setDecel(string, double) -> None

        Sets the maximal physically possible deceleration in m/s^2 of vehicles of this type.

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

        Sets the maximal physically possible deceleration in m/s^2 of vehicles of this type.
        """
        self._connection._sendDoubleCmd(
            tc.CMD_SET_VEHICLETYPE_VARIABLE, tc.VAR_EMERGENCY_DECEL, typeID, decel)