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
Depending upon which Bay Area newspaper you read, the new 3.2-mile Oakland Airport connector, an elevated, driverless tram that takes eight minutes and costs $6, is either a huge success or a $484 million boondoggle. It began service on November 22.
Dec 1, 2014 San Francisco Examiner
Stephen Smith questions the reasoning behind this increasingly popular breed of capital project, arguing the real benefits of connectors rarely justify their hefty price tags.
Oct 18, 2010 Market Urbanism