Project Overview

The East Arapahoe Transportation Plan is a long-range plan that will consider a number of potential transportation improvements within the East Arapahoe corridor, including biking and walking enhancements, Bus Rapid Transit (BRT) and local bus service and automobile travel.


The purpose of the plan is to:

  • Address existing & future transportation needs, including local and regional travel.
  • Facilitate safe travel & access by people using all modes – walking, biking, accessing transit, and driving.
  • Support existing & future land use in the corridor.

Latest News

On Wednesday, August 29, 2018, the Boulder City Council voted unanimously to accept the East Arapahoe Transportation Plan. The next phases of the plan include finalizing corridor design and refining cost estimates as the city continues to pursue funding with regional partners and make progress toward conducting shorter-term localized improvements in the corridor.

For more information, contact Jean Sanson, Senior Transportation Planner.

Recommended Alternative

Based on input from the CWG, TAB and broader community feedback, staff is recommending Alternative 3, which includes:

  • Maintaining two general purpose lanes in each direction throughout most of the corridor,
  • Repurposing the existing curbside general-purpose travel lanes to accommodate a combination of Bus Rapid Transit (BRT), High Occupancy Vehicles (HOV), right-turning vehicles, and new shared technologies such as autonomous/connected vehicles, and
  • Pedestrian and bicycle improvements including an off-street multiuse path and raised protected bike lanes.

This alternative is expected to decrease future travel times for all commuters, maintain auto travel time and provide a transit travel time competitive with the automobile. It is also expected to create greater visibility for cyclists and more separation from general traffic, increasing access and comfort for all people walking and bicycling.

Setting the long-range vision (Recommended Alternative) for the East Arapahoe corridor is the first step in a multi-year journey. Implementing the vision and advancing regional mobility improvements along the length of SH 7 between downtown Boulder and I-25/Brighton will be a long-term project for the City of Boulder and key local and regional partners. It will involve continued community outreach and engagement through each step.

East Arapahoe recommended options

Recommended Alternative

This recommendation is supported by the results of the Evaluation of Alternatives Summary Report.

Evaluation Results Appendix A-H

Final Plan Now Available

Final East Arapahoe Transportation Plan and following appendices:

Appendix A - Existing Conditions

Appendix B - Purpose and Goals

Appendix C - Evaluation of Alternatives

Appendix C - Evaluation of Alternatives (Attachments)

Appendix D - Additional Vision Elements

Appendix E - Detailed Action Plan

Frequently Asked Questions

Frequently Asked Questions about the East Arapahoe Transportation Plan

Public Input

View the latest, Summary of Public Input, for the period of November 2015 - June 2018.

Community Working Group Statement of Findings

On Feb. 16, 2018, the CWG released a Statement of Findings that supports the recommended alternative.

Key Findings

Pedestrian Comfort and Safety

The Recommended Alternative would increase pedestrian comfort and safety throughout the corridor, with the largest improvements between approximately Foothills Parkway and Westview Drive. In this stretch of the corridor, a planned 12-foot multi-use path with an adjacent 17 to 18-foot amenity zone and bicycle facility acting as a buffer, as well as lower traffic speeds, would contribute to a higher level of pedestrian comfort than today.

Bicycle Comfort and Safety

Along the corridor, off-street bicycle facilities would provide a higher level of comfort and safety for people on bicycles than on-street facilities. A tradeoff with shared multi-use paths is the potential for increased conflicts between bicyclists and pedestrians, and between autos and bicycles crossing driveways in the opposite direction as traffic.

Traffic Safety and Congestion Impacts

With implementation of side-running BRT, high-capacity transit service is forecast to maintain or reduce daily traffic in the corridor by as much as 3,700 vehicles per day. In the recommended alternative, the peak hour LOS, a measure of delay at major intersections, would typically be the same as today, except at Foothills where the PM peak LOS would be degraded. By contrast, in the No Build Alternative, the PM peak hour Level of Service would typically degrade by one to two letter grades, from C to D or E. All the Build Alternatives include roadway design features providing safety benefits to drivers.

Auto Travel Time

The Recommended Alternative, which includes lane repurposing, would reduce through auto capacity at intersections. However, because BRT ridership would reduce auto traffic, a balancing effect on travel time is achieved. In the No Build Alternative, future auto travel times are projected to increase with increasing traffic and congestion. For example, a typical auto trip between US 287 in Lafayette and Boulder Community Health takes approximately 14 minutes today in the AM peak hour and would take an additional 3 minutes in 2040 in the No Build Alternative. With implementation of the Recommended Alternative, this travel time is expected to remain at between 17 and 18 minutes in 2040.

