Muni, owner-operator of the cable cars and historic streetcars, joins with the nonprofit Market Street Railway every year for a weekend celebrating San Francisco’s transit heritage. Come out Saturday-Sunday, September 23-24, from 10 am-4 pm each day to ride rarely-operated historic streetcars and vintage bus rides originating at the San Francisco Railway Museum. Unique survivor cable cars Sacramento-Clay “Big 19” and O’Farrell, Jones & Hyde Car 42 will operate both days on the California Street line too. Here’s detailed information.