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Questions tagged [flow-project]

Computational framework for reinforcement learning in traffic control https://github.com/flow-project/flow

98 questions
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Errors in tutorial03_rlib

when running the tutorial03_rllib, I faced some errors. At step 4.2 (initializing Flow) the errors are: 2020-05-07 21:43:00,585 INFO node.py:498 -- Process STDOUT and STDERR is being redirected to…
Fabiana Fierro
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Sumo-gui does not open when running Flow examples

I have tried to install Flow and SUMO within Ubuntu 16.04 by following the steps listed in the documentation: https://flow.readthedocs.io/en/latest/flow_setup.html The issue I am facing arises when I reach "Testing your SUMO and Flow installation"…
Lost Fool
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Environment object is not subscriptable

I am following the tutorial on the web. When I tried to run the examples on the tutorials. On tutorial 1,5,6.There are similar errors: For tutorial 1,5: TypeError:'AccelEnv' object is not subscriptable. For tutorial 6: TypeError:'TestEnv' object is…
toby
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How to retrieve induction loop information in custom environment?

Hell guys, I am trying to set up my own environment to train traffic lights to optimize the traffic flow. To do this I want to use area lane detectors. In the flow tutorials and examples usually general information is retrieved from the whole…
Vallout
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'Observation outside expected value range' error when running example 'traffic_light_grid.py'

I'm trying to learn how to use FLOW. When I was trying to run 'flow/example/rllib/traffic_light_grid.py', it kept returning 'Observation outside expected value range' errors, until it reached the maximum error number. I have no idea why only this…
Ming
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Errors in tutorial_06 :FileNotFoundError

It can't generate .net.xml file after I run the command in tutorials 06: # create the environment env = TestEnv( env_params=env_params, sim_params=sim_params, network=network ) # run the simulation for 1000 steps exp =…
QMarkLi
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I would like to set the speed of a vehicle (or more) using Traci in Flow

I'm using Flow to create a traffic simulation and I should manage the speed of the vehicles using TraCi in a SUMO network designed by me. Unfortunately I cannot understand how to recall in my code the primitives of TraCi made available by FLOW. I…
gi95
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FLOW error when running “python examples/SUMO/highway.py”

(flow) lab@lab-500-471cn:~/flow/examples/sumo$ python highway_ramps.py netconvert: symbol lookup error: netconvert: undefined symbol: _ZN10OGRFeature16GetFieldAsStringEi Error during start: [Errno 2] No such file or directory:…
Y.Gou
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Error in creating a conda environment using 'python setup.py develop'

At first, after I run the command conda env create -f environment.yml. I recieve the following warning: Warning : you have pip-isntalled dependencies in your environment file, but you do not list pip itself as one of your conda…
QMarkLi
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Define inflow/s with different depart speeds

I want the vehicles in the inflow to drive constant speed but I want this constant speed to change between episodes (let's make this speed uniformly sampled between 10 m/s and 25 m/s). E.g. in episode #5 all vehicles drive in 12.3 m/s and in episode…
Gabizon
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Error processing event with use of ray's PPO algorithm

I am using the PPO algorithm - provided by ray - to train an RL agent to stabilize traffic. During the training process, I keep seeing ValueError('Observation outside expected value range', Box(500,) screenshot However, I don't know which part of my…
Isaac
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No module flow.controllers Aimsun/Flow-project

I can't run any of the flow-project examples for aimsun, even though I have followed all the installation steps. The error I get for the sugiyama example is No module named flow.controllers and No module flow.core.experiment for the small_template…
GeorgiaP
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Is dynamic user equilibrium (duaRouter) compatible with FLOW?

In the grid example, I found vehicles are not turning and routes are fixed. Is there any method to let vehicles iteratively find 'shortest path'? I mean, can we implement dynamic user equilibrium when using FLOW? SUMO provides duaIterate.py, can…
Pao Raw
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Adding bus stops to routes? (Flow, SUMO)

I want to create bus stops (or train stops). How can I do this in flow? SUMO has this Option: https://sumo.dlr.de/wiki/Simulation/Public_Transport, but routes do not seem to have this option (in Flow). I tried adding them nevertheless to the…
Who Knows
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Error when running green wave example script for rllib flow

I am trying to run the python green_wave rllib example to learn how to implement RL traffic lights and I can not manage to get any of the scripts to run. It gives me an error each time to say "Trials did not complete" and I don't know why. Here is…
Lottie Roman
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