This rulemaking would largely codify NHTSA Standing General Order 2021-01 requiring certain manufacturers and operators of motor vehicles and motor vehicle equipment with ADS or Level 2 ADAS to report specified information about certain safety-related incidents involving vehicles (including prototype vehicles) operating on publicly accessible roads using ADS or Level 2 ADAS. The rulemaking would also consider some refinements to the existing reporting requirements, including proposals to potentially expand the scope of what incidents are reported and requiring reporting of deployed fleet numbers and vehicle miles traveled (VMT). The proposed rule would enhance both safety and transparency by providing the Agency with robust cadence of critical and timely safety data that will also be made available to the public, consistent with law.