RRB

The official code for the paper: "Injecting Knowledge in Data-driven Vehicle Trajectory Predictors", Published in Transportation research part C, 2021. Webpage , Paper , arXiv

 

Abstract:

Vehicle trajectory prediction tasks have been commonly tackled from two distinct perspectives: either with knowledge-driven methods or more recently with datadriven ones. On the one hand, we can explicitly implement domain-knowledge or physical priors such as anticipating that vehicles will follow the middle of the roads. While this perspective leads to feasible outputs, it has limited performance due to the difficulty to hand-craft complex interactions in urban environments. On the other hand, recent works use data-driven approaches which can learn complex interactions from the data leading to superior performance. However, generalization, i.e., having accurate predictions on unseen data, is an issue leading to unrealistic outputs. In this paper, we propose to learn a "Realistic Residual Block" (RRB), which effectively connects these two perspectives. Our RRB takes any off-the-shelf knowledge-driven model and finds the required residuals to add to the knowledge-aware trajectory. Our proposed method outputs realistic predictions by confining the residual range and taking into account its uncertainty. We also constrain our output with Model Predictive Control (MPC) to satisfy kinematic constraints. Using a publicly available dataset, we show that our method outperforms previous works in terms of accuracy and generalization to new scenes.

Installation

virtualenv -p /usr/bin/python3.6 rrb_env
source rrb_env/bin/activate
pip install -e trajnetbaselines/
pip install -e trajnettools/
pip install -e trajnetdataset/

Model Training

You can specify code parameters in the bash.sh file. To train the network, simply run:

bash run.sh

Model Evaluation

cd trajnetbaselines
python -m trajnetbaselines.eval --model-add <add-to-model>

You can evaluate the pre-trained models available in this repo with commands like this:

python -m trajnetbaselines.eval --model-add 'output/final_models/RRB/RRB_M_sceneGeneralization'

Citation:

@article{bahari2021injecting,
title = {Injecting knowledge in data-driven vehicle trajectory predictors},
journal = {Transportation Research Part C: Emerging Technologies},
volume = {128},
pages = {103010},
year = {2021},
issn = {0968-090X},
doi = {https://doi.org/10.1016/j.trc.2021.103010},
url = {https://www.sciencedirect.com/science/article/pii/S0968090X21000425},
author = {Mohammadhossein Bahari and Ismail Nejjar and Alexandre Alahi},
}

contact:

[email protected]