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Licensed traffic control contractors in Southern California
Every CSLB C-31 license with a business address in Los Angeles, Orange, San Diego, Riverside or San Bernardino County, from CSLB data updated 10/22/2026.
By county
Los Angeles County has the most, 62 of 193 (32.1%).
| County | Licenses | Active | Share of SoCal |
|---|---|---|---|
| Los Angeles County | 62 | 61 | 32.1% |
| San Diego County | 40 | 40 | 20.7% |
| Riverside County | 31 | 30 | 16.1% |
| Orange County | 30 | 30 | 15.5% |
| San Bernardino County | 30 | 28 | 15.5% |
Construction Zone Traffic Control (C-31) by city
- Corona 12
- San Diego 7
- Chino 6
- Riverside 6
- Long Beach 6
- El Cajon 5
- Orange 5
- Ramona 5
- Montclair 5
- Huntington Beach 4
- Santa Ana 4
- Lakeside 4
- San Bernardino 4
- Escondido 4
- Garden Grove 3
- Pasadena 3
- Santa Fe Springs 3
- Lancaster 3
- Sylmar 3
- Anaheim 3
- Lake Elsinore 3
- Los Angeles 3
- Vista 3
- Fallbrook 2
- Valencia 2
- Chula Vista 2
- Panorama City 2
- Brea 2
- Rancho Cucamonga 2
- Buena Park 2
- Moreno Valley 2
- Bloomington 2
- Winnetka 2
- Stanton 2
- Santee 2
- Temecula 2
- Compton 2
- Gardena 2
- Pomona 2
- Ontario 2
- Woodland Hills 2
- Los Alamitos 2
- Montebello 2
- Yucaipa 2
- Rosemead 2
- Cerritos 1
- Redondo Beach 1
- Azusa 1
- Glendale 1
- Pico Rivera 1
- Valley Center 1
- Poway 1
- Wrightwood 1
- Oak Hills 1
- Perris 1
- Pacoima 1
- Lawndale 1
- Menifee 1
No new licenses for Construction Zone Traffic Control (C-31) across SoCal
None issued Oct 16 – Oct 22, 2026.
Quick facts
How many licensed traffic control contractors are in Southern California?
193 traffic control contractors with a California CSLB license list a business address in Southern California. 189 of them have an active license in good standing (CSLB data as of 10/22/2026).
How many traffic control contractors in Southern California have a license problem right now?
4 are not in good standing right now, including 3 suspended for missing workers' comp. 11 active licenses expire within 90 days. Each county and city list linked here shows the status and a plain-English OK-to-hire verdict.
How do I check if a traffic control contractor is licensed?
Search the business name or license number on LicenseWatch CA to see license status, bond and workers' comp in one place, then confirm on the CSLB website before you sign a contract. In California, work over $1,000 in labor and materials requires a licensed contractor.
New and lapsed SoCal licenses, every Monday
New licenses, expirations and workers' comp lapses across five counties. One short email a week.