unique names traci simulations

sumocr/interface/sumo_simulation.py

 import copy
 import logging
 import math
+import random
 import sys
+import time
 from collections import defaultdict
 from functools import lru_cache
 from typing import Dict, Union
@@ -40,7 +42,7 @@ __copyright__ = "TUM Cyber-Physical Systems Group"
 __credits__ = ["ZIM Projekt ZF4086007BZ8"]
 __version__ = "2021.1"
 __maintainer__ = "Moritz Klischat"
-__email__ = "commonroad-i06@in.tum.de"
+__email__ = "commonroad@lists.lrz.de"
 __status__ = "Released"
 
 
@@ -82,6 +84,7 @@ class SumoSimulation:
         self._lc_inaction = 0  # Flag indicates that SUMO is performing a lane change for the ego
         self.lateral_position_buffer = dict()  # stores lateral position [ego_vehicle_id,float]
         self.logger: logging.Logger = None
+        self._traci_label = None
         self.initialized = False
 
     @property
@@ -165,7 +168,7 @@ class SumoSimulation:
             np.random.seed(self.conf.random_seed)
             cmd.extend(['--seed', str(self.conf.random_seed)])
 
-        traci.start(cmd, label=self.conf.scenario_name)
+        traci.start(cmd, label=self.traci_label)
         # simulate until ego_time_start
         self.__presimulation_silent(self.conf.presimulation_steps)
 
@@ -259,6 +262,13 @@ class SumoSimulation:
 
         self._ego_vehicles[ego_vehicle.id] = ego_vehicle
 
+    @property
+    def traci_label(self):
+        """Unique label to identify simulation"""
+        if self._traci_label is None:
+            self._traci_label = self.conf.scenario_name + time.strftime("%H%M%S") + str(random.randint(0, 100))
+        return self._traci_label
+
     @property
     def ego_vehicles(self) -> Dict[int, EgoVehicle]:
         """