Sentence:  Peckinpah is just as interested in the old golf-cart codger who says “Damn the <WSD>double-nickel</WSD>!” (in reference to the 55mph speed limit) as he is in Duck or Lyle, and much more so than in Ali MacGraw's character, along for the ride and marquee value. 
Meaning of the word marked with <WSD> tags:  The national speed limit of 55 miles per hour introduced in the USA in 1974.