Full closure of 30th and Colorado intersection slated for Sept. 10–23

From Saturday, Sept 10, to Friday, Sept. 23, the intersection of 30th Street and Colorado will be closed in all directions to pedestrians, bicyclists and vehicles as the city’s transformative underpass project progresses. Community members are encouraged to avoid this area during this closure period.

The planned closure is part of ongoing work on the 30th Street and Colorado Avenue Underpass Project. The roadwork is planned to minimize the impact on students, faculty, staff and visitors.

View the project detour map for various pedestrian, bicycle and alternate vehicular routes while the work is being performed. Crews will be completing scheduled work that cannot be done with live traffic.

The project is a critical part of the city’s Core Arterial Network (CAN) effort and also aligns with CU Boulder and city planning efforts such as CU Boulder Master Plan (2021) and CU Transportation Master Plan (2020). These strategic efforts identified the need for improvements to safety, separation of travel, and reduction in conflict points and severe crashes at the intersection.

In addition to improving campus and community connectivity, the underpass will provide drainage and structural improvements. The project is scheduled for completion in early 2023.

Buff Bus impacts

Members of our CU Boulder community who are commuting from East Campus can still use the Stampede Bus, though construction delays on the route are likely and the route will be detoured during non-peak hours. The regular Route S - Stampede will continue to operate from 7 a.m. to 5 p.m. (approximately 15 minutes between buses). After 5 p.m., the Stampede will be following detoured route S.

Residents from Williams Village can continue to use Buff Bus detour route WL. The detour route will run on the regular schedule: Monday–Friday, 7 a.m.–3 p.m. (approx. 12 mins between buses). After 3 p.m., detour Route W will provide service.

For more details about bus schedule impacts and route detour map, visit our Buff Bus webpage.

Questions about the city’s 30th and Colorado Underpass project can be sent to popen@bouldercolorado.gov.