View of a grade separation over a street and railroad tracks, ca.1930-1949 

N and O Streets grade separation over Santa Fe Railroad tracks, October 1936 

Grade separation at Figueroa and Temple, 1930-1949 

Road and a railroad track passing under a bridge in a mountainous area, [s.d.] 

Concrete viaduct crossing a street and railroad tracks, [s.d.] 

View of railroad tracks passing under a wooden viaduct in Los Angeles, [s.d.] 

View of railroad tracks under a concrete viaduct in Los Angeles, [s.d.] 

Concrete viaduct crossing a street and railroad tracks, [s.d.] 

Pacific Electric grade separation over Mission Road, [s.d.] 

Railroad bridge grade separation on an unknown street, ca.1930-1939 

View of Soto Street grade separation after consturction under the Union Pacific Railroad tracks, 1937 

View of Downey Road and the Union Pacific grade separation in Vernon, May 16, 1928 

Macy Street grade separation, looking west, 1930-1939 

Street passing under the Fourth Street Viaduct, [s.d.] 

Train tracks passing under a viaduct in Los Angeles, [s.d.] 

Macy Street grade separation, looking west, August 1937 

Birdseye view of a construction project near railroad tracks in Los Angeles, [s.d.] 

Pacific Electric grade separation over Mission Road, showing detail of north end of structure, May 5, 1937 

Mount Tamalpais railroad track, 1910 

View of the Tunnel Station Bridge over the Southern Pacific Railroad tracks in the San Fernando Valley, December 13, 1935