812 - Temporary Traffic Control for Construction Zone Operations

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Temporary Traffic Control for Construction Zone Operations


-Update in Progress-

Freeway Work Zone Design Guidance

MDOT has established the following guidance on lane and shoulder widths when designing a 3R/4R freeway work zone. Any alterations in the MOT during construction must take this into consideration along with consultation with Design and Traffic & Safety staff, prior to modification of the work zone design.


3R/4R freeway Projects should have a minimum 11 foot lane, and any shoulder next to an open ditch should be at least 2 feet paved with 1 foot aggregate to the hinge point. If the open ditch shoulder width is equal to or less than the above dimensions, delineation devices as detailed in SOA 2013-001 Work Zone Safety Tools for Narrow Shoulders must be utilized.

In addition, a 1 foot minimum, 2 foot optimal shy distance from the edge line to the temporary traffic control device should be maintained.

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Solar Board Inspection Checklist

Form 1013S, Inspectors Checklist for Solar Boards, may be used when inspecting Lighted Arrow, Type B and C arrow boards on construction projects.

The requirements for Lighted Arrow, Type B and C are described in Subsection 922.06 of the Standard Specifications for Construction.

If the form is utilized, inspectors need to verify all the information listed on Form 1013S and attach the form to the respective Inspectors Daily Report.

The form is available on MDOT’s form webpage.

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Traffic Control During Special Marking Construction

These procedures apply to annual pavement marking contracts and acceptable methods of traffic control during special pavement marking removal and installation at intersections.

The State/Industry Construction Zone Review Team and Michigan State Police determined that working outside of the marked traffic lane closure during a traffic signal’s red indication is an acceptable work method, provided the following:

  1. Construction is considered short duration, as defined by the current edition of the Michigan Manual on Uniform Traffic Control Devices, Section 6G.02.MMUTCD.pdf
  2. The contractor does not impede the flow of traffic beyond the existing traffic controls.
  3. The contractor works within the confines of the red indication only, is back in the closure or on the curb, and outside of the traveled way when the traffic signal changes to a green indication.

The use of hand signals is not permitted as a secondary measure of temporary traffic control when working outside of the established closure. The contractors are subject to the same rules and regulations as all other pedestrians when outside the closure during a red traffic signal indication.

If the contractor is found working in the open lane on a green traffic signal indication, the allowance of working in the open lane on a red traffic signal indication should be discontinued.

Construction staff should use the Special Provision for Maintaining Traffic to prohibit working during a red traffic signal indication for a particular location, locations, or corridors. Region and TSC wide restrictions that prohibit working on a red indication are not recommended.

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