Drivers caught speeding through a construction zone on I-25 in northern Colorado have just a few weeks left in a grace period before fines begin arriving by mail.
In January, the Colorado Department of Transportation installed automated speed cameras along a stretch of I-25 between Mead and Berthoud, where crews are building new express lanes as part of the state’s speed enforcement program.
Since March 1, drivers going more than 10 miles per hour over the posted 65-mph speed limit have been sent warning notices in the mail. That grace period ends April 2nd. After that, violations will carry a $75 fine, though they won’t add points to your driver’s license.
The new Automated Vehicle Identification System or AVIS, works by measuring how long it takes a vehicle to travel between two cameras placed along the corridor. This function allows the cameras to calculate a driver’s average speed through the construction zone and determine whether they were going over the limit.
CDOT says during testing of the cameras, more than 10% of drivers exceeded the speed limit by at least 10 mph.
The automated cameras are meant to curb speeding, which remains a major cause of crashes. Preliminary data from a 2025 CDOT survey shows there were more than 1,200 speeding-related crashes in Colorado in 2025, resulting in 91 total fatalities.
The state authorized the use of automated speed enforcement in 2023. The cameras on this stretch of I-25 will become the second active corridor in Colorado’s automated speed enforcement program, which first launched last year on Highway 119 between Golden and Longmont. Speeding violations there have since dropped by more than 80%.
