What Is a Traffic Control Plan?
A traffic control plan (TCP), also called a temporary traffic control plan, is the approved drawing that shows how vehicles, pedestrians, and bicycles are guided through or around a work zone in each phase. It typically shows advance warning, transitions, the activity area, buffers, and device placement.
Last reviewed: June 24, 2026
Why It Matters
The approved plan is the standard the field setup is measured against, so a setup that does not match it is not compliant.
A clear, complete plan turns intent into a buildable, enforceable work zone.
Where It Shows Up in the Field
The TCP is the document the crew builds from and the inspector checks against; the current approved version should be on site.
On larger projects it may be part of a broader transportation management plan.
Common Mistakes
- Building a setup that does not match the approved plan.
- Using an outdated plan revision after conditions changed.
- Not having the plan available on site.
What to Check Before Work Begins
- That the field setup matches the current approved plan.
- That any changes went through revision and re-approval.
- That the plan on site is the latest approved version.
Related Terms
Related Pages
Frequently Asked Questions
What is a traffic control plan?
It is the approved blueprint showing how road users are guided safely through or around a work zone in each phase, including advance warning, transitions, the activity area, and buffers. The field setup is expected to match it.
Who approves a traffic control plan?
The governing agency that owns the road reviews and approves the plan, often as part of the permit. Requirements for what the plan must show come from that agency and the applicable standards.
Need a project-specific traffic control plan?
Work Zone Compliance is an educational resource. Public Ready supports traffic control plan (TCP) preparation, agency corrections, permit readiness, and coordination across Southern California.
Request Traffic Control Plan Support