Transit Travel Time and Reliability

The Recommended Alternative would reduce the transit travel time in the corridor compared to driving in the peak hour/peak direction. A typical transit trip between Lafayette and Boulder Community Health takes 18 minutes today in the AM peak hour and would take 19 minutes in 2040 with the No Build Alternative. The Recommended Alternative would reduce this transit trip time to 14-15 minutes, providing shorter travel times than auto travel.

Transit Ridership and Cost-Effectiveness

Current ridership on the JUMP is approximately 2,400 daily boardings. With implementation of the Recommended Alternative, ridership is projected to increase to between 7,000 and 10,000 daily boardings. This ridership estimate is between Downtown Boulder and Brighton and include both regional BRT and local bus service in the corridor.

Travel Mode Share

The Recommended Alternative would reduce auto mode share and increase pedestrian, transit and bicycle mode share, moving the city closer to its TMP goal of reducing single occupant vehicle travel to 20 percent of all trips for residents and to 60 percent of work trips for non-residents. As an example, for trips on Arapahoe at 30th Street, 94 percent of all trips are made in autos today. In 2040 with the Recommended Alternative, the auto mode share is reduced to 82 percent, the share of trips made by people walking or biking increases from 2 percent to 6 percent, and transit trips increase from 5 percent to between 10-12 percent of all trips.

Streetscape Quality

The Recommended Alternative would designate a larger percentage of public right-of-way to streetscape features than the No Build Alternative. For example, within the segment of the corridor between Foothills Parkway and Westview Drive, 75 percent of the right-of-way is currently dedicated to roadway and 25 percent of the space is dedicated to streetscape including medians, amenity areas, pedestrian and bicycle infrastructure. The Recommended Alternative results in approximately 42 percent of the space dedicated to the roadway, and 58 percent dedicated to streetscape features. This redistribution of space assumes both the narrowing of traffic lanes and a wider streetscape footprint than exists today.

Capital Cost and Implementation

For comparison purposes, 2017 conceptual capital cost estimates for multimodal improvements along the approximate five-mile corridor are estimated at approximately $90M. Recognizing that the full corridor improvements along East Arapahoe will most likely be completed in stages over several years, the project team will be developing a phased implementation plan that takes into consideration the different modal elements and potential funding sources.

Community Engagement

Community Working Group

The city has assembled a community working group to provide input to city staff during the planning process. The working group's feedback will help staff explore future transportation options that serve the varied needs of the community.

View the CWG's Statement of Findings, released Feb. 16, 2018.

Next Steps

Since the February public workshop, the project team has been working to more fully define the ideas proposed by workshop participants. Several transportation improvement alternatives will be refined and evaluated to test their performance and to understand the trade-offs associated with different types of transportation infrastructure.

Alternatives will include each of the following elements:

  • BRT: Alternatives will illustrate BRT running in the center lanes of East Arapahoe (center-running) or in the outside lanes (side-running) with right turning traffic. Potential BRT station locations and alternative routing to and from the Boulder Transit Center in downtown Boulder will also be shown.
  • Bicycle facilities: Alternatives will illustrate both on-street and off-street (or multi-use path) facilities for bicyclists along East Arapahoe. On-street facilities can include a buffer-protected bikeway that is separated from traffic by striping and/or a barrier-protected bikeway that is separated from traffic by a simple curb, bollards, landscaping, or any other form of physical protection.
  • Pedestrian facilities: Alternatives will illustrate multi-use paths, like the existing 12-foot path located along much of East Arapahoe today, along the extent of the corridor. Potential mid-block and/or new pedestrian crossings at BRT stations along East Arapahoe will also be shown.
  • Landscaping: Alternatives will illustrate plantings along East Arapahoe Avenue located on-street in planting strips or medians and off-street along bicycle and pedestrian paths.

The project team will conduct a preliminary evaluation of all transportation improvement alternatives and will compare each to future conditions without improvements. The evaluation will consider factors such as:

  • Percent of trips expected to be made via walking, biking, transit and auto,
  • Pedestrian and bicycle comfort and accessibility,
  • Transit and vehicle operations and travel time,
  • Safety, and
  • Ability to meet the city’s sustainability goals.

The project team will present these draft concepts and a preliminary evaluation of the concepts later this summer.

Related Projects

East Arapahoe Multi-Use Path and Transit Stops Project

As part of the East Arapahoe Transportation Plan, the City of Boulder's East Arapahoe Multi-Use Path and Transit Stops Project will fill in missing links in the multi-use path system and enhance bus stops along Arapahoe Avenue.

CO 7 Multimodal Corridor: Brighton to Boulder

A Colorado Department of Transportation (CDOT) project, the CO 7 Multimodal Corridor will improve traveler safety, personal travel efficiency and operations, and access to multimodal travel along a nearly 25 mile stretch of Colorado State Highway 7 (CO 7, or Arapahoe Avenue) between Brighton and Boulder.