Overview
- Waymo and Delft University of Technology published a Nature Communications paper on Wednesday and released the Reference Driver research code under an academic, non‑commercial license for research and teaching use.
- The Reference Driver uses an active‑inference framework to recreate how human drivers anticipate risks and register internal 'surprise' before collisions, not just last‑second reactive moves.
- Waymo says the model is meant to produce apples‑to‑apples comparisons by simulating what a competent human would have done in each exact robotaxi scenario rather than relying on broad fleet crash rates.
- Independent researchers and safety experts say the benchmark will need outside access, peer review, and stress‑testing to be trusted, and federal NHTSA and NTSB probes of a January Santa Monica robotaxi crash are still open.
- Waymo frames the work with its fleet safety figures—over 170 million miles and lower police‑reported crash and serious‑injury proxies—but the company’s geofenced operations and the code’s non‑commercial license could limit how quickly regulators and outside teams can validate the model.