If 2 drivers travel a 100km road non-stop; no police barriers, no speed bumps, no potholes.
Driver 1 floors his gas pedal and does 160 Km/hr
Driver 2 takes it easy and goes a little over the speed limit - 90Km/hr
Would you believe Driver 2 will only get there roughly 35 minutes later?
Those 35 minutes reduce when you start introducing real life factors like curves in the road, potholes, multiple stops.
Tell a commercial driver you know, to ease up on the gas pedal. The lives onboard are more valuable than the few minutes gained.
[Isn't it soooo annoying when you speed up and pass someone on the road then you get caught in traffic and the person not only catches up but also eases riiiiight past you?]