Another thing I have noticed living in the Northeast is a change of corporate locations. Back in '60s. '70s and '80s corporate office location meant downtown location. Shuttle service does work competitively well if a majority of business day trips were between Manhattan in New York City to downtown Boston or D.C. But slowly corporate moved its office location to a suburb outside of the city. The company I currently work for in Boston originally started in Cambridge, MA location very close to downtown Boston but currently at Waltham (outskirt of Boston) in a very nice building. When I worked in New York City area the company location was in Westchester county and when coworkers had business trips to the Boston area the destination was usually a suburb of Boston, not a downtown location. It was often more convenient and efficient to drive to Boston than consider Shuttle service. I think suburb to suburb trips became more common for DC/NYC/Boston business trips and the Shuttle service became less convenient.