Civil penalties for speeding violations will begin Jan. 12 on Colorado Highway 119 in Boulder County.

The Colorado Department of Transportation will issue $75 penalties to drivers who exceed the speed limit by 10 mph or more in the work zone between Boulder and Longmont. Automated cameras will capture violations and mail notices to registered vehicle owners.

The change follows a warning period that started in July. CDOT has issued 34,050 warning notices since the program launched, according to a department statement.

High speeds in the corridor have dropped more than 80% since enforcement began, the statement said. Average speeds now range from 53 mph to 56 mph, according to the statement.

“Average speeds starkly decreasing on CO 119 means the Colorado Speed Enforcement Program is already doing its job to increase safety in the corridor,” said CDOT Chief Engineer Keith Stefanik in a statement. “Civil penalties are meant to curb the behavior of speeding drivers, not punish them. By moderating speed, we can save lives — plain and simple.”

Work zone crashes statewide caused 532 injuries in 2025, down nearly 12% from 602 in 2024, the agency said in the statement. Eight work zone fatalities occurred in 2025, a 73% decrease from 30 the previous year, according to the department.

The program uses automated vehicle identification systems in high-risk corridors owned by CDOT. Violations carry civil penalties only. Owners have 45 days to pay or dispute notices at coloradospeedenforcement.com, the department said.

Enforcement targets the CO 119 Safety, Mobility and Bikeway Project. Construction started in September 2024 and continues through 2027, according to CDOT.

Since the Colorado Speed Enforcement Program launched on Highway 119, between Boulder and Longmont, there has been an 80% decrease in speeding within the work zone.