Proposition K would permanently close San Francisco's Great Highway to traffic and establish it as a public recreation space.

Fifteen propositions have qualified for San Francisco's November ballot, ranging from deferred retirement for police officers to decreasing the number of city commissions. Why it matters: That's a lot of propositions to research.

Voting has begun. Ballots are being dropped off by tireless US postal workers throughout the City, and San Franciscans have a once-in-a-lifetime opportunity to vote for one of their own