The first of the new Muni Metro trains to enter service as it approaches Duboce Park.

The SFMTA expects to have regulatory approval for several more in the coming weeks, after which they will need additional approval to run in two and three-car consists. We just might see those three-car N-Judah trains we were promised before the end of the year.

Once the SFTMA has made it through the first batch (which always takes the most time) the manufacturing, testing, and approvals will fall into a rhythm, adding a new car every few weeks.

By the end of 2018, they should be up to 24. The SFMTA has ordered 215 of the new Siemens-made light-rail vehicles, with an option for an additional 45.