Until a couple of years ago, city workers were adding painted crosswalks all around Los Angeles, especially near schools, to help pedestrians find their way safely across busy streets. Then, more recently, the city started removing these crosswalks. Reportedly, statistics showed that drivers' behavior didn't change when crosswalks were added, while pedestrians got a false sense of security, thereby increasing the risk rather than decreasing it. Today I heard that a local school has a new "intelligent crosswalk", with hanging lights above it that flash when a pedestrian is sensed in the crosswalk. Maybe this will help, but it seems kind of expensive given how many thousands of crosswalks there are in the city. Can we technical thinkers come up with a more practical compromise?