The N Judah is a hybrid light rail/streetcar line of the Muni Metro system in San Francisco, California.

[3] It is the busiest line in the Muni Metro system, serving an average of 41,439 weekday passengers in 2013.

[12] The changes were unpopular with the public; they caused severe delays in the Market Street subway and forced N Judah riders to transfer to reach the Caltrain station when they previously did not.

On June 30, 2007, Muni reversed several of the changes; the J Church and N Judah were restored to their previous configuration.

[13] On December 5, 2009, the N Judah was cut to Embarcadero on weekends as part of widespread service reductions.

It follows the western end of the N Judah route from Ocean Beach to 19th Avenue, then operates nonstop from there to the Financial District where it stops at Bush and Montgomery Streets.

In September 2016, Muni began running a pair of one-car shuttles between Embarcadero station and Carl and Hillway during morning rush hour to reduce crowding on the inner section of the line.

[17] A study after one month showed the shuttles had increased capacity on the inner part of the line by 18% and reduced the number of passengers unable to board overcrowded trains by 63%.

[21][22] Light-rail service was re-replaced with buses on August 25 due to issues with malfunctioning overhead wire splices and the need to quarantine control center staff after a COVID-19 case.