The D2 Subway: Your Official Guide to North Texas’ Newest Subway


As summer winds down, DART’s winding up, especially when it comes to moving forward on projects like the D2 Subway. We know that it’s been awhile since we dug in (pun intended) to the details of the D2 Subway.  That’s why we’re giving you a refresh on the ins and outs of how DART plans to break ground on North Texas’ newest subway. Check out the info below to learn all you need to on portals, tunnel boring machines, stations, and more.

Anatomy of a Subway

Although a subway station may not look like much from the outside, once you move underground, there is an open subterranean level that can accommodate many people as they move to and from the subway.

Some folks might think a portal means a station, but not so when it comes to subway construction. Unlike fully developed subterranean stations, portals simply refer to the entrance and exit from below ground to above-ground. Learn more about the proposed portal locations for the D2 Subway.

Digging underground is a lot more difficult than it may first appear. Different structures underground including the foundations of buildings, utility wires, and a system of pipes can present challenges when building a new underground mode of transit. Learn more about a Tunnel Boring Machine (TBM) that assists in creating a safe tunnel for the D2 Subway.

As an alternative to the tunnel boring machine, the Sequential Evacuation Method (SEM) may be employed.  Additionally the Cut and Cover method may be used in transition areas from a portal to the actual tunnel until it reaches significant depth.

Breaking down the D2 Subway

Just like the anatomy of the human body looks at all of the complex bones, ligaments, and muscles that make a body function; the anatomy of a subway takes a look at all of the intricate engineering pieces that go into making an underground train function safely, and efficiently. We know that large-scale transit projects like the D2 Subway can be confusing, so that’s why we’ve broken it down into smaller sections, so take a look at these “anatomic” parts, and sign up for updates so you can get the latest on the D2 Subway.

About DART Daily

Dallas Area Rapid Transit (DART) gets you around 13 cities with rail, bus, paratransit, and rideshare services. We serve DFW International Airport and Fort Worth via the Trinity Railway Express (TRE). The service area consists of 13 cities: Addison, Carrollton, Cockrell Hill, Dallas, Farmers Branch, Garland, Glenn Heights, Highland Park, Irving, Plano, Richardson, Rowlett and University Park.
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9 Responses to The D2 Subway: Your Official Guide to North Texas’ Newest Subway

  1. Dan says:

    Why didn’t DART consider an uptown subway loop? I would have accomplished the same goal – relieving congestion on the “transit mall” while costing a little less than the downtown subway, while increasing ridership by bringing DART rail to a new corridor?

    • DART Daily says:

      Incorporating an Uptown element was considered, but never enjoyed broad stakeholder support. DART Rail is connected to the east end of Uptown at Cityplace/Uptown Station. The McKinney Ave. Streetcar travels the length of Uptown. DART Rail connects to it at Cityplace/Uptown and at St. Paul Station at the western end of the streetcar line. There is ongoing discussion about an expanded modern streetcar through downtown Dallas which would also connect to the D2 Subway.

  2. Beth says:

    Why does DART continually avoid any decent transit in the Farmers Market area?

  3. Richard says:

    If all goes according to plan, when does DART expect to break ground and begin construction?

    • DART Daily says:

      D2 Subway Project Development efforts will take approximately 18-months through early 2020. Following that phase, construction is currently slated to begin later that year or in early 2021.

  4. H Glenn Knight says:

    I like keeping up with new transportation in the D/FW area.

  5. Sheryl Hardin says:

    When will suburban expansion be considered? A subway route would be the perfect answer to relieving toll road congestion up COIT or Preston where above ground costs would appear to be too high. A route by UTD would certainly be beneficial to area businesses.

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