VLMPlanner: Integrating Visual Language Models with Motion Planning

• URL: http://arxiv.org/abs/2507.20342v1
• Date: Sun, 27 Jul 2025 16:15:21 GMT
• Title: VLMPlanner: Integrating Visual Language Models with Motion Planning
• Authors: Zhipeng Tang, Sha Zhang, Jiajun Deng, Chenjie Wang, Guoliang You, Yuting Huang, Xinrui Lin, Yanyong Zhang,
• Abstract summary: VLMPlanner is a hybrid framework that combines a learning-based real-time planner with a vision-language model (VLM) capable of reasoning over raw images.<n>We develop the Context-Adaptive Inference Gate mechanism that enables the VLM to mimic human driving behavior.
• Score: 18.633637485218802
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Integrating large language models (LLMs) into autonomous driving motion planning has recently emerged as a promising direction, offering enhanced interpretability, better controllability, and improved generalization in rare and long-tail scenarios. However, existing methods often rely on abstracted perception or map-based inputs, missing crucial visual context, such as fine-grained road cues, accident aftermath, or unexpected obstacles, which are essential for robust decision-making in complex driving environments. To bridge this gap, we propose VLMPlanner, a hybrid framework that combines a learning-based real-time planner with a vision-language model (VLM) capable of reasoning over raw images. The VLM processes multi-view images to capture rich, detailed visual information and leverages its common-sense reasoning capabilities to guide the real-time planner in generating robust and safe trajectories. Furthermore, we develop the Context-Adaptive Inference Gate (CAI-Gate) mechanism that enables the VLM to mimic human driving behavior by dynamically adjusting its inference frequency based on scene complexity, thereby achieving an optimal balance between planning performance and computational efficiency. We evaluate our approach on the large-scale, challenging nuPlan benchmark, with comprehensive experimental results demonstrating superior planning performance in scenarios with intricate road conditions and dynamic elements. Code will be available.

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