South Broadway & I-25 Improvement Projects

Project Background

The City and County of Denver's is redesigning the interchange of I-25 and Broadway. The improvements aim to create a safe and efficient area for all transportation modes ̶ pedestrian, bicycle, transit, and automobile.

The redesign of the ramps to I-25 is intended to help ease congestion on Broadway and Lincoln, reduce the potential for crashes, enhance bicycle and pedestrian connectivity in the area, and improve access to and from RTD’s Broadway Station.

The improvements will also help accommodate economic development of the Gates District and Broadway Park redevelopment. This project will expand on previous improvements that have been implemented by Denver and CDOT. 

Project Features

  • Improves access to RTD’s Broadway Station by constructing a new north entrance through Exposition, allowing riders and transit buses to bypass the interchange area.
  • Increases the pedestrian and bicycle access to transit station by building new shared-use paths and rebuilding existing sidewalks.
  • Improves pedestrian and bicycle safety by building new, well-lit facilities with adequate protected space along and across Broadway and Exposition
  • Moves vehicles more efficiently with coordinated traffic signals and new lane configurations on Broadway, Ohio, and Lincoln.
  • New configuration of the southbound I-25 on-ramp minimizes backups on Broadway between Exposition Avenue and Kentucky Avenue

DOTI is committed to keeping people moving during construction. Crews will do as much work as possible to minimize effects. At the same time, there will be traffic shifts, lane reductions and detours during construction. DOTI will announce these changes as they are scheduled.

South Broadway and I-25 Improvement project map

Construction Update - week of May 3, 2021:

During the week of April 25 to May 1, crews continued concrete and asphalt pours from Broadway to Bannock and completed the last three inlets. Other work included asphalt ditch paving, sidewalk pours, flatwork, planter irrigation, electrical pull box installation, and curb and gutter finishing work.

This week, crews will ramp up final formwork and concrete paving behind Quest Diagnostics from Broadway to Bannock, including the Bannock tie in. Other work includes flatwork for asphalt paving, installation of Agri Drain water quality structures at the West Exposition planters, adding bioretention topsoil to planters and landscaping areas, and starting plantings at East Exposition and South Broadway.

Traffic and Pedestrian Advisory 

The temporary barrier on the west side of South Broadway from Galleria of Stone to Ohio has been removed. The right two lanes remain closed with construction barrels, cones and signs in place to alert traffic. While the sidewalk is open, caution is advised as only protective fencing separates pedestrians from live construction areas. 

The direct entryway to the south loading dock at Quest Diagnostics is closed during this phase of construction. Vehicles will be detoured to the second entryway by Galleria of Stone and Kitchens on Broadway where a temporary route is in place for loading dock deliveries.  The sidewalk at this location is also closed.

The east sidewalk on South Broadway from ToyExus to Roth Living is open but narrowed and separated from live construction by protective fencing. This is to protect pedestrians while crews perform planter and irrigation work, make curb ramp and gutter upgrades, and for access to traffic lights and electrical cabinets.

Finished concrete paving on west side of Broadway

Finished concrete paving on the west side of South Broadway behind Quest Diagnostics

Crews performing curb and gutter work

Crews performing curb and gutter work in front of Roth Living.

North view of concrete pour on S Broadway at Quest

North view of concrete pour on South Broadway at Quest Diagnostics

Curb ready for finishing work and landscaping

Curb at Roth Living ready for finishing work and landscaping.

Crews installing formwork on top of sub grade

Crews installing formwork on top of sub grade on the east side of South Broadway.

Views of new striping, lane markings and signals

West and east views of new striping, lane markings and traffic signals on Exposition

Current Phases

CONSTRUCTION - Phase I: Exposition Ave & Broadway

Phase I:

Phase I reconstructs Exposition Avenue from Lincoln to Bannock Street. This construction phase expands Exposition west of Broadway to future align with the Bannock Street extension and installs new traffic signals on Exposition at Broadway and Lincoln.

This phase also minimally widens and reconstructs Broadway for half a block south of Exposition to provide wider sidewalks and streetscape.

Meetings and Public Outreach Materials:

Project Updates and Schedule:

The construction of Phase I will begin in August 2020.  The duration of this phase is appx. one year.

DESIGN - Phase II: Broadway & I-25 Interchange

Phase II:

Phase II replaces the southbound on-ramp to I-25 from Broadway and finalizes the extension of Bannock Street. This phase focuses on the multimodal connection improvements on Broadway, Lincoln, Ohio, and Kentucky. This phase also includes the reconstruction and installation of new traffic signals on Ohio Avenue between Lincoln and Broadway into RTD’s Broadway Station.

Project Updates and Schedule:

The design of Phase 2 is underway, and will take about a year to complete.  Construction likely won’t begin until Q1 2022.

Schedule, maps, updates »

Prior Efforts

CONSTRUCTION COMPLETED - South Broadway & Mississippi Avenue

South Broadway Reconstruction Project Wraps Up

Denver's Department of Transportation and Infrastructure has reconstructed a stretch of South Broadway from Kentucky to Arizona and a section of Mississippi Avenue between the Consolidated Main Line (CML) Railway and Sherman Street. The project began in March 2016 with the goal of improving overall mobility for people on bikes, on foot and in vehicles. 

Schedule, maps, updates »

Engineering Design

Right of Way:

The City and County of Denver's Broadway Arizona to Exposition Project will be constructed in three to four phases. As each phase is funded for construction, the City and County of Denver (City) will follow the Federal Highway Administration (FHWA) guidelines for acquisition of required properties within the project corridor. This guidance provides the City will follow their standard process of completing Right-of-Way plans, then City Council passing an ordinance authorizing property negotiations and acquisitions. Upon ordinance passage the City will contact affected property owners and begin the negotiation discussions, offers will be made after appraisals or value finds are completed. The City reserves the right to utilize imminent domain but will continue to negotiate to meet fair value agreements through the acquisition process.

Impacts determined during the Environmental Assessment can be found on page 3-20 and 3-21 of this document:

South Broadway Environmental Assessment and Section 4(f) Evaluation(PDF, 7MB)

Final Design Project Scope:

The overall project scope for these two projects will reconstruct South Broadway from Kentucky Avenue to Arizona Avenue and Mississippi Avenue between the Consolidated Main Line Railway (CML) and Lincoln Street. Improvements will include roadway widening; multi-use paths from Arizona to Kentucky along Broadway and from the CML to Sherman along Mississippi; pedestrian and street lighting; landscape and streetscape; and upgraded signalized intersections at Broadway/Tennessee and Broadway/Mississippi.

Meetings and Public Outreach Materials:

2010–2012 public outreach materials

Planning Efforts

Adopted in April 2016, the I-25 and Broadway Station Area Plan guides the future growth around the station and surrounding neighborhoods. The Plan identified the I-25 Interchange and Broadway Reconstruction as a project that will enhance the multi-modal environment within the S. Broadway corridor.

I-25 and Broadway Station Area Plan(PDF, 13MB)