>This effectively excludes every bus line, because there is no reason for bus lines to run the same route all day long. This is one of the major advantages of b

>This effectively excludes every bus line, because there is no reason for bus lines to run the same route all day long. This is one of the major advantages of buses. I can't think of a single bus line in my city that actually changes it's route throughout the day. Sure there's some that don't go as far into the suburbs after a certain time, but the part in the city would still qualify as "all day" by that definition. And as a rider, I would hate to use a bus that goes by one neighborhood in the morning and another in the afternoon. That's what different route numbers are for, there's no reason to have the confusion.