from a truck drivers point of view and that is the 52 - 55 driver
as i am limited to 55, coming up behind a driver who is doing approx 52 and then accelerates to 55 for a while then slows again is painstakingly annoying. i catch them up but when i want to pass, i cant because they then speed up to my speed. i have come across this several times over the past few weeks. the only chance i have is a downhill slope where my weight can push me over the limiter but even then, they sometimes speed up too
