Another Traffic Pattern Change to Occur NB I-25, RidgeGate to County Line

July 15, 2015 - Metro Denver Colorado/CDOT Region 1 - DENVER – Phase 4 of the I-25 Widening Project between RidgeGate Parkway and County Line Road is set to begin on Friday, July 17 with another northbound I-25 traffic shift.

This next shift will move all northbound I-25 traffic onto the new concrete pavement to make room for a temporary work zone between northbound and southbound I-25. This configuration will be in place for several months.

Crews will work overnight on Thursday, July 16 to move barrier wall and prepare northbound I-25 for the new configuration on Friday, July 17 by 5:30 a.m. The traffic shift will start at RidgeGate Parkway and continue through the County Line Road off-ramp. 

Motorists are encouraged to use extra attention when approaching the work zone from the south. The right lane of I-25 will be striped as an exit only lane at RidgeGate Parkway (exit 192). After this lane drop, three northbound I-25 lanes with auxiliary lanes will continue through the work zone. All northbound lanes will be together under this configuration unlike Phase 3, which split northbound traffic into two left lanes and two right lanes around a temporary work zone. Phase 3 has been in place for approximately three weeks.

The I-25 Widening Project will add an additional lane in each direction on I-25 from Lincoln Avenue to County Line Road, resulting in four lanes in each direction south of the C-470 / E-470 interchange. In addition to expanding capacity on I-25, crews will replace existing asphalt with concrete to better match the I-25 corridor. This project will improve the traffic patterns from and to all affected ramps as well as provide new pedestrian connections. Funded by CDOT, Douglas County, City of Lone Tree and the Denver Regional Council of Governments (DRCOG), this $32 million project is intended to be substantially complete by the end of 2015.

Updated information regarding this project is available by calling the project hotline (303) 358-7643 or visiting the website at For information on other projects, visit, call 511 or download CDOT mobile.