San Francisco voters have approved Proposition K, a ballot measure that will permanently close a 2-mile stretch of the Great Highway along Ocean Beach to cars. The measure, which passed with 54% of the vote in returns released Saturday, will ban vehicles on the westernmost coastal boulevard between Lincoln Way and Sloat Boulevard, opening it for bikes and pedestrians. The decision has sparked controversy, with many residents of the Sunset District, who opposed the measure, expressing concerns about longer commutes and increased traffic on side streets. Supervisor Joel Engardio, who supported Prop K, may face political repercussions from his constituents.