Bestow Motion

You cause a vehicle (such as a wagon or ship) or an object that is designed to move in some way (such as a windmill, water wheel, or door) to move by itself, without the need to be pulled by animals, blown by wind, or moved by currents.

It will move at its most typical speed; you can't make an object powered by this spell move especially fast, although you can make it move slower. Objects that aren't designed to move are unaffected by this spell.