|Transport mode||Average passengers|
|Vanpool||6.1||1,322 BTU/mi||87 MPG|
|Motorcycles||1.2||1,855 BTU/mi||62 MPG|
|Rail (Commuter)||31.3||2,996 BTU/mi||38 MPG|
|Rail (Transit Light & Heavy)||22.5||2,784 BTU/mi||41 MPG|
|Rail (Intercity Amtrak)||20.5||2,650 BTU/mi||43 MPG|
|Cars||1.57||3,512 BTU/mi||33 MPG|
|Air||96.2||3,261 BTU/mi||35 MPG|
|Buses (Transit)||8.8||4,235 BTU/mi||27 MPG|
|Personal Trucks||1.72||3,944 BTU/mi||29 MPG|
|Toyota Prius||1.57||1,659 BTU/mi|| 69 MPG|
So, are you better off driving a Prius to work than taking a bus? No. This data is determined by average ridership, switching to a bus would increase the average. And an average bus during rush hour has a lot more than 8.8 people on it. It looks like they assume average fuel efficiency for a city bus is about 3MPG, so, a bus with 23 people or more would beat the average Prius and even fewer if you are driving alone.
And what is with light rail averaging only 22.5 people? I think the main reason for these transit numbers is off hour service. Anyway, not really going anywhere with this post except that I was curious and thought the data were interesting.