T-Third is the newest Muni rail line, which began running on January 13, 2007 but officially opened for full service on April 7, 2007. According to the Muni website, the new T line brought the city over 5 miles of new track and 18 new stations.
The T line services the following stations, intersections and points of interest, traveling outbound:
- Sunnydale
- Arleta
- Le Conte
- Gilman/Paul
- Carroll
- Williams
- Revere/Shafter
- Oakdale/Palou
- Kirkwood/La Salle
- Hudson/Innes
- Evans
- Marin Street
- 23rd Street
- 20th Street
- Mariposa
- UCSF Mission Bay
- Mission Rock
- Caltrain depot
- AT&T Park
- Embarcadero station
- Montgomery station
- Powell station
- Civic Center station
- Van Ness station
- Church station
- Castro station
Frequency guides
(information taken from Muni website)
Weekday
| First run | 7 am - 9 am | 9 am - 4 pm | 4 pm - 6/7 pm | Evening | Last run |
| 5:26 am | 10 minutes | 10 minutes | 8 minutes | 20 minutes | 12:45 pm |
Saturday
| First run | 7 am - 10 am | 10 am - 6 pm | Evening | Last run |
| 5:27 am | 14 minutes | 12 minutes | 20 minutes | 12:45 am |
Sunday
| First run | 7 am - 10 am | 10 am - 6 pm | Evening | Last run |
| 5:27 am | 15 minutes | 15 minutes | 20 minutes | 12:45 am |
