Out along the west-side industrial streets, winter mornings begin with engines turning over in the dark and headlights swinging across snow nobody has touched yet. Milton Rents in Rochester works the snow side of that hour — clearing lots and drives, opening walkways, spreading salt where the melt will refreeze by dusk. A working yard needs room to move by the time the first truck arrives, so the plowing is laid out with that in mind. There is a quiet reward in a lot that looks as though the storm skipped it. Rochester, Gates, Greece and the towns around them are on the route.