Cities know street closures work to divert and calm car traffic, they shouldn't be shy about using diverters/closures for prioritizing the safety and convenience of people getting around on foot and on bike
Santa Monica's recently completed 17th Street bikeway improvements have a "region leading design" featuring Southern California's first protected "Dutch-style" intersections, plus concrete curb protection, and makes great connections to the city's growing bikeway network
Nearly completed, Santa Monica's excellent 17th Street bike/ped improvements include Southern California's first European-type curb-protected intersections