Image: circa 1940, from https://www.kcet.org/shows/lost-la/las-first-freeways
Construction proceeded during 1939 to create one of Los Angeles’ first freeways. The roadways through the Cahuenga Pass were separated by Pacific Electric trolley tracks in the median. This scene is looking northwest. It is “out of the picture” toward Los Angeles in the 1939 construction photo shown below.
Image: Dec. 30, 1939 USC digital archive/California Historical Society Collection, 1860-1960
via http://www.skyscraperpage.com/forum/showthread.php?p=6484850 .