def setDecel(self, vehID, decel):
        """setDecel(string, double) -> None

        Sets the preferred maximal deceleration in m/s^2 for this vehicle.
        """
        self._connection._sendDoubleCmd(
            tc.CMD_SET_VEHICLE_VARIABLE, tc.VAR_DECEL, vehID, decel)
setDecel(string, double) -> None

        Sets the preferred maximal deceleration in m/s^2 for this vehicle.