Though dimly lit and hard to make out, this photo glows with atmosphere. The (rather brave, I think) photographer was standing on the tracks that those four Pacific Electric Red Cars were about to take to Glendale and Hollywood. This photo was taken in the Subway Terminal building, which was Pacific Electric’s streetcar hub at 4th and Hill Streets in downtown Los Angeles. I couldn’t find a date on this image, but this was a busy operation from 1925 to 1955, constantly filled with Angelenos coming into downtown for work, entertainment, and shopping because up to, during, and immediately after WWII, downtown LA was the center of the city and subways were a convenient way to get there.
Source: https://waterandpower.org/