What Is an Approved Traffic Control Plan?
An approved traffic control plan is the version of the plan that an agency has reviewed and accepted, reflecting any comments or corrections. It shows how traffic, pedestrians, and the work area will be managed. The approved plan is the version the field setup is expected to match.
Last reviewed: June 24, 2026
Why It Matters
The approved plan is the reference an inspector uses to confirm the field setup is allowed. Building to an unapproved or outdated version is a frequent source of corrections.
Because plans can be revised, keeping the current approved version on hand avoids working from the wrong one.
Where It Shows Up in the Field
The approved plan applies for the life of the work and is referenced during inspections. It underlies setups on Caltrans, county, and city projects alike.
In the field, crews keep the approved plan available and build the setup to match it.
Common Mistakes
- Working from a draft or superseded version of the plan.
- Building a setup that differs from the approved layout.
- Not having the approved plan available on site.
- Ignoring conditions noted on the approved plan.
What to Check Before Work Begins
- That the plan on site is the current approved version.
- That the field setup matches the approved layout.
- That any plan revisions have been incorporated.
- That the plan is accessible for inspection.
Related Terms
Related Pages
Frequently Asked Questions
What makes a traffic control plan 'approved'?
It is approved once the governing agency has reviewed it and accepted it, including any required corrections. The approved version is the one the field setup must match.
What if the field setup does not match the approved plan?
A mismatch is a common reason for corrections or a stop-work situation during an inspection. The setup is expected to follow the approved plan.
Should the approved plan be on site?
Yes. Keeping the current approved plan available on site lets crews build to it and lets inspectors confirm the setup quickly.
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.
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