Northwest Area Mobility Study

The Northwest Area Mobility Study (NAMS) is a collaborative effort that addressed significant cost increases and delays associated with building and operating the 41-mile Northwest Rail commuter rail line from Longmont to Denver. The study concluded with elected officials, the Regional Transportation District (RTD), Colorado Department of Transportation (CDOT) and 13 area jurisdictions and agencies reaching consensus on transit priorities in the region.

NAMS priorities include:

  • US 36 Bus Rapid Transit (BRT): Determine the remaining FasTracks BRT funding/scope for the US 36 corridor and complete corresponding commitments.
  • Priority Arterial BRT Corridors: Conduct advanced planning and design of arterial BRT on CO 119CO 7 and US 287. New funding must be identified for these and other arterial BRT corridors.
  • US 36 to Denver Reverse Commute: Work with CDOT to evaluate the reverse commute traffic between Denver Union Station and US 36 (e.g. Boulder-bound a.m. travel and Denver-bound p.m. travel). For the I-25 downtown Express Lane, evaluate alternatives to ease reverse commute traffic.
  • B Line (formerly known as Northwest Rail): Annually evaluate strategies to accelerate implementation of the B Line while recognizing it is a long-term project. Evaluate the feasibility and cost of constructing the line in segments.
  • Additional Arterial BRT: Consider implementing additional arterial BRT/enhanced bus corridors (South Boulder Road, 120th Avenue and Colorado 42/95th Street)
Adjacent Mobility Projects Map. Future connection with Colorado's Front Range Passenger Rail service and BRT services to the north. Map displays with Longmont at the north ending at Highway 66 and Denver to the south ending at Union Station. Map shows potential BRT corridors along CO119, US287, 120th Avenue, South Boulder Road, Arapahoe/SH7, CO42, North I-25 Bi-directional lanes; Fastracks Corridors inlcuding Northwest Rail (future construction), B Line Commuter Rail (built), Flatiron Flyer.
Northwest Area Mobility Study Map (click to view larger)
Graphic representing BRT Elements. Final BRT elements and design will be different than dispayed. Elements include digital sign show when the BRT will be arriving with frequent on-time service; a kiosk for enhanced fare collection; enhanced stations with seating and shelter; comfortable vehicles with BRT branding; transit signal priority; and dedicated lanes where possible.

BRT-Related Projects

RTD is currently working on a number of BRT-related projects, including:

  • Proceeding with planning efforts on Colorado State Highway 7.
  • Proceeding with planning efforts for CO 119 (the highest prioritized BRT corridor).
  • Beginning a BRT Feasibility Study for US 287 between Longmont and US 36.

Commuting Solutions is working with local and regional partners to identify funding for these and other arterial BRT corridors. CO 119 and Highway 7 received TIP funding from DRCOG to proceed with the next level of environmental planning.

Northwest Mobility Study Areas

Conceptual View of the SH 119 Bikeway

CO Highway 119

CO Highway 119, locally known as the Diagonal, connects Boulder to Longmont and travels through Gunbarrel and Niwot. Currently there are 45,000 vehicles a day that travel along the corridor.

Woman smiles as she exits RTD Flatiron Flyer bus

CO Highway 42

The Cities of Lafayette and Louisville are working together to envision the future of State Highway 42 (also known as 95th Street, CO 42 or Courtesy Road) for people to walk, bike, ride transit or drive.

Flatiron Flyer bus outside RTD station

CO Highway 7

The Colorado State Highway 7 (CO 7) corridor between Brighton and Boulder is well positioned to develop as a corridor of local livability and multimodal regional access.

RTD train rides down track

RTD FasTracks

In March 2019, the Northwest Mayors & Commissioners Coalition released a letter reconfirming their commitment to Northwest Rail and Peak Service exploration.

Group waits in line to board RTD Flatiron Flyer image

US 287

Boulder County, in coordination with stakeholders, regional partners and members of the public, is starting a multi-phased re-envisioning process of US 287.

Commuting Solutions
CO 119 Membership Meeting

April 24, 2024  | 8:00 – 9:30 a.m.
At Hampton Inn & Suites, Boulder North