A Colorado Express Lane violation is a $75 civil penalty mailed to the registered owner of a vehicle that crossed a solid white or double white lane line to enter or exit an Express Lane, instead of using a designated dashed-line access point. The cameras that catch it are run by the Colorado Department of Transportation on most Front Range and I-70 mountain corridors, and the fine doubles to $150 if you don’t act within 20 days.
What Triggers the Fine
The rule the cameras enforce is simple. Enter and exit the Express Lane only where the boundary line is dashed. Cross a solid white or double white line anywhere else and the system records a weaving violation, whether or not you have a valid toll transponder. The state treats the crossing as both a safety violation and a failed toll transaction, because the system can’t register a proper toll when a driver skips the designated access points.
Using the Express Lane to pass a slower car and then cutting back out is the most common way drivers get hit. The cameras don’t read intent. If your vehicle crosses the solid line, the capture happens.
The 20-Day Clock and What a Lapse Costs
Every weaving violation is $75 if paid within 20 days of the notice date. After 20 days, it becomes $150.
Ignoring the notice is where it gets expensive. Under CRS 43-4-808, if you don’t pay or respond within 30 days of the notice date, the state can enter a default judgment, add collection fees, and place a hold on your vehicle registration. Once that hold is on, you can’t renew your registration until the debt is cleared, and driving on a suspended registration is a much larger problem than the original $75. This is the main reason the notice shouldn’t sit in a drawer.
These are civil penalties, not criminal citations. They don’t add points to your Colorado driving record and don’t appear as moving violations. Because insurers typically price off points and moving-violation history, a weaving fine on its own shouldn’t push your rate up. The registration hold is the consequence that actually bites.
How to Pay
The Colorado Transportation Investment Office handles payment through ExpressLaneSafety.com. You’ll need the notice number and license plate information to pull up the violation. If you’ve lost the notice, the portal has a guest-pay option that uses just the plate number and state.
You can also pay by phone at (800) 343-2633. Phone support runs Monday through Friday, 7:30 a.m. to 5:30 p.m. Mountain Time, and Saturdays from 9 a.m. to 1 p.m.
How to Dispute a Violation
If the violation looks wrong — wrong plate, vehicle already sold, something else you can document — you can dispute it at ExpressLaneSafety.com by entering your notice number and selecting the dispute option. Upload your supporting documentation and submit before the deadline printed on the notice.
After review, CTIO may dismiss the penalty. If it doesn’t, you can request a hearing before an independent hearing officer by the date in the follow-up email. The hearing officer decides only two questions: whether the violation actually occurred, and whether you were the registered owner at the time. The officer can’t lower the fine, waive the penalty, or arrange a payment plan. If the officer finds you liable, a $30 adjudication fee gets added to the balance.
Two things to know before you dispute. First, once a violation has been paid or sent to collections, the hearing right is gone. If you plan to contest it, do that before paying. Second, no source confirms that filing a dispute pauses the 20-day payment deadline, so move quickly to avoid the fine doubling while you wait for a decision.
Where the Cameras Actually Operate
Automated enforcement doesn’t cover every Express Lane mile. As of mid-2026, cameras are active on these corridors:
- I-70 Mountain, Idaho Springs to Empire — active since July 2023
- C-470, I-25 to Wadsworth Boulevard — active since September 2023
- I-25 North, US 36 to E-470 — active since September 2023
- Central 70, I-25 to Chambers Road — active since January 2025
- I-25 South Gap, Monument to Castle Rock — active since January 2025
- I-25 North, Berthoud to Fort Collins — active since May 2026
The 30-day warning period CDOT ran on the Central 70 and I-25 South Gap corridors before January 2025 produced more than 23,000 warning letters for weaving. That grace window is closed. Every active corridor now issues fines on the first capture.
If You Miss Your Exit
Access points can be spaced several miles apart, and the dashed-line segments where crossing is legal are short. If you realize you’ve passed your exit, stay in the Express Lane until the next dashed segment rather than cutting across the solid line. Waiting a few more minutes costs nothing. Crossing the solid line costs $75, or $150 if the notice sits unopened.