I found an “old” article on public transportation and its importance to cities:
Public Transport is Worth Way More to a City Than you Might Think, [by Eric Jaffe in http://www.citylab.com, August 14, 2013]
While much attention has been on walking and cycling, which are essential modes of transport, I believe public transport has an even much more value especially given the land use in many cities. This is particularly true in the Philippines where land use planning is basically a term since implementation is generally weak. This is very much evident in the case of residential development and the limited choices for transport. Many people, for example, reside in the periphery of Metro Manila and its surrounding areas. They often commute over long distances and incur long travel times due to congestion roads. Mass transit infrastructure could have made commutes faster, saving precious time that translates into economic value.