Show/Hide

The City of Boulder welcomes your feedback. Use our Inquire Boulder customer service tool to tell us what’s on your mind.

  • Transportation Division
  • Transportation Projects and Programs
  • Maintenance
  • Maps of the Transportation System
  • Transportation Master Plan
  • Airport
  • Transportation Safety
  • Great Options Boulder
  • Boards

30th and Colorado Underpass

Project Update

The project team is further exploring underpass concepts B and C and the potential for re-construction the 30th & Colorado intersection into a protected intersection.  This analysis is anticipated to wrap up in August.  Information on the results of that analysis will be shared with the public in September.

Be sure to sign up for the project email list (at the bottom of this page) to receive updates. 

 

Project Overview

The 30th & Colorado Bike and Pedestrian Underpass project will provide important safety, accessibility, mobility and drainage improvements to the intersection of 30th Street and Colorado Avenue. The project area is an important piece of the 30th & Colorado travel corridor for the Boulder community and the University of Colorado Boulder (CU). The existing intersection and at-grade crossings support high frequency transit service, provide important commuting connections for vehicle travel and connect the CU Boulder main and east campuses.

Today, the Average Daily Traffic through the project intersection ranges from 9,000 to almost 10,000 vehicles on Colorado Avenue and just over 21,000 vehicles on 30th Street. Each day, about 1,450 pedestrians and bicyclists (combined) pass through the 30th & Colorado intersection and more than 1,250 riders board and exit RTD and CU buses using the four stops at this intersection.

The Safe Streets Report (2016) found the 30th & Colorado intersection to be the top collision location within the city's street network, with 86 collisions occurring between 2012-2016, one involving a pedestrian and 18 involving a bicyclist. Additionally, the existing on-street bicycle facilities contribute to a high level of stress for some users, leading some bicyclists to ride on the sidewalks to navigate to and through this intersection. Bikes on sidewalks and in crosswalks moving against vehicle travel were indicated as a bicycle collision trend in the Safe Streets Report.

Looking to the future, the Boulder Valley Comprehensive Plan and the University of Colorado East Campus Master Plan forecast growth in the project area, which is expected to result in more people traveling through this intersection. The 30th & Colorado Underpass project will eliminate a barrier for university and community travel needs in this changing landscape.

Project Scope

The 30th & Colorado Bike and Pedestrian Underpass Project will construct a grade-separated crossing of both 30th Street and Colorado Avenue. The underpass will provide connections to the existing sidewalks, multi-use path and bicycle lanes; reconstruct the intersection with concrete; reconstruct and enhance the existing transit stops; install underpass lighting, landscaping and other urban designs; and install public art.

Existing Conditions

Funding

This $8 million project is funded by a $6 million federal Transportation Improvements Program (TIP) grant, $900,000 in state transportation funds and $1.1 million in City of Boulder transportation funds. The TIP is distributed every four years by the Denver Regional Council of Governments (DRCOG), in cooperation with the Colorado Department of Transportation (CDOT) and the Regional Transportation District (RTD). 

Timeline

Project planning and design began in 2017 and will continue to spring 2018.  Final design will be completed in winter 2018 followed by construction in spring 2019. Construction is currently anticipated to take about one year to complete.

Public Involvement

Feedback received through the public process will be incorporated into the project design, where feasible. 

Previous Public Engagement

  • 30th & Colorado Corridors Study Open House, Sept. 25, 2017. 
    • Review the information presented at this open house  here pdf
      • Read a summary of the comments received at the September 2017 open house here pdf
  • ​​30th & Colorado Corridors Study Open House, Feb. 7, 2018
    • Review the information presented at this open house  here pdf
    • Read a summary of the comments received at the September 2017 open house here pdf
  • ​University of Colorado, Boulder Main and East Campus Outreach, review the information presented at this event  here pdfRead a summary of the comments received  here pdf
    • Sustainability Summit, CU Boulder, April 25, 2018
    • University of Colorado Engineering Council finals week tabling event, CU Boulder East Campus, May 1, 2018
  • ​​30th & Colorado Corridors Study Open House, May 3, 2018
    • Review the information presented at this open house  here pdf
    • Read a summary of the comments received at the September 2017 open house here pdf
  • ​National Federation of the Blind, Boulder Chapter, May 12, 2018
    • Review the information presented  here pdf
    • Read a summary of the comments from the National Federation of the Blind, Boulder chapter here pdf
  • ​Community  Cycles Advocacy Committee, May 14, 2018
    • Review the information presented  here pdf
    • Read a summary of the comments received from the Advocacy Committee here pdf
  • ​Center for People with Disabilities, May 21, 2018
    • Review the information presented  here pdf
    • Read a summary of the comments received from CPWD here pdf
  • ​BeHeard Boulder, May 3, 2018 to June 1, 2018
    • Review the information presented  here pdf
    • Read a summary of the comments received through BeHeard Boulder here pdf
  • ​Transportation Advisory Board, July 9, 2018 
    • Review the information presented  here pdf
  • University of Colorado Design Review Board, July 12, 2018
    • Review the information presented  here pdf

Contact

Contact Melanie Sloan, Transportation Division, at 303-441-4934. 

Or comment on the 30th & Colorado Bike and Pedestrian Underpass project. You don't need to register, and comments can be submitted through the "Make a Service Request for Transportation Projects" button.

Sign up for email updates

Email Address:
  

View Full Site