The scene when Regal first goes inside a building to visit his mother was filmed on Second Street in Los Angeles, California in what is called Little Tokyo.
When Phil and Rosalie are talking on the roof of their building, there is a billboard for Frankel. Max Frankel is the Art Director for for the film.
The sign says Frankel and Black. Ralph E. Black was the Production Manager.
The billboard where McFarland is beaten by Regal's hoods advertised highway safety and contained a cross inside a circle. That is the "Green Cross for Safety" logo of the National Safety Council, a non-profit group that advocates for highway, workplace, and community safety in the United States. Ironically, the roadside billboard reads "Drive Carefully--The life you save may be your own."
Nicky's $95.00 per week salary on this 1955 film translates to about $1,050 per week in 2022 dollars.
Phil drives a 1954 Lincoln Capri four-door sedan to Brooklyn to see his folks.