This is the GitHub repository for our conference paper "User-Centric Green Light Optimized Speed Advisory with Reinforcement Learning" presented at the ITSC 2023.
Our research addresses Green Light Optimized Speed Advisory (GLOSA), an application in the field of Intelligent Transportation Systems (ITS) for improving traffic flow and reducing emissions in urban areas. We aim at improving GLOSA, both by including traffic condition information, more specifically queue length, into the calculation of an optimal speed as well as by applying Reinforcement Learning (RL). Doing so, we incorporate rule-based classic GLOSA and RL-based GLOSA in a common comparable SUMO simulation environment.
The code is executable for different SUMO versions, but the results slightly differ depending on the version. In our study, we used SUMO 1.11.0. Also, we recommend using Python 3.10.
The main component for executing the code is the run.py file. The desired approach, rule-based classic or RL-based GLOSA, as well as other relevant parameters such as step size can be defined within the config.ini file.
The classic approach can be run directly without any training. To do so, the variable glosa_agent within the config.ini must be set to classic.
The core component is the GLOSA_agent class within glosa.py. Here, the optimal speed is determined based on the observed state, more precisely the upcoming traffic light phases, and other parameters from the simulation, such as information on preceding vehicles or red phase duration.
The RL-based glosa requires a training of the agent to learn a good glosa policy given the current state. To do so, the variable glosa_agent within the config.ini must be set to rl and set the RL-Training, RL-State and RL-Reward parameters within the config.ini file. Once those parameters are set, the training can be started by executing the run.py file which then uses our common GLOSA environment and the stable baselines3 library to train the agent. All results of the training and the evaluation are stored in the results folder.
This repository requires that you already have installed the SUMO traffic simulator. For more information on how to install SUMO, please refer to https://sumo.dlr.de/docs/Installing.html.
git clone https://github.com/urbanAIthi/GLOSA_RL.git
cd GLOSA_RL
conda env create -f environment.yml
conda activate glosa_rl env
# get the stable baselines3 library
git clone https://github.com/DLR-RM/stable-baselines3.git
If you use this code in your research, please cite our paper:
@inproceedings{schlamp2023GLOSA-RL,
title={User-Centric Green Light Optimized Speed Advisory with Reinforcement Learning},
author={Schlamp, Anna-Lena and Gerner, Jeremias and Bogenberger, Klaus and Schmidtner, Stefanie},
booktitle={26th IEEE International Conference on Intelligent Transportation Systems (ITSC)},
year={2023},
address={Bilbao, Bizkaia, Spain},
month={24-28 September},
publisher={IEEE}
}This work uses a cutout of the SUMO simulation network provided in: https://github.com/TUM-VT/sumo_ingolstadt.git
The RL-based GLOSA approach incorporates RL-algorithms from Stable Baselines3: https://github.com/DLR-RM/stable-baselines3
This project is licensed under the MIT License - see the LICENSE.md file for details.