In this technical report, we present the 2nd place solution of 2023 Waymo Open Sim Agents Challenge (WOSAC)[4]. We propose a simple yet effective autoregressive method for simulating multi-agent behaviors, which is built upon a well-known multimodal motion forecasting framework called Motion Transformer (MTR)[5] with postprocessing algorithms applied. Our submission named MTR+++ achieves 0.4697 on the Realism Meta metric in 2023 WOSAC. Besides, a modified model based on MTR named MTR_E is proposed after the challenge, which has a better score 0.4911 and is ranked the 3rd on the leaderboard of WOSAC as of June 25, 2023.
@article{arxiv.2306.15914,
title = {The 2nd Place Solution for 2023 Waymo Open Sim Agents Challenge},
author = {Cheng Qian and Di Xiu and Minghao Tian},
journal= {arXiv preprint arXiv:2306.15914},
year = {2023}
}