RTD Will Open New Bus-Only Lanes on East Colfax

Transit access shifts for Denver businesses as Routes 15 and 15L move to center lanes on September 27.

Updated on Sept. 24, 2026 in Openings & Closings

Isometric editorial illustration of a city bus traveling within a dedicated center transit lane on an urban avenue. — The Regional Transportation District will move bus routes 15 and 15L to dedicated center lanes on East Colfax Avenue starting September 27. AI Illustration. Upload story photo >

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Do you support the expansion of dedicated bus lanes in your area despite construction impacts?

The Regional Transportation District will launch dedicated bus-only lanes on East Colfax between Broadway and Colorado Boulevard on September 27, 2026. This infrastructure adjustment moves transit operations into center lanes to support faster passenger movement.

Why it matters

The shift in transit lanes impacts traffic flow, delivery logistics, and foot traffic patterns for storefronts along the East Colfax corridor. Business owners should prepare for the operational changes as the project moves toward full BRT service by 2027.

The transit project carries an estimated total budget of $280 million. Construction on the segment began in 2024, with full BRT service expected by the end of 2027.

The players

Regional Transportation District

The public transit agency providing bus and rail service across the Denver metropolitan area.

The details

Buses will now operate exclusively in the two center lanes of East Colfax Avenue, requiring drivers and businesses to adjust to new lane configurations. The new center station platforms are equipped with security cameras, lighting, PA systems, and emergency phones. Near-level boarding ramps have been implemented to facilitate accessibility for passengers across the corridor.

Construction on the project began in 2024.
Bus-only lanes open for passenger service on September 27, 2026.
A project milestone celebration and small business hop will occur on September 28, 2026.
Full BRT project completion is expected by the end of 2027.

Market Landscape

This development follows the multi-year planning phase of the East Colfax Bus Rapid Transit (BRT) project. It marks a significant transition toward full transit integration along one of Denver's most active commercial corridors.

Business owners should review how the center-lane transition impacts customer access and delivery drop-off zones along the Broadway to Colorado Boulevard segment. Evaluate staffing and inventory levels for the small business hop event scheduled for September 28 to capitalize on potential increased foot traffic.

The takeaway

The opening of center-lane bus access signals a long-term shift in the street's logistical operations. Monitor the rollout of the small business hop event to identify new opportunities for customer engagement.