traciOutputStream.writeTraciObject(TraciConstants.DATATYPE_STRING, "".getBytes());
traciOutputStream.writeByte(7); // count of following variables
traciOutputStream.writeByte(CURRENT_SIMULATION_TIME);
traciOutputStream.writeByte(NUMBER_LOADED_VEHICLES);
traciOutputStream.writeByte(IDS_LOADED_VEHICLES);
traciOutputStream.writeByte(NUMBER_DEPARTED_VEHICLES);
traciOutputStream.writeByte(IDS_DEPARTED_VEHICLES);
traciOutputStream.writeByte(NUMBER_ARRIVED_VEHICLES);
traciOutputStream.writeByte(IDS_ARRIVED_VEHICLES);
traciOutputStream.close();
return new Command(ID, outputStream.toByteArray());