary,
- B. Directional signs and street name signs, and
- C. Special guide signs relating to the condition or work being done.
Standard. If additional temporary guide signs are used in TTC zones, they shall have a black legend and border on a fluorescent orange background.
Option. Guide signs used in TTC incident management situations may have a black legend and border on a fluorescent pink background.
When temporary directional signs and temporary street name signs are used in conjunction with detour routing, these signs may have a black legend and border on fluorescent orange background.
When permanent directional signs or permanent street name signs are used in conjunction with detour signing, they may have a white legend on a green background (see EPG 903.4.31 and EPG 903.4.40).
Standard. The sizes for TTC guide signs shall be as shown in Standard Plan 616.10.
616.9.2 Detour Signs and Plaques (MO4-8P, MO4-8a, MO4-9, MO4-9a, MO4-9b, MO4-9c, and MO4-10) (MUTCD Section 6I.02)
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Standard. Each detour shall be adequately marked with standard temporary route signs and destination signs.
Guidance. Where city streets, county roads and other public roads are detoured due to roadwork, detour signing should be provided showing the name or number of the road being detoured. Detour signing should be provided at each junction through the detour route as well as confirmation signs where there are long detour sections over the same route.
Detour Route Assemblies should only be installed on the route being detoured. Detour signing should be used along the detour route to guide road users through the detour. Detour Route Assemblies should not be used with temporary bypasses or connections unless part of or the entire route is on other existing roadways.
Support. Additional information is located in EPG 616.2.9 Detours and Diversions.
TA-8 and TA-9 show a typical detour of a road closed beyond the junction.
Option. Detour signs in TTC incident management situations may have a black legend and border on a fluorescent pink background.
The Detour Arrow (MO4-10) sign may be used where a detour route has been established.
The DETOUR (MO4-8P) plaque may be mounted at the top of a route sign assembly to mark a temporary route that detours from a highway, bypasses a section closed by a TTC zone, and rejoins the highway beyond the TTC zone.
Guidance. The Detour Arrow (MO4-10) sign should normally be mounted just below the ROAD CLOSED (R11-2, R11-3a, or R11-4) sign. The Detour Arrow sign should include a horizontal arrow pointed to the right or left as required.
The DETOUR (MO4-9) sign should be used for unnumbered highways, for emergency situations, for periods of short durations, or where, over relatively short distances, road users are guided along the detour and back to the desired highway without route signs.
A Street Name sign should be placed above, or the street name should be incorporated into, a DETOUR (MO4-9) sign to indicate the name of the street being detoured.
Option. The END DETOUR (MO4-8a) sign may be used to indicate that the detour has ended.
Guidance. When the END DETOUR sign is used on a numbered highway, the sign should be mounted above a route sign after the downstream end of the detour.
The Pedestrian/Bicyclist Detour (MO4-9a) sign should be used where a pedestrian/bicyclist detour route has been established because of the closing of a pedestrian/bicycle facility to through traffic.
Standard. If used, the Pedestrian/Bicyclist Detour sign shall have an arrow pointing in the appropriate direction.
Option. The arrow on a Pedestrian/Bicyclist Detour sign may be on the sign face or on a supplemental plaque.
The Pedestrian Detour (MO4-9b) sign or Bicyclist Detour (MO4-9c) sign may be used where a pedestrian or a bicyclist detour route (not both) has been established because of the closing of the pedestrian or bicycle facility to through traffic.
616.9.3 EXIT CLOSED Panel (MUTCD Section 6I.03)
Guidance. When an exit ramp is closed, an EXIT CLOSED sign panel with a black legend and border on a fluorescent orange background should be placed diagonally across the interchange/intersection guide signs.
616.9.4 WORK ZONE NO PHONE ZONE Sign
Support. The WORK ZONE NO PHONE ZONE sign is designed to capture the traveling public’s expectation that cellular phone and other distracting device usage is not allowed within the project limits.
Guidance. The WORK ZONE NO PHONE ZONE sign should be used on all contract projects unless the roadway is closed to traffic or the construction has no effect on existing roadways. One WORK ZONE NO PHONE ZONE sign should be placed a minimum of 500 ft. before the ROAD WORK AHEAD sign. On two-lane undivided roadways, only one NO PHONE ZONE sign should be used for each direction of traffic affected by the project.
Option. District Engineers have discretion whether to use this sign on mobile and short-term projects, such as contract leveling course.
Support. See Standard Plan 616.10 for sign layout.
616.9.5 Project Information Sign
Support. The Project Information sign provides the traveling public the finished date of the project as promised by MoDOT.
Guidance. The Project Information sign should be used on projects deemed prominent by the district. One sign should be placed in each direction of traffic on state highways. This sign should not be used on roadways that are closed to traffic or where the construction has no effect on existing roadways.
The Project Information sign should be placed in a visible area within the project’s limits provided its placement does not disrupt a sequence of signs (e.g., between ROAD WORK AHEAD, RIGHT LANE CLOSED AHEAD and RIGHT LANE CLOSED).
Option. If a visible location within the project is not available, this sign may be placed approximately 500 ft. before the GO20-1 ROAD WORK NEXT XX MILES sign.
Support. Because of the sign’s width, flatter areas are preferable in order to avoid long post lengths in fill sections.
See EPG 903.8.9 for additional information regarding Project Information signs.
The designer should complete the D-28 form and submit it to the Central Office Highway Safety and Traffic Division where it will be detailed. The finished layout will be returned to the designer for inclusion in the traffic control plans. The options available to the designer to describe the project are listed below. Any deviations from this list must be approved by the Public Information and Outreach Unit.
The options available for project completion date on the sign are Spring, Summer, Fall, or Winter along with the year. |