San Franciscans who park their cars within 20 feet of a crosswalk began receiving "written warnings" this week as city crews prepare to enforce California's "daylighting" law. Why it matters: The goal is to reduce traffic-related deaths and injuries by making it easier for drivers to see people crossing the street.

A two-mile stretch of coastal highway in San Francisco has become a battleground. Thanks to recently-passed Proposition K, part of the Great Highway along Ocean Beach will be permanently closed to cars – a result that is dividing many residents.