Michael O'Hare (Berkeley Prof) has an article about why public transit really wants to be subsidized: http://www.samefacts.com/2007/05/energy-and-environment/m

Michael O'Hare (Berkeley Prof) has an article about why public transit really wants to be subsidized: http://www.samefacts.com/2007/05/energy-and-environment/more-on-transit-and-urban-planning/ http://www.samefacts.com/2007/05/energy-and-environment/more... The short version is that the marginal cost for an additional rider is basically zero.