I’m not 100% sure, but I suspect/assume this photo was taken on some high perch somewhere at the Hollywood Bowl (or perhaps zooming in from the Jerome C. Daniel Overlook northwest of the Bowl?) We can see George Stanley’s 15-foot white granite “Muse of Music, Dance Drama” statue that stands at the start of the Bowl’s driveway. It was dedicated on July 8, 1940. We can also see the French Village that used to stand opposite the Bowl on the east side of Highland where the Hollywood Barn now stands. It was demolished in 1951. So my best guess is that this photo was taken some time in the 1940s—during peak hour if the back up on the Hollywood Freeway is anything to go by!
Here is an aerial photo of the French Village opposite the Hollywood Bowl: