Always ask for a transfer/fare receipt, even if you are not going to transfer. Transfer/fare receipts are valid for 90 minutes.
sfmuni.com has a text description of the 29-line
29: Timed Evening Service Connections
- T-Timed Transfer Connection between Northbound 29 and Northbound 28 19th Avenue at 19th Avenue & Holloway
- T-Timed Transfer Connection between Southbound 29 and Southbound 28 19th Avenue at 19th Avenue & Holloway
29: Evening service north of Geary
Terminal on 25th Avenue is at Geary instead of California after 7:00 p.m. Lincoln and Pershing service is provided on the Northbound trip.
29: Letterman early-morning service
First 2 trips from Letterman Center wait up to 4 minutes for connection with 82X from Caltrain.
Buses and F-line: Always ask for a transfer, even if you are not going to transfer to another line.