Dallas' D2 subway reaches preliminary design milestone

Dallas Area Rapid Transit (DART) reached an important 20% completion of the preliminary design for the D2 Subway through Downtown Dallas.

The next phase is preparing a supplemental draft environment impact statement (EIS) to access potential impacts and benefits of the project.

The supplemental draft EIS and a preliminary design will be published later this spring for a 45-day public review period.

To advance the project through the Capital Investment Grant program of the Federal Transit Administration (FTA), DART must request entry into the program’s engineering phases and complete 30% of design and the final EIS.

Once D2 is approved by the FTA into the engineering phase, DART will advance the project through design and construction with a projected revenue start date of 2025.