Commentary: Shared autonomous vehicles could do more harm than good

This transportation revolution may seem like a positive development, but without careful planning, it could end up doing more harm than good.
It’s true that shared autonomous vehicles have the potential to make road travel faster, easier and cleaner. Yet, there are reasons to suspect they could actually lead to heavier traffic, dirtier air and more greenhouse gas emissions. Transportation accounts for 27 percent of U.S. greenhouse gas emissions, so the environmental stakes are high. Now is the time to ensure that these shared autonomous vehicles contribute to a sustainable transportation future.