Hi, I am currently working on a traffic simulation project using SUMO and TraCI, and I have encountered an issue that I hope you can assist me with.
In my simulation, I want to model a scenario where a specific vehicle (with type "ego") stops on a two-way road with one lane per direction of travel, and the following vehicles overtake it by using the opposite lane. I have tried to implement this behaviour using the traci.vehicle.slowDown and traci.vehicle.setSpeed commands, but the following vehicles do not overtake the stopped vehicle as desired. I have attached the TraCI script and the corresponding .net, .rou, and .sumocfg files for your reference. Here is a brief summary of what I have tried: Using traci.vehicle.slowDown to gradually slow down the vehicle to a stop. Using traci.vehicle.setSpeed to set the speed of the vehicle to zero. In both cases, the target vehicle stops as expected, but the following vehicles do not overtake it. I have ensured that the road allows overtaking in the opposite lane and have experimented with various lane-changing parameters and models, but the issue persists. Is there a specific configuration or approach that would allow the following vehicles to overtake a stopped vehicle? I need to do this to study the operational impact of vehicles breaking down on such roads. Thank you in advance for your assistance. I look forward to hearing from you. Best *Don*
<?xml version="1.0" encoding="UTF-8"?> <!-- generated on 2023-08-12 02:36:48 by Eclipse SUMO netconvert Version 1.18.0 <configuration xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xsi:noNamespaceSchemaLocation="http://sumo.dlr.de/xsd/netconvertConfiguration.xsd";> <input> <node-files value="fivebyfive.nod.xml"/> <edge-files value="fivebyfive.edg.xml"/> </input> <output> <output-file value="fivebyfive3.net.xml"/> </output> <processing> <opposites.guess value="true"/> <lefthand value="true"/> </processing> <junctions> <no-turnarounds value="true"/> </junctions> </configuration> --> <net version="1.16" junctionCornerDetail="5" lefthand="true" limitTurnSpeed="5.50" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xsi:noNamespaceSchemaLocation="http://sumo.dlr.de/xsd/net_file.xsd";> <location netOffset="0.00,-0.00" convBoundary="0.00,-0.00,800.00,-0.00" origBoundary="0.00,0.00,800.00,0.00" projParameter="!"/> <edge id=":n_2_0" function="internal"> <lane id=":n_2_0_0" index="0" speed="13.89" length="0.10" shape="100.00,-1.60 100.03,-1.60"> <neigh lane=":n_2_1_0"/> </lane> </edge> <edge id=":n_2_1" function="internal"> <lane id=":n_2_1_0" index="0" speed="13.89" length="0.10" shape="100.03,1.60 100.00,1.60"> <neigh lane=":n_2_0_0"/> </lane> </edge> <edge id=":n_3_0" function="internal"> <lane id=":n_3_0_0" index="0" speed="13.89" length="0.10" shape="600.00,-1.60 600.01,-1.60"> <neigh lane=":n_3_1_0"/> </lane> </edge> <edge id=":n_3_1" function="internal"> <lane id=":n_3_1_0" index="0" speed="13.89" length="0.10" shape="600.01,1.60 600.00,1.60"> <neigh lane=":n_3_0_0"/> </lane> </edge> <edge id="-e_1" from="n_2" to="n_1" priority="-1" spreadType="center" shape="100.03,-1.60 0.00,-1.60"> <lane id="-e_1_0" index="0" speed="13.89" length="100.03" shape="100.03,-1.60 0.00,-1.60"> <neigh lane="e_1_0"/> </lane> </edge> <edge id="-e_2" from="n_3" to="n_2" priority="-1" spreadType="center" shape="600.01,-1.60 100.00,-1.60"> <lane id="-e_2_0" index="0" speed="13.89" length="500.01" shape="600.01,-1.60 100.00,-1.60"> <neigh lane="e_2_0"/> </lane> </edge> <edge id="-e_3" from="n_4" to="n_3" priority="-1" spreadType="center" shape="800.01,-1.60 600.00,-1.60"> <lane id="-e_3_0" index="0" speed="13.89" length="200.01" shape="800.01,-1.60 600.00,-1.60"> <neigh lane="e_3_0"/> </lane> </edge> <edge id="e_1" from="n_1" to="n_2" priority="-1" spreadType="center" shape="0.00,1.60 100.03,1.60"> <lane id="e_1_0" index="0" speed="13.89" length="100.03" shape="0.00,1.60 100.03,1.60"> <neigh lane="-e_1_0"/> </lane> </edge> <edge id="e_2" from="n_2" to="n_3" priority="-1" spreadType="center" shape="100.00,1.60 