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Hydra-NeXt: Robust Closed-Loop Driving with Open-Loop Training

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arxiv 2503.12030 v2 pith:76RHEMKL submitted 2025-03-15 cs.RO cs.CV

Hydra-NeXt: Robust Closed-Loop Driving with Open-Loop Training

classification cs.RO cs.CV
keywords closed-loopdrivingopen-loophydra-nexttrainingtrajectoryplanningprediction
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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End-to-end autonomous driving research currently faces a critical challenge in bridging the gap between open-loop training and closed-loop deployment. Current approaches are trained to predict trajectories in an open-loop environment, which struggle with quick reactions to other agents in closed-loop environments and risk generating kinematically infeasible plans due to the gap between open-loop training and closed-loop driving. In this paper, we introduce Hydra-NeXt, a novel multi-branch planning framework that unifies trajectory prediction, control prediction, and a trajectory refinement network in one model. Unlike current open-loop trajectory prediction models that only handle general-case planning, Hydra-NeXt further utilizes a control decoder to focus on short-term actions, which enables faster responses to dynamic situations and reactive agents. Moreover, we propose the Trajectory Refinement module to augment and refine the planning decisions by effectively adhering to kinematic constraints in closed-loop environments. This unified approach bridges the gap between open-loop training and closed-loop driving, demonstrating superior performance of 65.89 Driving Score (DS) and 48.20% Success Rate (SR) on the Bench2Drive dataset without relying on external experts for data collection. Hydra-NeXt surpasses the previous state-of-the-art by 22.98 DS and 17.49 SR, marking a significant advancement in autonomous driving. Code will be available at https://github.com/woxihuanjiangguo/Hydra-NeXt.

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Forward citations

Cited by 9 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. DriveVer: Lightweight Trajectory Evaluator as Test-Time Verifier for Autonomous Driving

    cs.CV 2026-07 unverdicted novelty 6.0

    DriveVer is a lightweight dual-head test-time verifier that predicts safety confidence scores and geometric refinement vectors for candidate trajectories, improving base planners on the NAVSIM benchmark.

  2. AlignDrive: Aligned Lateral-Longitudinal Planning for End-to-End Autonomous Driving

    cs.RO 2026-01 unverdicted novelty 6.0

    A cascaded end-to-end driving model conditions longitudinal planning on the lateral path via anchor-based regression and path-conditioned 1D displacement prediction, achieving SOTA driving score of 89.07 and 73.18% su...

  3. AlignDrive: Aligned Lateral-Longitudinal Planning for End-to-End Autonomous Driving

    cs.RO 2026-01 conditional novelty 6.0

    Conditioning speed planning on the predicted path and relabeling synthetic cut-ins yields SOTA Bench2Drive scores (DS 89.07, SR 73.18%).

  4. SimScale: Learning to Drive via Real-World Simulation at Scale

    cs.CV 2025-11 conditional novelty 6.0

    SimScale synthesizes unseen driving states from real logs via neural rendering and reactive environments, generates pseudo-expert trajectories, and shows that co-training on real plus simulated data improves planning ...

  5. DriveReward: A Comprehensive Dataset and Generative Vision-Language Reward Model for Autonomous Driving

    cs.CV 2026-06 unverdicted novelty 5.0

    Creates DriveReward dataset with counterfactual annotations and a 1B VLM reward model that outperforms larger VLMs on driving tasks and matches rule-based rewards in RL and trajectory scoring.

  6. SparseWorld: Enhancing End-to-End Autonomous Driving via World Models with Sparse Scene Representation

    cs.CV 2026-05 unverdicted novelty 5.0

    SparseWorld is a sparse world model with a Sparse Dreamer module that performs autoregressive rollout of future instances to refine motion prediction and planning, reporting 0.05% collision rate on nuScenes open-loop metrics.

  7. Causality-Aware End-to-End Autonomous Driving via Ego-Centric Joint Scene Modeling

    cs.RO 2026-05 unverdicted novelty 5.0

    CaAD adds ego-centric joint-causal modeling and causality-aware policy alignment to end-to-end driving, reporting Driving Score 87.53 and Success Rate 71.81 on Bench2Drive plus PDMS 91.1 on NAVSIM.

  8. Causality-Aware End-to-End Autonomous Driving via Ego-Centric Joint Scene Modeling

    cs.RO 2026-05 unverdicted novelty 5.0

    CaAD adds ego-centric joint-causal modeling and causality-aware policy alignment to end-to-end driving, reporting Driving Score 87.53 and PDMS 91.1 on Bench2Drive and NAVSIM.

  9. Do Open-Loop Metrics Predict Closed-Loop Driving? A Cross-Benchmark Correlation Study of NAVSIM and Bench2Drive

    cs.RO 2026-04 conditional novelty 4.0

    Cross-benchmark analysis of 8 methods shows NAVSIM PDM Score correlates with Bench2Drive Driving Score at Spearman ρ=0.90, with Ego Progress as the strongest single predictor and a simpler 3-metric formula matching th...