The newsstand displays a varied number of unsold copies of The New Yorker and Collier's magazines. Unsold magazines would have been returned to the distributor when new issues were delivered.
The squealing of tires of the runaway bus on unpaved roads.
For being set during World War 2, there sure was a lot of empty seats to be purchased at the last hour on a regularly scheduled bus going between major cities along the coast of California.