How many traffic control contractors are licensed in California?

California has 470 contractors with a C31 (Traffic Control) license from the Contractors State License Board. 455 (97%) hold active licenses. SiteVetter checks each against SAM.gov, OSHA, DOL, and EPA databases.

What does a C31 license cover in California?

A California C31 license covers construction zone traffic control contractors. Any contractor performing traffic control work valued at $500 or more must hold this license. The CSLB issues and regulates all contractor licenses in the state.

What percentage of traffic control contractors have federal violations?

15.5% of California traffic control contractors (73 out of 470) have at least one record in federal databases. These include SAM.gov debarments, DOL wage violations, OSHA safety citations, and EPA environmental violations.

Verify Traffic Control Contractors (C31) - Page 6 | CSLB + Federal Check

How to Verify a Traffic Control Contractor (C31) in California

California requires all contractors performing traffic control work valued at $500+ to hold a valid CSLB C31 license. Of the 470 licensed traffic control contractors in the state, 97% currently hold active licenses and 15.5% have at least one federal compliance record.

Manual vetting takes 45+ minutes per contractor and routinely misses violations in databases most people don't know to check. SiteVetter runs CSLB status, SAM.gov debarment, DOL wage violations, OSHA safety citations, and EPA environmental records in seconds—creating a timestamped compliance artifact.

Verification Checklist for Traffic Control Contractors

Verify the contractor license is active and in good standing
Request proof of insurance and bonding
Get at least 3 written quotes before selecting a contractor
Check federal databases: SAM.gov, OSHA, DOL, and EPA records
Confirm bond: California requires $25,000+ contractor bond (SB 607)

Why Verification Matters for Traffic Control Work

Under California's "Controlling Employer" doctrine, general contractors face liability for subcontractor safety violations. For traffic control work specifically, 15.5% of licensed contractors have federal records that a standard CSLB license check wouldn't reveal. SiteVetter's 5-database check catches what a single-source verification misses.

Traffic Control Contractor Verification - Page 6

About C31 License

Traffic Control Contractors

How to Verify a Traffic Control Contractor (C31) in California

Verification Checklist for Traffic Control Contractors

Why Verification Matters for Traffic Control Work