BandA wrote:How much is the subsidy to roads? Lets say 5 to 10 cents per passenger mile. The subsidy on the MBTA is higher. As for the local roads, you have to take them to get to the train station, so subsidy is required in both cases. And local roads only get repaved every 30-40 years these days...
Fares for roads run less than 2 cents per passenger-mile (roughly 50 cents/gallon in taxes at the national average, 20 mpg, and roughly 1.5 passengers in the average vehicle-mile gives 1.7 cents/passenger-mile). Tolls add a negligible amount to that (so few passenger-miles are tolled), but even with 2 cents/passenger-mile that's a farebox recovery of less than 30%.
To bring that farebox recovery in line with the commuter rail (which is near-as-dammit 50%), you're looking at something on a continuum between:
* increase gas taxes and tolls by 60-70%
* going to repavings every 50-70 years (in which case, part of the fare for using the roads is needing a new suspension a lot more often)
(I suppose there could be heretofore undiscovered efficiency improvements in the way that roads are maintained, but since both are essentially dependent on government for the funds needed to operate, no one really looks for those efficiencies)
In that scenario, it's fair to assume that you'd see some mode-shift to transit from driving. Since transit is especially notable for its high fixed costs relative to its marginal costs the extra passenger-miles have a lower per-passenger-mile subsidy than the current transit subsidy, reducing the per-passenger-mile subsidy of transit. Taking it further, it's quite likely that the marginal transit passenger-mile adds more in fares than it adds in expenses (e.g. for commuter rail, an extra passenger-mile on a train costs a fraction of a penny directly (plus somewhere between a nickel (someone with a cash-paid monthly pass) and a dollar (roughly someone who pays for a one-way trip with cash on board) per trip for fare collection and enforcement)).
Roughly between 75 and 125 years ago, the intellectual predecessors of today's progressive movement decided that they didn't want a free-ish market in transportation (the market for transportation then can't fully be called a free market, but it was a far freer market with, most importantly, a more functional price system than we have today) and proceeded to massively subsidize roads relative to the railroads and "traction interests": FDR did more to destroy public transit in the US than anyone else. There aren't many clearer examples out there of how intervention in the market (regulating rail and transit to within an inch or less of its life while subsidizing roads) begets intervention in the market (subsidizing rail and transit).