If you drive the 55mph speed limit on "the bypass" in pretty much any metro area in the united states, you are risking your own life to be going so slow relative to traffic.
I'm generally the slowest driver on my commute, judging from the fact that I rarely pass anyone; however, I go faster than the speed limit, at some point during the trip, nearly every time I get in the car.
I do not endanger those around me, in my opinion.