Other cities across the country are taking bold steps toward expanding their transit systems. Here is a summary of rapid transit expansion currently under construction in the United States:

Los Angeles

Los Angeles recently embarked on an ambitious plan to build thirty years of transit expansion in the span of a decade. The 30/10 Plan will result in the construction of eleven new lines and rapid transit extensions within a dramatically shortened timeframe. With its completion, Los Angeles will have the second-most extensive rapid transit system in the United States, surpassed only by New York. Two lines are already under construction.

Courtesy of The Transport Politic

Metro Projects

The Transport Politic: Realizing the Impossible: Los Angeles’ Subway Extension

The Transport Politic: LA’s 30/10 Plan Advances Suddenly

The Transport Politic: Los Angeles’ Gold Line Foothill Extension Approved for Funding

New York

New York City recently began construction on the much-needed Second Avenue Subway, which will provide rapid transit service to the East Side of Manhattan and add more flexibility to the subway system. An expansion of the #7 subway line to serve the new Hudson Yards development is also under construction.

New York City MTA: Second Avenue Subway

New York City MTA: #7 Subway Extension

Washington, DC

Our nation’s capital continues to expand its already extensive┬árapid transit system. The newest line under construction, the Silver Line, will finally connect Dulles Airport into the system. In addition, Washington has an innovative streetcar system under construction, as well as a light rail plan in the works.

Transport Politic: Stretching the Limits of Washington’s Dense Core

Transport Politic: Washington Promotes Massive New Streetcar Project

Transport Politic: Maryland Governor Supports Light Rail for Red and Purple Lines

Dulles Corridor Metrorail Project

Portland, Oregon

Portland has greatly expanded its light rail system since it was initially constructed in the 1980s. The Portland-Milwaukie Line is expected to begin construction shortly, and other lines are in the planning stages, including an ambitious plan to expand Portland’s streetcar system throughout the city (an extension is already under construction).

Portland Eastside Streetcar Loop

Portland-Milwaukie Light Rail Project

The Transport Politic: Portland’s Seemingly Never-Ending Light Rail Program Keeps Growing

The Transport Politic: Portland Studies Streetcar Expansion Citywide


Dallas recently embarked on a large expansion plan for its light rail system, the 2030 Transit System Plan. One new line recently opened, and two new lines are under construction, totaling almost fifty miles of new light rail for the city.

DART Rail Expansion Maps

DART 2030 Transit System Plan

Other Cities With Rapid Transit or Light Rail Lines/Extensions Under Construction

Bayonne, NJ
Salt Lake City
San Francisco