600.01,1.60"> <lane id="e_2_0" index="0" speed="13.89" length="500.01" shape="100.00,1.60 600.01,1.60"> <neigh lane="-e_2_0"/> </lane> </edge> <edge id="e_3" from="n_3" to="n_4" priority="-1" spreadType="center" shape="600.00,1.60 800.01,1.60"> <lane id="e_3_0" index="0" speed="13.89" length="200.01" shape="600.00,1.60 800.01,1.60"> <neigh lane="-e_3_0"/> </lane> </edge> <junction id="n_1" type="dead_end" x="0.00" y="-0.00" incLanes="-e_1_0" intLanes="" shape="0.00,-0.00 0.00,-3.20 0.00,0.00"/> <junction id="n_2" type="priority" x="100.00" y="-0.00" incLanes="-e_2_0 e_1_0" intLanes=":n_2_0_0 :n_2_1_0" shape="100.01,-3.20 100.01,3.20 100.01,-3.20"> <request index="0" response="00" foes="00" cont="0"/> <request index="1" response="00" foes="00" cont="0"/> </junction> <junction id="n_3" type="priority" x="600.00" y="-0.00" incLanes="-e_3_0 e_2_0" intLanes=":n_3_0_0 :n_3_1_0" shape="600.00,-3.20 600.00,3.20 600.00,-3.20"> <request index="0" response="00" foes="00" cont="0"/> <request index="1" response="00" foes="00" cont="0"/> </junction> <junction id="n_4" type="dead_end" x="800.00" y="-0.00" incLanes="e_3_0" intLanes="" shape="800.00,0.00 800.00,3.20 800.00,-0.00"/> <connection from="-e_2" to="-e_1" fromLane="0" toLane="0" via=":n_2_0_0" dir="s" state="M"/> <connection from="-e_3" to="-e_2" fromLane="0" toLane="0" via=":n_3_0_0" dir="s" state="M"/> <connection from="e_1" to="e_2" fromLane="0" toLane="0" via=":n_2_1_0" dir="s" state="M"/> <connection from="e_2" to="e_3" fromLane="0" toLane="0" via=":n_3_1_0" dir="s" state="M"/> <connection from=":n_2_0" to="-e_1" fromLane="0" toLane="0" dir="s" state="M"/> <connection from=":n_2_1" to="e_2" fromLane="0" toLane="0" dir="s" state="M"/> <connection from=":n_3_0" to="-e_2" fromLane="0" toLane="0" dir="s" state="M"/> <connection from=":n_3_1" to="e_3" fromLane="0" toLane="0" dir="s" state="M"/> </net>
fivebyfive.sumocfg
Description: Binary data
import traci
import os, sys
def run_simulation_slowDown(stop_time, simulation_end_time):
while traci.simulation.getTime() < simulation_end_time:
traci.simulationStep()
if traci.simulation.getTime() >= stop_time:
for vehicle in traci.vehicle.getIDList():
if traci.vehicle.getTypeID(vehicle) == "ego":
traci.vehicle.slowDown(vehicle, 0, 5)
traci.close()
def run_simulation_setSpeed(stop_time, simulation_end_time):
while traci.simulation.getTime() < simulation_end_time:
traci.simulationStep()
if traci.simulation.getTime() == stop_time:
for vehicle in traci.vehicle.getIDList():
if traci.vehicle.getTypeID(vehicle) == "ego":
# Disable all influencing factors on speed
# traci.vehicle.setSpeedMode(vehicle, 0)
# Set the speed to target_speed
traci.vehicle.setSpeed(vehicle, 0)
traci.close()
if 'SUMO_HOME' in os.environ:
tools = os.path.join(os.environ['SUMO_HOME'], 'tools')
sys.path.append(tools)
else:
sys.exit("please declare environment variable 'SUMO_HOME'")
# Check if we're in a virtual environment
if 'VIRTUAL_ENV' in os.environ:
sumoBinary = os.path.join(os.environ['VIRTUAL_ENV'], 'bin', 'sumo-gui')
else:
sumoBinary = "/home/don/.local/bin/sumo-gui" # to run sumo-gui
if not sumoBinary:
sys.exit("please set environment variable 'SUMO_BINARY'")
traci.start([sumoBinary, "-c", "fivebyfive.sumocfg"])
# Time at which vehicles should stop
stop_time = 50
# Time at which simulation should end
simulation_end_time = 3600
# Run the simulation using the slowDown function or the setSpeed function. Uncomment the one
# you want to use
# run_simulation_slowDown(stop_time, simulation_end_time)
run_simulation_setSpeed(stop_time, simulation_end_time)<routes>
<vType id="ego" maxSpeed="10" color="red"/>
<vType id="car" maxSpeed="16.67" color="yellow"/>
<route id="route0" edges="e_1 e_2 e_3"/>
<vehicle id="0" type="ego" route="route0" depart="0"/>
<vehicle id="1" type="ego" route="route0" depart="15"/>
<vehicle id="2" type="car" route="route0" depart="40"/>
<vehicle id="3" type="car" route="route0" depart="60"/>
<vehicle id="4" type="car" route="route0" depart="80"/>
</routes>
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