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Do you commute north on I-25? Watch for new ramp metering

CDOT testing pilot ramp metering system on northbound I-25 between Ridgegate Parkway and University Boulevard

Posted on January 28, 2022 2022Transportation


From the Colorado Department of Transportation

CDOT is testing a new ramp metering system on northbound I-25 between Ridgegate Parkway and University Boulevard, with the goal of reducing congestion.

Motorists may notice a difference in the timing of the lights when they approach the ramp meters.  The signals are updated in real time based on actual traffic conditions every 20 seconds to better control the flow of traffic entering northbound I-25.  This is expected to result in faster travel times on northbound I-25. The project team is closely monitoring the new system and making adjustments and improvements as needed.

Most of the ramps continue to have two ramp metering signal lights, but there are some ramps that have an additional signal.  Three new signals have been installed at the westbound Lincoln Avenue, Dry Creek Road and westbound Arapahoe Road on-ramps to northbound I-25.  The right shoulder lanes can be used on these ramps when the ramp metering signals are on.

Watch the video on how the new ramp metering system works.

In February, this new ramp metering system will be extended to I-225, C-470 and E-470 on-ramps to northbound I-25.  Stay tuned for updates. The system will be closely evaluated.  If results show traffic conditions improve, permanent deployment is possible.

This system has worked successfully in Melbourne, Australia, resulting in reduced congestion, improved travel time reliability, reduced crashes and reduced emissions.

For more information, visit CDOT’s website.

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