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D2: Dallas Central Business District (CBD) Second Light Rail Alignment

The D2 Project is the future second DART light rail alignment through downtown Dallas. The D2 Project will increase system capacity, provide operational flexibility and serve new markets. It is a critical element of sustaining the DART system into the future by adding core capacity to the network.


On September 22, 2015, the DART Board of Directors passed Resolution No. 150101 Approval of the Locally Preferred Alternative the Second CBD Light Rail Alignment (D2). The Locally Preferred Alternative (LPA) is approved as Alternative B4 Lamar-Young with a Modified Jackson Alignment, which incorporates an alignment shift east of Dallas City Hall to address potential impacts along Young Street. The resolution further states that:

  • DART will continue to examine LPA routing options and station locations as required by the federal funding process.

  • DART will continue to review feasibility for an extension of D2 (referred to as Phase 1 on the map a tunnel spur to the south), as well as other options, to provide access to the Dallas Convention Center and High Speed Rail.

  • DART staff will advance these elements into Project Development including Preliminary Engineering (PE) and Environmental Impact Statement (EIS) documentation, pending approval from the Federal Transit Administration.
DART Board of Directors D2 Locally Preferred Alternative Map DART Board of Directors D2 Locally Preferred Alternative Map


Now that an LPA has been approved, DART is getting ready to enter the Federal Transit Administration (FTA) Project Development phase. Several stakeholder meetings and opportunities for public comment will be provided. Project Development will focus on developing more detailed Preliminary Engineering (PE) to support an Environmental Impact Statement (EIS). The PE/EIS effort will refine the preferred alternative, as well as evaluate additional routing options along Young, Wood and Jackson Streets within the EIS process.

Project Development is an approximately 18-month effort and will include preparation of a Supplemental Draft EIS (SDEIS) to assess the benefits, impacts and costs of the project and of routing options in the eastern end of downtown. This SDEIS will build upon and update the 2010 DEIS and will be made available to the public for review and comment, during which time DART will hold public meetings and a formal public hearing on the project. Based on the SDEIS and public input a single project will be documented in a Final EIS. The Final EIS will outline mitigation commitments to address identified impacts; this is followed by a Record of Decision (ROD) from FTA, which closes the environmental process. A mitigation monitoring program is part of the FEIS and ROD and will be put in place as the project proceeds into Engineering and Construction.

As of October 15, 2015, DART is awaiting authorization from FTA to enter Project Development. The FTA process is shown below:
FTA process chart


Visit and join the conversation! Updates will be provided once DART is authorized into Project Development.


D2 is being implemented as part of a Program of Interrelated Projects. The Program of Interrelated Projects is being advanced under the Federal Transit Administration (FTA) Capital Investment Grant program and consists of these three elements:
  • D2 Dallas CBD Second Light Rail Alignment Project
  • Red and Blue Line Platform Extensions - modifications at 28 stations on the Red and Blue Lines to accommodate longer trains
  • Central Dallas Streetcar Link to connect the Union Station to Oak Cliff Dallas Streetcar to the McKinney Avenue Trolley
The first two projects listed above are being submitted to FTA as Core Capacity projects, and a 50% federal funding share is being requested. As of October 2015, DART has been authorized into Project Development for the Platform Extensions Project. Authorization for the D2 Project is pending and anticipated in Fall 2015. Advancement of the streetcar project is subject to additional coordination with the City of Dallas and selection of a LPA for that project.

Project History and Background

DART launched the D2 Study in 2007 to identify and evaluate a range of transit improvements in the Central Business District (CBD). The D2 Study focused on identifying the second phase of major transit improvements in Downtown Dallas. The improvements will ensure high quality transit service as the DART system expands to meet growing needs. In addition, it is about improving mobility and circulation to, through and within the CBD, serving local and regional mobility needs, and enhancing the ability for the DART system to grow and thrive.

The D2 Study was done in two phases. Key information from each phase is provided below:


Phase One of the study concluded with the Alternatives Analysis/Draft Environmental Impact Statement (AA/DEIS) in May 2010. The AA/DEIS include the evaluation of the B4 Lamar-Young Alternative, which will be the starting point for the SDEIS effort.


Phase Two of the study concluded in September 2015 and built on the original effort in response to comments on the AA/DEIS and because of changed conditions in downtown. These changed conditions included the new Dallas Streetcar (Oak Cliff line) and planned extensions, the Downtown Dallas 360 Plan, and proposed High Speed Rail (HSR) from Houston to downtown Dallas. These comments and issues led to new D2 Alternatives as well as refinements to those considered in the AA/DEIS.

In February 2013, DART held public meetings to present the alternatives and refinements.

In June 2015 DART held public meetings to present the preliminary evaluation results which supported the selection of a preferred alternative.

The range of alternatives considered during the Alternatives Analysis phase of the project is shown below:
D2 Alternatives Map
View a PDF version of this map

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