Number of vehicles each T seconds

Question

I wrote the script below with python and i implemented it on sumo,in order to obtain the number of vehicles between two inductionLoop,every 60 seconds,in a lane. But this one gives each second .

   #!/usr/bin/env python
   # -*-coding:Latin-1 -*
   import os, sys
   import optparse
   import subprocess
   import random
   import threading
   import time

   SUMO_HOME = "/home/khadija/Téléchargements/sumo-0.25.0"

   try:
      sys.path.append(os.path.join(SUMO_HOME, "tools"))
      from sumolib import checkBinary
   except ImportError:
       sys.exit("please declare environment variable 'SUMO_HOME' as the root directory of your sumo installation (it should contain folders 'bin', 'tools' and 'docs')")

   import traci
   routeFile="data2/cross.rou.xml"
   PORT = 8873

   #SIGN CONFIGURATIONS : NESW
   NSgreen = "GrGr"
   EWgreen = "rGrG"
   PROGRAM = (NSgreen,EWgreen)


   def nbr_veh_entr_indloop(i,o):
  # i et j se sont les inductions loop input et output
       threading.Timer(60.0, nbr_veh_entr_indloop).start()
       x = traci.inductionloop.getLastStepMeanLength(i) -  traci.inductionloop.getLastStepMeanLength(o)
       return x 
   def run():
       steps = open("data2/step.txt","w")
       traci.init(int(PORT))
       step = 0
       while step < 7200 :
             a = nbr_veh_entr_indloop("4i","40")
             k=str(a)
             print >> steps , "nombre des veh : " + k  #concaténation 
             traci.simulationStep() 
             step +=1



       steps.close()
       traci.close()
       sys.stdout.flush()


   def get_options():
       optParser = optparse.OptionParser()
       optParser.add_option("--nogui", action="store_true",
                     default=False, help="run the commandline version of sumo")
       options, args = optParser.parse_args()
       return options


# this is the main entry point of this script
   if __name__ == "__main__":
      options = get_options()

# this script has been called from the command line. It will start sumo as a
# server, then connect and run
      if options.nogui:
         sumoBinary = checkBinary('sumo')
      else:
          sumoBinary = checkBinary('sumo-gui')


     # this is the normal way of using traci. sumo is   started as a
     # subprocess and then the python script connects and runs
      sumoProcess = subprocess.Popen([sumoBinary, "-c",  "data2/cross.sumocfg", "--tripinfo-output","tripinfo.xml", "--remote-port",  str(PORT)], stdout=sys.stdout, stderr=sys.stderr)
      run()
      sumoProcess.wait()

Thanks for help in advance.

Regards,

can you fix the indentation in your code – joel goldstick Jul 18 '16 at 14:09 — joel goldstick, Jul 18 '16 at 14:09

score 0 · Answer 1 · answered Jul 18 '16 at 21:23

You probably want to have have the value every 60 simulation seconds not every 60 wallclock seconds, so a timer is pointless here. Simply ask for the value after 60 simulation steps (assuming you use sumo's default step length of one second). So you could write something like:

     if step % 60 == 0:
         print >> steps , "nombre des veh : " + k

This will print the value for the last step every 60 steps. If you want the value for the last minute you need to aggregate (sum up) yourself.

The out put file contain just one line that is say one step. — mk10, Jul 19 '16 at 10:40

Number of vehicles each T seconds

1 Answers1