Most drivers have figured out the old radar camera trick — spot the sign, tap the brakes, cruise past at legal speed, then floor it again. Colorado just closed that loophole permanently on one of its busiest stretches of highway.
Starting this month, eight cameras spread across roughly six miles of I-25 are calculating your average speed — not your speed at a single frozen moment. That changes the entire dynamic of speed enforcement, and it’s already working in ways that traditional cameras never could.
How the system works — and why it’s nearly impossible to beat
The cameras are positioned near mile markers 244.3, 245.9, 247.5, and 249.4 along the I-25 North Express Lanes construction zone between Mead and Berthoud. Each camera photographs and time-stamps your vehicle as you pass. The system then calculates how long it took you to travel between those points and converts that into an average speed.
If that average comes out more than 10 mph above the posted 65 mph limit — so, 76 mph or higher — the registered owner receives a $75 civil penalty by mail. Slowing to 64 mph for a few hundred feet before each camera and then accelerating back to 85 mph will not help. The math catches up to you regardless.
The warning phase already produced a 90% drop in speeders
CDOT launched a warning-only period beginning March 1, 2026, before transitioning to live enforcement. During that window, the agency mailed more than 4,100 warning notices to drivers who would have qualified for a fine under the real rules. The result was striking — excessive speeding in the corridor dropped by 90 percent almost immediately.
That kind of behavioral shift is rare with traditional fixed cameras, where drivers quickly learn the exact location and game the system. Average-speed enforcement removes the exploit entirely. You either drive under the threshold for the full six miles, or you pay.
What the fine actually means for your license and insurance
| Detail | Specifics |
|---|---|
| Fine amount | $75 civil penalty |
| Trigger threshold | More than 10 mph over 65 mph (76 mph+) |
| Monitored distance | Approx. 6 miles, mile markers 244–249 |
| Number of cameras | 8 total, both directions |
| License points added | None — civil penalty only |
| Insurance impact | Likely none (civil, not moving violation) |
| Construction zone active through | 2028 |
| Warning signs posted | At least 300 feet before monitored area |
Here’s what matters most to everyday drivers: this is a civil penalty, not a moving violation. No points hit your license. Your insurance company is unlikely to see it at all. It functions more like a parking ticket than a speeding conviction in the traditional sense.
That said, some drivers in other states have chosen to ignore similar civil camera fines, betting that enforcement won’t follow. Colorado has not yet detailed exactly how it will pursue non-payment, and that ambiguity may embolden a segment of drivers to roll the dice on the $75.
The bigger picture behind Colorado’s enforcement push
The work zone between Colorado 56 and Colorado 66 is an active construction site through 2028. Crews are widening shoulders, rebuilding bridges, straightening sections of highway, and constructing new express lanes — all while traffic continues to flow at highway speeds around them.
CDOT Chief Engineer Keith Stefanik was direct about the intent: “The goal isn’t to punish drivers; it’s to prevent crashes before they happen.” That’s not just a sound bite. Work zones concentrate risk in a specific corridor for years at a time, and speed differentials between vehicles and construction crews are a leading cause of fatalities. A 90% drop in excessive speeding during the warning period suggests this system might actually be achieving what traditional enforcement rarely does — changing behavior rather than just generating revenue.
Average-speed camera systems have been deployed in the UK and across parts of Europe for over a decade with documented reductions in both speeding and crash rates. Colorado is one of the earlier U.S. states to apply the model at scale on an active interstate. Virginia drivers triggered speed cameras nearly a million times under a different enforcement model, suggesting American drivers are still adjusting to camera-based enforcement in ways that European drivers largely have not.
The cameras are not hidden or disguised. Warning signs are posted at least 300 feet before the monitored zone. CDOT has been transparent about the camera locations right down to the mile markers. The system is designed to change your behavior in the moment — not catch you off guard six miles later when the envelope arrives.
If you drive I-25 between Mead and Berthoud regularly, the math is simple: keep your speed under 76 mph for the duration of the construction zone and you will not receive a fine. Set your cruise control, stay consistent, and treat the next two years of construction like the extended work zone it is. The $75 isn’t the real cost — the real cost is what happens when a construction worker doesn’t make it home because someone couldn’t hold 70 mph for six miles.
