Then ... Fleeing from the reporters, Val, driving her sister Arlene's car, heads north on Gough Street, about to turn right into Washington, here passing the corner steps at Lafayette Park.
... and Now, this is the northeast corner of the park (map).
A word about the car that Val is driving: it's a 1932 Packard Twin Six coupe roadster, affordable only by the moneyed set including the actor Clark Gable who paid $4,250 for his when just 2 years into his MGM contract. When he posed for this photograph below in 1933 he had added wheel discs and a rear-mounted trunk.
Incidentally, the same car, refinished and reupholstered, won First in Class at the Pebble Beach Concours d'Elegance in 2009 then was sold for $1,210,000 at the 2016 RM Sotheby's auction at Amelia Island, below.
Then ... On Washington Street a cable car rumbles downhill past the Crest View Garage, far left, as she turns into her own garage, far right. In the movie her garage is part of her mansion home, but in the real world this location is a block away from the mansion which, as we saw earlier was at the corner of Washington and Laguna at the other end of the park.
... and Now, Washington Street lost its cable car line in 1956 but the garage building on the left is still there, now privately used by residents of the adjacent CrestView Apartments. The building at right, 2080 Gough Street, was replaced in 1963; its side garage is at the same spot as was the Bradford's garage.
After Val takes an elevator up to her room prying reporters open the rumble seat of the car and are shocked to find the lifeless body of Arlene Bradford stuffed inside. They take a grisly photograph and decide to hold off informing the police until their newspaper breaks the sensational story.