Actuated signals sense traffic

Signal indications are not of fixed length but can change in response to variations in traffic demand. They frequently are used where traffic volumes fluctuate widely or where interruptions to the major street flow must be minimized. Video cameras, radar and loops are examples of the tool that notifies the signal to change. Colorado Department of Transportation (CDOT) has two actuated signals, located on Highway 86 at Fifth Street and at Enderud Boulevard.

Actuated-coordinated signals are programmed

Signals that are pre-programmed are called actuated-coordinated signals, meaning the side streets and primary-street left turn lanes have variable green times, depending on the amount of traffic passing through.

For example, Wolfensberger Road is set to receive at least a certain amount of green time, depending on traffic and the time of day. Green time limits are set for side streets, such as Park Street, so the priority remains on the main thoroughfare. The signals for side streets have cameras that detect when a car approaches, and the signal changes accordingly. There is a maximum amount of green time allotted to side-street traffic.

The signals on Meadows and Founders parkways, on U.S. Highway 85, and at the interchanges with Interstate 25 are run this way. CDOT uses four signal timing presets for these signals:

• Morning peak
• Mid-day peak
• Afternoon peak
• Weekend peak

Signal timing

Considering the level of growth and changing traffic patterns in and around Castle Rock, the Town and CDOT have regular discussions and reviews on traffic operations and share ideas on how both entities can improve the system. This collaboration is aimed at providing better customer service and enhancing safety and efficiency.

Contact us

If you have questions please email us or call 303-814-6415.