🚀News:

• 2024/03/05 LimSim++ is now released!
• 2023/07/26 Add the docs about co-sim with CARLA.
• 2023/07/13 The code is now released!

LimSim

LimSim is a Long-term Interactive Multi-scenario traffic Simulator, which aims to provide a continuous simulation capability under the complex urban road network.

Quick Start

• 3.9.0 <= Python <= 3.11.0
• SUMO >= 1.15.0

After configuring the runtime environment, download the LimSim source code to your local machine:

git clone https://github.com/PJLab-ADG/LimSim.git

Finally, you need to install the required Python extensions:

cd LimSim
pip install -r requirements.txt

Now, the local installation and deployment of LimSim are complete.

1. Real-time Sim

Real-time simulation following the Ego vehicle is the fundamental feature of LimSim. To experience it, run the following command:

python ModelExample.py

2. Simulation replay

In the root directory, running the following command will invoke LimSim's replay feature:

python ReplayExample.py

For more information of our code, please see our Online Documentation.

If you have any problem when installing and deployment, feel free to open an issue here!

🎁 Main Features

• Long-term: Traffic flow can be generated over long periods under the guidance of demand and route planning.

• Diversity: The built-in behavioral models take heterogeneous driving styles of vehicles into account.

• Interactivity: Vehicles in the scenario area are controlled address sophisticated interactions among vehicles.

• Multi-scenario: The universal road components supports a variety of road structures in the real world.

🖥️ GUI

LimSim has a cross-platform user-friendly GUI, which includes not only a beautiful simulation interface, but also information on road network and ego-vehicle status.

🛣️ Multi-scenarios support

LimSim supports road scenarios not limited to freeways, signalized intersections, roundabouts and overpasses.

📊 Scenario Evaluation

After running a long-term simulation with all kinds of scenarios contained in it, LimSim generates a log report and extract the key scenarios via the evaluation results.

💡Co-sim with SUMO & CARLA

LimSim supports co-simulation with CARLA and SUMO, guaranteeing that all three softwares show identical vehicle status. Please see the docs for more information.

➕Additional Maps

LimSim supports the freewayB and Expressway_A maps from the CitySim datasets. However, we have not included these two road network files in this library due to copyright.

To run these two maps, you need to:

1. Go to CitySim Repo and submit the data access form.
2. Get access to the dataset and download the .net.xml files in both the freewayB and Expressway_A data folders.
3. Copy the road network files (.net.xml) to the relevant networkFiles/CitySim folder and ensure that your file paths are as follows:

   networkFiles/CitySim/freewayB/freewayB.net.xml
   networkFiles/CitySim/Expressway_A/Expressway_A.net.xml
   

Acknowledgments

We would like to thank the authors and developers of the following projects, this project is built upon these great projects.

• SUMO (Simulation of Urban MObility)
• CitySim
• DearPyGUI

Contact

If you have any suggestions or collaboration about this repo, feel free to create a issue/PR or send email to us (wenlicheng@pjlab.org.cn).

Citation

If you use LimSim in your research , please use the following BibTeX entry.

@misc{wen2023limsim,
      title={LimSim: A Long-term Interactive Multi-scenario Traffic Simulator}, 
      author={Licheng Wen and Daocheng Fu and Song Mao and Pinlong Cai and Min Dou and Yikang Li and Yu Qiao},
      year={2023},
      eprint={2307.06648},
      archivePrefix={arXiv},
      primaryClass={eess.SY}
}

License

LimSim is released under the GNU GPL v3.0 license.