In 2015, The National Highway Transportation Safety Administration published data showing the distribution of the most common pre-crash scenarios (PDF). For example, just four crash categories accounted for 84% of all crashes:
Waymo uses the 37 pre-crash scenarios based on the almost 6 million police-reported light vehicle crashes that NHTSA recommends for testing as a starting place. Waymo tests situations in which other road users create potentially dangerous situations, such as:
Avoiding these kinds of crash scenarios is an important goal for Waymo’s testing program.
Waymo has completed thousands of crash avoidance tests at its private test track. Each of these tests recreates a distinct driving scenario and allows Waymo to analyze its vehicles’ response. Waymo then uses its simulator to test these scenarios further and improve its overall software capabilities.
Safety is the core of Waymo’s mission. When Waymo started to develop this technology nearly a decade ago, it realized that just as it was inventing brand new, highly sophisticated technology, it would need to build its own safety program to match.
Waymo’s multi-layered approach to safety is influenced by a braintrust of NASA engineers, NHTSA safety experts, and specialists from defense and auto industries, among others. Together, they created a playbook for rigorous and comprehensive development and testing of this technology to evaluate safe performance.
Waymo has involved external experts to advise on safety-related aspects of its program and shared its views with federal and state regulators as well as organizations (e.g. SAE, VTTI, American Center for Mobility) interested in developing guidance and standards in this area.