code: def setEmergencyDecel(self, typeID, decel):
          
          self._connection._sendDoubleCmd(
              tc.CMD_SET_VEHICLETYPE_VARIABLE, tc.VAR_EMERGENCY_DECEL, typeID, decel)
docs: setDecel(string, double) -> None
  
          Sets the maximal physically possible deceleration in m/s^2 of vehicles of this type.