GraphPilot: Grounded Scene Graph Conditioning for Language-Based Autonomous Driving

• URL: http://arxiv.org/abs/2511.11266v1
• Date: Fri, 14 Nov 2025 12:57:39 GMT
• Title: GraphPilot: Grounded Scene Graph Conditioning for Language-Based Autonomous Driving
• Abstract summary: Vision-language models have emerged as promising planners for autonomous driving.<n>Models are typically trained without supervision that explicitly encodes relational dependencies.<n>We present a novel model-agnostic method that conditions language-based driving models on structured relational context in the form of traffic scene graphs.
• Score: 16.932009464531735
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Vision-language models have recently emerged as promising planners for autonomous driving, where success hinges on topology-aware reasoning over spatial structure and dynamic interactions from multimodal input. However, existing models are typically trained without supervision that explicitly encodes these relational dependencies, limiting their ability to infer how agents and other traffic entities influence one another from raw sensor data. In this work, we bridge this gap with a novel model-agnostic method that conditions language-based driving models on structured relational context in the form of traffic scene graphs. We serialize scene graphs at various abstraction levels and formats, and incorporate them into the models via structured prompt templates, enabling a systematic analysis of when and how relational supervision is most beneficial. Extensive evaluations on the public LangAuto benchmark show that scene graph conditioning of state-of-the-art approaches yields large and persistent improvement in driving performance. Notably, we observe up to a 15.6\% increase in driving score for LMDrive and 17.5\% for BEVDriver, indicating that models can better internalize and ground relational priors through scene graph-conditioned training, even without requiring scene graph input at test-time. Code, fine-tuned models, and our scene graph dataset are publicly available at https://github.com/iis-esslingen/GraphPilot.

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