That does change the math, but again, the buses aren't usually going that fast (I'm sure their average speed is far closer to zero than to 60), and like I said,

That does change the math, but again, the buses aren't usually going that fast (I'm sure their average speed is far closer to zero than to 60), and like I said, they are much more engaged, constantly stopping or changing lanes. There's much less chance of the bus driver nodding off on a quiet stretch of highway.