Comment by tristanj

The reason there's not more public transit is because the economics are terrible. Looking at the financials:

  Cost per passenger trip:
    BART: $1.07B operating expenses / 59.5M trips = $16.92
    SF Muni: $1.13B / 160M trips = $7.06
    Caltrain: $225M / 9.1M trips = $24.73

  Passenger Fare collected per trip:
    BART: $259M / 59.5M trips = $4.35
    SF Muni: $111M / 160M trips = $0.69
    Caltrain: $58.7M / 9.1M trips = $6.45

  Subsidy per trip:
    BART: $12.57
    SF Muni: $6.37
    Caltrain: $18.27

  Cost per passenger mile:
    BART: $1.07B / 892.5M passenger miles = $1.20/mile
    SF Muni: $1.13B / 312M = $3.62/mile
    Caltrain: $225M / 177.5M = $1.27/mile

  Subsidy per passenger mile:
    BART: $1.07B / 892.5M passenger miles = $0.84/mile
    SF Muni: $1.13B / 312M = $3.26/mile
    Caltrain: $225M / 177.5M = $0.94/mile

Every single ride requires a $6 to $18 subsidy, paid for by tax dollars.

For comparison, federal spending for the interstate highway system is about 2-3 cents per passenger mile.