• Length: 18.5 miles, 13 miles under construction
  • Vehicle Type: Electric commuter rail
  • Stations: 8 total, 6 under construction (Union Station not included)
  • Parking: 3,850 total spaces, 2,593 under construction
  • Frequency of Service: 20 min (peak) / 30 min (off-peak)

At a Glance

  • The N Line is part of RTD’s 2004 voter-approved FasTracks plan to expand transit across the Denver metro region.
  • The 18.5-mile electric commuter rail line will connect Union Station with Commerce City, Northglenn, Thornton, and North Adams County.
  • When completed, the line will feature eight stations: National Western Stock Show, 72nd, 88th, 104th, 112th, 124th • Eastlake, 144th, and 162nd • State Hwy 7.
  • Design and construction of the corridor from Union Station to 124th Avenue is underway; the remainder will be built as funds become available.

Project Overview

  • 2001: RTD completed an investment study to evaluate north I-25 transit from Denver to Brighton.
  • 2005: RTD conducted a scoping study to build on previous analyses of the corridor.
  • 2006: RTD began an Environmental Impact Statement (EIS) process to analyze transit options for the corridor. The EIS built on previous transit alternative studies, possible adverse implementation impacts and subsequent mitigation.
  • 2009: RTD purchased most of the N Line right-of-way from Union Pacific Railroad for $119 million.
  • 2011: RTD issued a final EIS, identifying community benefits and possible impacts of a new transit service in the area; the team received a Federal Transit Administration Record of Decision.
  • 2012: RTD committed funding to build the project’s first phase from Union Station to the National Western Stock Show Station.
  • 2013: RTD received an unsolicited proposal to build the line, opened a competitive bidding process, and later awarded a design-build contract to Regional Rail Partners (RRP) to complete the line to 124th•Eastlake, with options to extend it as funds become available.
  • 2014: The N Line broke ground in March; design of the project reached 60 percent completion in September; and North Metro received rail delivery and completed tie-in work at Union Station in November.
  • 2015: Utility relocation and right-of-way acquisition underway; 90 percent design completion; construction began in summer 2015.
  • 2016: Construction was underway throughout every segment of the project.
  • 2018: The project team began construction on the Thornton Crossroads 104th Station parking garage. All rail track is in place from Union Station to the Eastlake 124th Station and tie-in work to Union Station is complete. All bridges and retaining walls have been completed.
  • 2019: Wires on the North Metro Line went live in March and trains began testing on the corridor in April. Safety outreach to the schools and communities is ongoing.


Updated August 2019