each TriMet bus chews up the roads equal to 22,000 cars (information directly from Sam’s office).

I'd love to see the full communication behind that statistic ... but taking your numbers at face value, they are in the ballpark of automobiles. TriMet reports an average number of 32 bus boarding rides per vehicle hour (142 for rail). Assuming a bus operates at least 12 hours per day on average, that's 140,000 boardings per year. (That's an assumption -- if anyone knows the average number of vehicle hours per bus, please let us know.) How many automobiles serve 140,000 boardings per year, or anywhere near that ballpark?