[btrettel]

As a daily transportation cyclist, I doubt I add any measurable amount of time to the commutes of drivers I encounter on the road. In fact, it's not uncommon to see the same drivers at multiple stoplights because the effective speed (due to the stoplights) is sometimes a bit slower than I ride.

That of course leads to another problem: Impatient drivers giving me close "punishment passes" only to wait at the stoplight. This is a common experience for cyclists.

Add on top of this the fact that most cyclists usually take different routes than drivers would from point A to point B. (Routes with less cars.)