Pedestrian Tunnel to the RTD Wagon Road Park-n-Ride Closures

THORNTON—From 5 a.m. Monday, April 3 to 5 p.m. Wednesday, April 5, the pedestrian tunnel to the RTD Wagon Road Park-n-Ride will be closed as part of the North I-25 Express Lanes: 120th Avenue to Northwest Parkway/E-470 project. 

Thornton Pedestrian Tunnel Closure

The closures will be in place 24 hours a day. Detour routes will be posted and are listed below.

An additional six-week closure of the pedestrian tunnel will be required in mid-April through May. Dates are subject to change due to weather conditions.


  • Westbound: To access the trail from westbound Community Center Drive, travel north to Grant Street, west to 120th Avenue, and south to Delaware Street and rejoin the trail at the RTD Wagon Road Park-n-Ride.
  • Eastbound: To access the trail from the RTD Wagon Road Park-n-Ride, travel north to Delaware Street, west to 120th Avenue and south to Grant Street to rejoin northbound I-25.


The North I-25 Express Lanes project from 120th Avenue to Northwest Parkway/E-470 is a $97.5 million project that will improve safety, capacity and user choice to a rapidly developing region.

This project will continue the previous Express Lanes project, which was completed on I-25 between US 36 and 120th Avenue, and will extend the Express Lanes to Northwest Parkway/E-470. The project will add capacity on I-25 up to Northwest Parkway/E-470 and construct a new asphalt surface from 120th Avenue to Colorado Highway 7. Motorists can expect the roadway to be in its final alignment by winter 2018. 

Construction will take place from 7 a.m. - 4:30 p.m., Monday through Friday, with periodic night and weekend work. Motorists can expect various lane closures on both northbound and southbound I-25 as well as periodic ramp closures. Traffic will be maintained during peak travel times throughout construction.

CDOT, Hamon Infrastructure, the City of Westminster, the City and County of Broomfield, the City of Northglenn, the City of Thornton and Adams County would like to thank motorists for their patience during construction and remind drivers to slow down in the cone zone.

About Express Lanes:

Express Lanes increase roadway capacity and help to manage congestion on the highways. The use of toll pricing during peak travel times reduces delays, manages congestion and maintains reliable travel times.Express Lanes currently are open between 120th Avenue and US 36 on North I-25 and, US 36 from Denver to Boulder and on the I-70 Mountain Express Lane. For more information, visit the Express Lanes website. To get an ExpressToll account and pass, visit the ExpressToll website.

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