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Scalable End-to-End Autonomous Vehicle Testing via Rare-event Simulation
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Measured effects reported in the paper
| What was changed | Where | Measured | Effect |
|---|---|---|---|
| Use adaptive cross-entropy importance sampling instead of naive Monte Carlo | Rare-event evaluation in the highway simulator · Multi-agent highway | rare-event samples: 2-20 times | Helped |
| Use cross-entropy importance sampling with ρ=0.01 instead of naive Monte Carlo | Non-vision ego-vehicle policy · Multi-agent highway | dangerous scenarios sampled: 3-10 times | Helped |
| Use cross-entropy importance sampling with ρ=0.01 instead of naive Monte Carlo | Non-vision ego-vehicle policy · Multi-agent highway | variance reduction: 2-16 times variance reduction | Helped |
| Use cross-entropy importance sampling instead of naive Monte Carlo | Vision-based ego-vehicle policy · Multi-agent highway | dangerous scenarios sampled: up to 18 times | Helped |
| Decrease the quantile level ρ toward 0 (ablation) | Cross-entropy importance sampler · Non-vision ego-vehicle policy, multiple test thresholds | rare-event sampling frequency: 3-10 times | Helped |
| Select the iterate with the lowest ρ-quantile rather than the last iterate or Polyak averaging (ablation) | Cross-entropy importance sampler · Rare-event evaluation | performance | Helped |
| Reduce the per-iteration sample count to 100 (ablation) | Vision-policy cross-entropy importance sampler · Multi-agent highway, vision policy | dangerous-scenario sampling behavior | No clear effect |
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