1. National Highway Traffic Safety Administration (2013) Preliminary statement of policy concerning automated vehicles. National Highway Traffic Safety Administration, Washington, DC
2. Fagnant DJ, Kockelman K (2015) Preparing a nation for autonomous vehicles: opportunities, barriers and policy recommendations. Transp Res Part Policy Pract 77:167–181
3. National Highway Traffic Safety Administration (2018) Automated vehicles for safety.
https://www.nhtsa.gov/technology-innovation/automated-vehicles-safety
4. Waymo (2018) On the road.
http://www.waymo.com
5. National Highway Traffic Safety Administration (2016) 2015 Motor vehicle crashes: overview. National Highway Traffic Safety Administration, Washington, DC