https://www.cnbc.com/2017/09/12/transportation-secretary-elaine-chao-backs-voluntary-rules-for-self-driving-cars.html

U.S. Transportation Secretary Elaine Chao on Tuesday defended her department's decision to use voluntary guidelines instead of enforceable rules to regulate self-driving cars, saying a flexible approach was best for an emerging technology.

Chao also said the Trump administration would give preference in its forthcoming infrastructure plan to projects that promise technology innovation that could improve safety or advance the deployment of autonomous vehicles.