RetroMotion: Retrocausal Motion Forecasting Models are Instructable

• URL: http://arxiv.org/abs/2505.20414v1
• Date: Mon, 26 May 2025 18:05:59 GMT
• Title: RetroMotion: Retrocausal Motion Forecasting Models are Instructable
• Authors: Royden Wagner, Omer Sahin Tas, Felix Hauser, Marlon Steiner, Dominik Strutz, Abhishek Vivekanandan, Carlos Fernandez, Christoph Stiller,
• Abstract summary: We develop a multi-task learning method for motion forecasting that includes a retrocausal flow of information.<n>Our method generalizes well to the Argoverse 2 dataset.<n>Our experiments show that regular training of motion forecasting leads to the ability to follow goal-based instructions.
• Score: 11.883714030537028
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Motion forecasts of road users (i.e., agents) vary in complexity as a function of scene constraints and interactive behavior. We address this with a multi-task learning method for motion forecasting that includes a retrocausal flow of information. The corresponding tasks are to forecast (1) marginal trajectory distributions for all modeled agents and (2) joint trajectory distributions for interacting agents. Using a transformer model, we generate the joint distributions by re-encoding marginal distributions followed by pairwise modeling. This incorporates a retrocausal flow of information from later points in marginal trajectories to earlier points in joint trajectories. Per trajectory point, we model positional uncertainty using compressed exponential power distributions. Notably, our method achieves state-of-the-art results in the Waymo Interaction Prediction dataset and generalizes well to the Argoverse 2 dataset. Additionally, our method provides an interface for issuing instructions through trajectory modifications. Our experiments show that regular training of motion forecasting leads to the ability to follow goal-based instructions and to adapt basic directional instructions to the scene context. Code: https://github.com/kit-mrt/future-motion

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