VLM-AutoDrive: Post-Training Vision-Language Models for Safety-Critical Autonomous Driving Events

• URL: http://arxiv.org/abs/2603.18178v1
• Date: Wed, 18 Mar 2026 18:23:34 GMT
• Title: VLM-AutoDrive: Post-Training Vision-Language Models for Safety-Critical Autonomous Driving Events
• Abstract summary: We introduce VLM-AutoDrive, a modular framework for adapting pretrained Vision-Language Models to high-fidelity anomaly detection.<n>Off-the-shelf VLMs such as NVIDIA's Cosmos-1 7B (CR1) exhibit near-zero Collision recall in zero-shot settings.<n>VLM-AutoDrive offers a scalable recipe for adapting general-purpose VLMs to safety-critical, temporally localized perception tasks.
• Score: 25.118024547769895
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The rapid growth of ego-centric dashcam footage presents a major challenge for detecting safety-critical events such as collisions and near-collisions, scenarios that are brief, rare, and difficult for generic vision models to capture. While multimodal large language models (MLLMs) demonstrate strong general reasoning ability, they underperform in driving contexts due to domain and temporal misalignment. We introduce VLM-AutoDrive, a modular post-training framework for adapting pretrained Vision-Language Models (VLMs) to high-fidelity anomaly detection. The framework integrates metadata-derived captions, LLM-generated descriptions, visual question answering (VQA) pairs, and chain-of-thought (CoT) reasoning supervision to enable domain-aligned and interpretable learning. Off-the-shelf VLMs such as NVIDIA's Cosmos-Reason1 7B (CR1) exhibit near-zero Collision recall in zero-shot settings; fine-tuning with VLM-AutoDrive improves Collision F1 from 0.00 to 0.69 and overall accuracy from 35.35% to 77.27%. VLM-AutoDrive offers a scalable recipe for adapting general-purpose VLMs to safety-critical, temporally localized perception tasks. Evaluated on real-world Nexar dashcam videos, it achieves substantial gains in Collision and Near-Collision detection while producing interpretable reasoning traces, bridging the gap between perception, causality, and decision reasoning in autonomous driving.

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