SumoTraciConnection conn = new SumoTraciConnection(sumo_bin, config_file);
conn.addOption("step-length", step_length+"");
conn.addOption("start", ""); //start sumo immediately
//start Traci Server
conn.runServer();
for(int i=0; i<3600; i++){
conn.do_timestep();
conn.do_job_set(Vehicle.add("v"+i, "car", "r1", 0, 0, 13.8, (byte) 1));