C-31 · Earthwork & concrete

Construction Zone Traffic Control Contractor

482 contractors hold a California C-31 Construction Zone Traffic Control Contractor license

What Does a C-31 License Cover?

Prepares or removes lane closures, flagging, or traffic diversions using portable devices such as cones, delineators, barricades, sign stands, flashing beacons, arrow trailers, and changeable message signs on roadways.

Hiring a Construction Zone Traffic Control Contractor

Before hiring, verify the contractor's license is active and that they carry current workers' compensation insurance and a contractor bond. California law requires a written contract for home improvement projects over $500. Get at least three written estimates and check references before making a decision.

A California contractor license is generally required when a project costs $1,000 or more in combined labor and materials, requires a building permit, or uses additional workers. Small jobs cannot be split from a larger project to qualify for the exemption. Read the CSLB requirements.

Also in Earthwork & concrete

C-8: Concrete Contractor C-12: Earthwork and Paving Contractor C-29: Masonry Contractor

Related Classifications

C-32: Parking and Highway Improvement Contractor

Licensing Resources

Deposit and payment rules for California contracts
Home improvement contract requirements
How to verify a contractor license

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C-31 Contractors by City

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