In Phoenix, a group of residents is taking a closer look at major city streets—7th Avenue and 7th Street— and asking: why do crashes keep happening here? Through a grassroots initiative called Safer 7s, the group Strong Towns Phoenix is analyzing nearly two decades of crash data on the city’s twin arterials, where reversible lanes are meant to speed up traffic but may be contributing to something else: a steady, predictable pattern of collisions. These stretches are magnets for people on foot and on bike—yet they’re designed primarily for vehicles, with narrow sidewalks and no bike lanes in sight.