To report a traffic signal intersection that is entirely DARK or FLASHING outside of business hours (Monday through Thursday, 8:00 a.m. to 5:00 p.m.), please call the Jefferson County Sheriff’s Office at 303-980-7300.
To report a traffic signal concern within unincorporated Jefferson County during business hours, contact the Jefferson County Transportation and Engineering Division at 303-271-8495 or submit an online service request.
The county must perform an engineering study to determine whether new traffic signals are warranted based on traffic volumes, speeds and available “gaps” in traffic for turning vehicles. Specifications for traffic signals are in the Manual on Uniform Traffic Control Devices (MUTCD). See the MUTCD website. A new traffic signal costs approximately $400,000, so its installation must be considered carefully.
To learn more about traffic signals, see Frequently Asked Questions.