Was the rapid transit first used in the 1920?

Rapid transit in London began with the opening in 1863 of the Metropolitan Railway, now part railway) opened in 1902; because large sections of the line were elevated, it was also called Hochbahn (high railway) until the 1920s

Rapid transit in London began with the opening in 1863 of the Metropolitan Railway, now part railway) opened in 1902; because large sections of the line were elevated, it was also called Hochbahn (high railway) until the 1920s