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28th Street Improvements Project

28th Street is a gateway to Boulder for employees, visitors, students, and residents. When the 28th Street Improvements Project is completed, 28th Street will be transformed into a multimodal corridor with unique transportation, safety, aesthetic and economic enhancements.

These improvements have been funded with a number of sources, including city transportation funds, state transportation funds, federal transportation funds and the 2011 voter-approved Capital Improvement Bond.

South Section

The south section of the 28th Street Improvements (coined "Hello Boulder") extends from Baseline Road to Arapahoe Avenue. Project construction has been divided into phases. Phases 1 and 2 were completed by fall 2006 and included new bike lanes, transit superstops, improved roadway lighting, and construction of a sidewalk on the east side of the 28th Street Frontage Road.   Phase 3 was completed at the end of 2012 and included the construction of a multi-use path along the west side of 28th Street from Colorado Avenue to Baseline Road. 

Middle Section

This section extends from Arapahoe Avenue to Pearl Parkway and includes a multi-use path on the west side of 28th Street from Arapahoe to Valmont Road.  Construction is anticipated to begin in 2013.

North Section

Improvements to the north section of 28th Street (Pearl to Iris) will include:

  • a bus/bike/right-turn only lane in each direction along 28th Street;
  • mid-block pedestrian crossings, signals and raised crossings;
  • more bus stops and new bus services; and
  • raised crossings at some intersections.

Left-turn lanes were added on 28th Street at the intersections of Pearl Street, Valmont Road, and Iris Avenue.

A bond-funded project to provide a multi-use path on the west side of 28th Street from Arapahoe Avenue to Valmont Road is part of this section (and also the Middle Section).  Construction is anticipated to begin in 2013. 

 28th Street logo template

Planning and design of the 28th Street (Iris-Yarmouth) Multi-Use Path and On-street Bike Facility Improvements has begun and construction is anticipated to begin in fall 2014.  The scope of project improvements include:

  • Addition of a 10 foot-wide multi-use path on the west side of 28th Street (Iris Ave to Fourmile Canyon Creek);
  • New bike and pedestrian bridge over Fourmile Canyon Creek;
  • Provide a continuous on-street bike facility on 28th Street (from Iris to Yarmouth Avenues)including widening the roadway bridge at Fourmile Canyon Creek.

The 28th Street (Iris to Yarmouth Avenues) Bicycle and Pedestrian Improvements project is being reviewed through the city's Community and Environmental Assessment Process (CEAP). A public hearing was held at the May 13, 2013 Transportation Advisory Board (TAB) meeting and the board recommended approval of the project CEAP and recommended design options. The CEAP document was forwarded to City Council for potential call-up by July 16, 2013. If the CEAP is not called up at that time, the project will move forward to the final design phase.

For questions or additional information about this project, please contact  This e-mail address is being protected from spambots. You need JavaScript enabled to view it  at 303-441-3266.

Project Goals

New Gateway with “Smart” Aesthetics
28th Street is transforming into an attractive and appealing gateway that combines functional art, water-wise landscaping, and improved signage and landmarks. 

Improved Transportation (Complete Streets)
The multimodal transportation system increases safety to better accommodate travel for motorists, bus riders, bicyclists and pedestrians.

Expanded Travel Options
The improvements provide roadway enhancements, better lighting, improved transit stops, and expanded bus services, bike lanes, sidewalks, and multi-use paths. 

Retaining Wall with "Strata Variations"
The retaining wall between Colorado Avenue and Taft Drive was built to stabilize the hillside and the "Strata Variations" public art was incorporated into the retaining wall.

Water-wise Landscaping
Drought-resistant landscaping such as fertile grasses, shrubbery and trees requires little maintenance. The new irrigation system and wood mulch dramatically reduce water loss, surface runoff and weed growth. This system is designed to allow the city to selectively irrigate portions of the landscaping in possible drought conditions.

Regional Connections
28th Street links CU, the Twenty Ninth Street retail district, the Boulder Junction area, local and regional transit routes, bus transit superstops, and FasTracks. The improvements strengthen multimodal travel throughout the region.

Economic Vitality
The new 28th Street encourages private investments by improving access to businesses and adding value to existing ventures such as the Twenty Ninth Street retail district.

The Boulder Convention & Visitors Bureau has put up colorful banners to encourage people to shop, dine and enjoy their time in our city. CU’s 28th Street Landscape Development Master Plan calls for enhancements on its eastern boundary, which include new outdoor basketball courts with sunken bleacher seating and possibly flower gardens. 

Leveraged Funds
More than 50 percent of the funding for the south section improvements came from state and federal sources and the rest came from the city’s transportation fund.

The upcoming improvements along the Arapahoe Avenue to Valmont Road section of 28th Street is a combination of Capital Improvement Bond funding and city transportation funding. The improvements on 28th Street/US 36 (Iris-Yarmouth) are a combination of federal and city transportation funding.

pdfProject Manager Article


Contact

For more information, contact This e-mail address is being protected from spambots. You need JavaScript enabled to view it at 303-441-3266.

For up-to-date information on traffic impacts, review the weekly Cone Zones construction traffic report.

Sign up for the "28th Street reconstruction" email news group.

Before and After Photos


Created with Admarket's flickrSLiDR.