I'd guess some people want to keep a bit of the momentum going for fuel efficiency? Going from standstill to moving, with a big heavy metal box, requires more e

I'd guess some people want to keep a bit of the momentum going for fuel efficiency? Going from standstill to moving, with a big heavy metal box, requires more energy than simply accelerating an already existing momentum, even if it's just a small momentum. But I'm with you: Stop means stop