Fifteen cyclists have been killed by motorists this year - a 50% increase over last year's totals. Vision Zero, a top-down approach to street safety, was supposed to make conditions better, but are they actually getting worse? MacKenzie talks to the editor-in-chief of StreetsBlog, and a safe-streets advocate about Mayor De Blasio's signature "accomplishment," and what the city can do to make sure the roadways are increasingly bike and pedestrian friendly.