* @return the initial position of the vehicle
* @throws IOException
* @throws TraciException
*/
private float[] subscribeToVehicleValues(String id, int startTime) throws IOException, TraciException {
SubscribeVehicleValueRetrivalCommandGenerator vehicleValue = new SubscribeVehicleValueRetrivalCommandGenerator(
startTime, ModelManager.getInstance().getSimulationEndTime() * 1000, id);
Message request = new Message(vehicleValue);
request.writeToStream(this.outputStream);
Message response = Message.readFromStream(this.inputStream);
float[] position = null;