The basic objective of each traffic control plan (TCP) is to permit the contractor to work within the public right of way efficiently and effectively while maintaining a safe, uniform flow of traffic. The construction work and the public traveling through the work zone in vehicles, bicycles or as pedestrians must be given equal consideration when developing a traffic control plan.

At TRENCH & TRAFFIC SUPPLY we have been developing TCP's since 2002. Our experienced staff is knowledgeable and trained on the latest regulations so that we can build the perfect plan for you based on your specific project needs. Once your plan is created in our CAD format it will be ready to submit to the appropriate agencies for a quick and guaranteed  approval.

"Each Traffic Control Plan shall be developed consistent with the Manual on Uniform Traffic Control Devices (MUTCD), as specified in the apropriate guidelines. The information included on a traffic control
plan will vary depending upon the complexity of the project, the volume of traffic affected and the
roadway geometrics where the construction is being performed. The TCP must clearly depict
the exact sequence of the construction operations, the construction to be performed, and the
traveled way that will be utilized by all movements of traffic during each phase of construction.
Multiple phases of construction will require a serarate TCP for each different construction phase".

Properly trained and certified Traffic Safety Personnel are an essential part of any construction staff. By having your employees officially trained and certified you are able to minimize costly incidents that can interrupt the completion of your project. At TRENCH & TRAFFIC SUPPLY we are able to offer you online training and certification through our online flagger website.

Below is a glossary of terms that should be recognized and are a componant of any sucessful flagger training:

Advance Warning – notification procedures that advise approaching motorists to transition from normal driving status to that required by the temporary emergency traffic control measures ahead of them.

Blocker Vehicle –
the initial on-scene emergency vehicle, preferably a fire apparatus, positioned on an angle to the lanes of traffic creating a physical barrier between upstream traffic and the work area. This includes using the vehicle to “block to the left” or “block to the right”.

Buffer Zone –
the empty, unoccupied space or distance between emergency responders and vehicles in the incident space and moving traffic.

Downstream –
the area past the incident in the direction of normal traffic flow as it travels away from the incident space.

Emergency Responder –
Fire, Police, EMS and any other personnel responding to assist at an emergency scene.

Incident –
any non-recurring event that causes a reduction of roadway capacity due to motor vehicle crashes, vehicle fires, natural disaster, or other unplanned event that affects or impedes the normal flow of traffic.

Incident Space –
the area that includes the incident, and the necessary space around the incident required to manage the event, including vehicles and personnel.

The Manual on Uniform Traffic Control Devices, published by the Federal Highway Administration (FHWA) under 23 Code of Federal Regulations (CFR), Part 655, Subpart F. The most current edition on the MUTCD can be found at

Shadow Vehicle –
the second due fire apparatus or other emergency responder vehicle, which positions upstream of the blocker vehicle at an angle, to create the beginning of the buffer zone.

Taper –
the action of merging several lanes of traffic into fewer lanes, utilizing traffic control devices. This action begins upstream of the shadow vehicle.

Temporary Incident Control Zone –
this zone extends from the first warning device to an area where the moving traffic returns to original traffic patterns and is clear of the incident. Consideration should be given to include the area which is part of the police

Transition Zone – the area/lane of roadway where approaching motorists change their speed and position to comply with the traffic control measures established at an incident scene.

Upstream – the area prior to the incident in the direction of normal traffic flow as the vehicles approach the temporary incident control zone.

At TRENCH & TRAFFIC SUPPLY we manufacture a large variety of signs in our own state of the art facility. We can produce signs in the following configurations:

12" x 24" to  48" x 96"
2 square ft. to 32 square ft.

12" x 12" to 48" x 48"
1 square ft. to 16 square ft.


Click HERE for the Cal Trans Sign Chart