CDOT Express Lane — HOV Exemption & ExpressToll Account Mode Errors
I-25 Central, US-36, C-470, and I-70 Mountain Express Lanes use the ExpressToll system. Vehicles with Switchable HOV transponders set to 'HOV3+' (or HOV2 on US-36) are exempt from tolls. Common errors: (a) transponder mode left on 'TOLL' but vehicle had qualifying occupants — challenge with photographic / receipt evidence; (b) transponder in metallic windshield section not read — request gantry confidence; (c) toll posted at wrong rate — CRS 43-4-808 requires variable-rate display in advance.
Legal basis
CRS 43-4-803 to 43-4-816; CDOT High Performance Transportation Enterprise rules
Sample appeal wording
ExpressToll Customer Service P.O. Box 5470, Denver CO 80217 RE: Trip [DATE/TIME] / Plate [PLATE] I dispute the toll(s) and any late fee(s). The trip was HOV-eligible but my switchable transponder was [not read / set to TOLL while occupants qualified]. Evidence: [dashcam clip / 3 occupant affidavits / ride-share receipt timestamps]. Request: vacate toll(s); refund any late fees; correct account. [NAME] / [DATE]
Replace [PARKING DATE], [NtK DATE] etc. with your own dates before sending.
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Scan my ticketSources
- CDOT HPTE — https://www.codot.gov/programs/hpte
- ExpressToll — https://www.expresstoll.com
- CRS 43-4-808