Studies have questioned whether red-light cameras increase safety, arguing that they cause motorists to stop too quickly. One thing’s for sure: if the city deliberately makes the yellow light extra short to catch motorists and raise revenue, that definitely hurts safety. And it turns out some cities did just that. Via BoingBoing.

David Alpert is Founder and President of Greater Greater Washington and Executive Director of DC Sustainable Transportation (DCST). He worked as a Product Manager for Google for six years and has lived in the Boston, San Francisco, and New York metro areas in addition to Washington, DC. He lives with his wife and two children in Dupont Circle. Unless otherwise noted, opinions in his GGWash posts are his and not the official views of GGWash or DCST.