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 38-line
38: Alternate service available
- For Weekday and Saturday Limited Service, see 38L.
- For Weekday express Service, see 38AX and 38BX schedules.
38: Timed Owl Service Connections
- N - Eastbound 38 waits up to 3 minutes for connection with Southbound 90 Owl at Van Ness Avenue
- H - Westbound 38 waits up to 3 minutes for connection with Northbound 91 Owl at Kearny And Northbound 90 Owl at Van Ness
38: Evening Fort Miley service
After about 7:15 p.m., service to Fort Miley is only on request to operators on the 48th Avenue-Point Lobos branch. From Fort Miley, use the signal light to signal the operator to pick you up.
Buses and F-line: Always ask for a transfer, even if you are not going to transfer to another line.
