It is illegal to idle a parked vehicle for more than 5 minutes in the City of Aspen. (City Ordinance section 13.08.110 (PDF)). It is also illegal to leave a vehicle running for any amount of time while it is unattended according to state law.
Report and Idling Vehicle
Citizens may report idling vehicles by calling our office at 970-920-5039. The following information is necessary for a warning or citation to be issued:
identify yourself
provide your contact information
provide information regarding your observations
To report an "idling-in-progress" within Aspen City limits during business hours please provide:
Company name (if a commercial vehicle)
Vehicle description
Date
Time
License plate number
Location
Idling at Construction Sites
If you are concerned about an idling vehicle on a construction site, please contact a Construction Mitigation Officer in the City of Aspen Engineering Department at 970-920-5080.