Josh Barro provide examples galore of why the answer to that question isn't always yes—where costly rail investment has been to the detriment of existing transit. His column targets proposed projects, such as New York's LaGuardia Airport AirTrain.
Feb 11, 2015 New York Times - The Upshot
LaGuardia lacks an AirTrain, unlike the two other airports that serve the New York City area, so public transit access is available via Queens and Manhattan buses. But would a $450 million proposal by New York Gov. Andrew Cuomo remedy the problem?
Jan 22, 2015 the transport politic
A proposal by Governor Andrew M. Cuomo would add an AirTrain-like connection from Queens to the beleaguered airport.
Jan 20, 2015 New York Times
Called the "biggest accomplishment" in DART's 31-year history, city leaders are hoping the new airport connection brings more international cachet along with tourists, conventions, and investments in downtown.
Aug 18, 2014 The Dallas Morning News
BART's people-mover connection to the Oakland Airport is jeopardized by an FTA ruling that the agency failed to reach out to minorities, potentially denying the agency of $70 million in stimulus funds. Might the funds go to other transit needs?
Jan 26, 2010 SF Gate - Oakland Blog