View of viaduct over the Los Angeles River on Aliso Street, Los Angeles, 1923 

View of First Street viaduct over the Los Angeles River, looking east from near west end of viaduct, Los Angeles, 1923 

View of bridge over the Los Angeles River on Macy Street, from east side, Los Angeles, 1923 

View showing bridge over the Los Angeles River at Ninth Street, and automobile traffic, Los Angeles, 1923 

New 7th Street viaduct over Los Angeles River, Los Angeles, 1930 

Old 4th Street viaduct over Los Angeles River, Los Angeles, 1930 

East 7th Street showing congestion at crossing with railroad tracks at L.A. River, Los Angeles, 1925 

Washington Street bridge over Los Angeles River, Los Angeles, 1934 

Sixth Street viaduct over Los Angeles River, Los Angeles, 1938 

Sixth Street viaduct over Los Angeles River, Los Angeles, 1938 

Bridge over the Los Angeles River on East Ninth Street, Los Angeles, 1923 

Soto Street viaduct over Ramona Boulevard, Los Angeles, 1938 

Traffic congestion at the intersection of Central and Slauson Avenue, caused largely by reason of excavation across Slauson Avenue, Los Angeles, 1923 

Viaduct over Pico Boulevard at San Vicente from center line of Pico Boulevard west of crossing looking east at new viaduct, Los Angeles, 1927 

General view of Pacific Electric crossing with Pico Boulevard just west of 16th Street viaduct, Los Angeles, 1923 

View looking east from Ocean Avenue viaduct over P.E. Railway, Santa Monica, Los Angeles County, 1927 

Viaduct over Pico Boulevard at San Vicente from center of Pico Boulevard east of viaduct looking west along Pico Boulevard, Los Angeles, 1927 

Bridge over Los Angeles River on East 26th Street, Los Angeles, 1934 

View looking east from Second Street viaduct over P.E.Ry., Santa Monica, Los Angeles County, 1927 

View looking north from 4th Street Viaduct over ravine and Lorena Street, Los Angeles, 1937