BLInD: Learning Driver Intent as a Distribution over Future Ego Trajectories
Organizations: Wayve Technologies
Abstract
We present BLInD (Blind Learned Intent Distribution), a compact network that maps recent vehicle-state history (e.g. speed, curvature, indicator, and vehicle type) to a top-k distribution of future ego trajectories, with no camera, LiDAR, map, or object-track inputs. We find that vehiclestate history alone is sufficient to learn a useful multimodal distribution over near-term ego trajectories, and its low-latency nature makes it well-suited for safety-critical deployment. We investigate two distribution architectures, autoregressive (AR) and flow-matching, and train on both mixed-platform opensource and Wayve datasets. Both generalize without datasetspecific adaptation; the flow-matching model achieves best topk ADE/FDE of 0.15/0.37 m on Wayve, 0.15/0.36 m on Waymo, and 0.28/0.59 m on nuScenes, with the AR model reaching comparable coverage. Integrating the distributions into an AEB trigger task, a strict all-candidates policy reduces false positives from 1.51% to 0.11% with AR (13.7x reduction, 94.9% TP) and to 0.06% with flow-matching (25.1x reduction, 98.7% TP) compared to a 1-CTRV policy with 100% true positive score. BLInD runs in 0.87 ms with the AR head and 2.9 ms with the flow-matching head on an NVIDIA DRIVE Orin ECU making it compatible with real-time deployment on automotive ECUs. While existing learned distribution models rely on scene context and blind vehicle-state models typically collapse to a single path, BLInD is learned, blind, and cross-domain simultaneously, a combination not demonstrated by prior work. These results show that such a distribution provides a controllable and plausible intent sampling interface for downstream systems, with AEB as one instantiation.
Figures & tables
| Method | Dataset | |||
|---|---|---|---|---|
| CTRV top- | Wayve | 2.38/2.88/62.4 | 2.30/2.64/53.2 | 2.24/2.45/46.7 |
| Waymo | 1.54/1.95/43.7 | 1.54/1.94/43.3 | 1.53/1.91/42.4 | |
| nuScenes | 1.31/1.77/38.6 | 1.30/1.74/37.8 | 1.30/1.72/36.9 | |
| AR OS mix w/ ind. | Wayve | 0.31/0.89/5.8 | 0.20/0.53/ 1.5 | 0.16/0.43/ 0.9 |
| Waymo | 0.28 / 0.73 / 6.3 | 0.21/0.51/ 2.6 | 0.17/0.42/ 1.8 | |
| nuScenes | 0.44 / 1.05 / 13.1 | 0.27 / 0.60 / 3.5 | 0.24 / 0.52 / 2.5 |
| Method | |||
|---|---|---|---|
| CTRV top- | 100.0 /1.51 | 34.7/0.65 | 29.5/0.07 |
| AR OS mix w/ ind. | 94.9/2.09 | 94.9/0.27 | 94.9/0.11 |
| Flow OS mix w/ ind. | 99.7/ 0.35 | 99.0 / 0.11 | 98.7 / 0.06 |
Vehicle Trajectory Prediction
Vehicle trajectory prediction forecasts how vehicles will move from their histories, road maps, traffic interactions, and driving intentions.
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