Lyric discussion by dan105 

Cover art for Downbound Train lyrics by Bruce Springsteen

yeah the long whistle bit is amazing song writing, fits the tune perfectly, Springsteen is one of the best writers when it comes to expressing emotion! I always thought the whistle was something to do with being called back to work: i saw it as another song written about the contrast of work / love, and certainly one of the best. He loses his love and is left with just his depressing job. The line about the long whistle sums it up perfectly; you can tell he's writing about personal experience.