v = GetVehicle(p1);

	if (v->type != VEH_ROAD || !CheckOwnership(v->owner)) return CMD_ERROR;

	if (v->vehstatus & VS_STOPPED ||

			v->u.road.crashed_ctr != 0 ||

			v->breakdown_ctr != 0 ||

			v->u.road.overtaking != 0 ||

			v->u.road.state == RVSB_WORMHOLE ||

			IsRoadVehInDepot(v) ||

			v->cur_speed < 5) {