Where the Sidewalk Ends

No, not the Shel Silverstein book. The 1950 noir starring Dana Andrews. Includes excellent and amusing commentary. I can't quite figure out the significance of the title in the context of New York City. The riverfront plays a minor part in the plot and I guess you could say there is no sidewalk there, but it's not like anyone uses the sidewalk in a significant way in the movie. Sidewalks end where buildings begin ... I just don't know. Anyway, the movie is great.