The National Highway Traffic Safety Administration announced a new “voluntary national framework for the evaluation and oversight” of autonomous vehicles, a bureaucratic first step that could eventually open the floodgates for fully driverless cars. But there’s a twist: the agency wants self-driving car companies to cough up more data. The proposed rules were first announced last year as the ADS-Equipped Vehicle Safety, Transparency and Evaluation Program, also known as AV STEP. This program wou...