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Construction of 30th Street and Colorado Avenue Bicycle and Pedestrian Underpasses Begins March 1

Work to require lane closures over next 18 months  

Beginning March 1 and lasting for approximately 18 months, travelers can anticipate delays at the 30th Street and Colorado Avenue intersection as crews construct two new bicycle and pedestrian underpasses and install additional intersection safety enhancements.

Traffic impacts will vary by phase of work but will generally require traffic on 30th Street and Colorado Avenue to be reduced to one lane of travel in each direction near the intersection with left-turning lanes remaining open. Vehicles are encouraged to seek alternative routes during this time. The Bound and Buff Bus transit routes will remain active during construction, but transit stop locations may be temporarily relocated for safe access. On-site signage will indicate relocated bus stops as well as detour routes for pedestrians and bicyclists. More information on traffic impacts is available on www.BoulderConeZones.net .

In addition to the construction of the new underpasses, which will provide safer north-south and east-west crossings of the intersection for pedestrians and bicyclists, the project will improve connections to existing sidewalks, bike lanes and multi-use paths; reconstruct or relocate existing transit stops; and install underpass lighting, landscaping, art and other urban design features. The project will also construct the first fully protected intersection in the city, which is an intersection that separates turning bicycles and cars and features corner refuge islands to slow turning vehicles and improve safety and comfort for crossing pedestrians and bicyclists.

The 30th Street and Colorado Avenue area is an important travel corridor for the Boulder community and the University of Colorado Boulder. It is one of the busiest intersections in the city and supports high-frequency transit service, provides important commuting connections for vehicle travel, and connects CU Boulder’s main and east campuses. The intersection was identified in the city’s 2016 Vision Zero Boulder: Safe Streets Report as one of the top collision locations within the city’s street network, with 86 collisions occurring between 2012-2016 and 18 involving a bicyclist.

The City of Boulder has partnered with CU Boulder on the project, with the university contributing $2.4 million and a land donation valued at $800,000. The Boulder Valley Comprehensive Plan forecasts growth in the project area, which is expected to result in more people traveling through this intersection. The 30th and Colorado Bicycle and Pedestrian Underpass Project will eliminate a barrier for university and community travel needs in this changing landscape.

“We’re excited to partner with CU on this important project that will improve safety for all users at one of the busiest intersections in the city,” said Erika Vandenbrande, director of the Transportation & Mobility Department. "The new underpasses and protected intersection improvements will enhance multimodal access and help our community make progress toward our Vision Zero goal of eliminating all fatalities and serious injuries caused by traffic crashes.”

 “The university is delighted to see this project come to fruition with new and invaluable safety and access features at such a key intersection,” said CU Boulder Senior Strategic Advisor Frances Draper. “Partnering on projects like this enables the university and the city to more effectively create benefits for our mutual community.”  

The total project cost is estimated at $15.9 million, with $11.15 million provided by city and CU Boulder funds and $4.75 million in federal  Transportation Improvements Program  (TIP) funds approved by the Denver Regional Council of Governments (DRCOG) and administered by the Colorado Department of Transportation (CDOT).

The design of the underpass and intersection safety improvements were finalized through collaboration with CU Boulder and a multi-year community engagement process. Construction is anticipated to be completed in fall 2022.

More information about the 30th and Colorado Bicycle and Pedestrian Underpass Project can be found at https://bouldercolorado.gov/transportation/30th-and-colorado-underpass . Learn more about Vision Zero at https://bouldercolorado.gov/transportation/vision-zero .

Published: March 1, 2021 

Media Contact:  

Samantha Glavin, Media Relations, 720-667-9480