Free rides from Muni, Caltrain and SamTrans, plus late-night service on BART, are among the many perks being offered to public transit passengers for New Year’s Eve.

Here’s a look at what to expect tonight and early Tuesday morning:

• Muni: Service throughout the system will be free from 8 p.m. to 6 a.m. Muni Metro service between the West Portal and Embarcadero stations will be extended until 4 a.m. Metro service to the station at Fourth and King streets, where Caltrain is located, will run until 2:15 a.m. And service on Muni’s late-night bus lines will be increased. After 4 p.m., bus service will replace streetcars on Market Street.
• BART: Trains will run every 20 minutes, with service extended until 3 a.m. Starting at 8 p.m. to ease congestion, trains from Pittsburg/Bay Point and Richmond will make their first stop at the Montgomery Street station. Trains from Fremont and Dublin/Pleasanton will first stop at the Embarcadero station. Longer trains will be used to carry extra passengers following the fireworks show on The Embarcadero.
• Caltrain: Passengers will ride for free starting at 11 p.m. Four extra southbound trains will be added, with the last line departing San Francisco at 2:15 a.m.
• SamTrans: Service will be free between 11 p.m. and 2 a.m.
• Golden Gate Transit: Buses will run on a normal schedule, while ferries from Larkspur and Sausalito will run on a reduced holiday schedule.
• AC Transit: Buses will operate on a normal schedule.

wreisman@sfexaminer.com