Interesting fact: The train was named for the song, not the other way around!!
"In the wake of the song's popularity, the Wabash Railroad named its express run between Detroit and St. Louis as the Wabash Cannon Ball in 1949, the only actual train to bear the name, which it carried until discontinued in 1971.[4] However, the train was named after the song, not the other way around."
From:http://en.wikipedia.org/wiki/Wabash_Cannonball
"In the wake of the song's popularity, the Wabash Railroad named its express run between Detroit and St. Louis as the Wabash Cannon Ball in 1949, the only actual train to bear the name, which it carried until discontinued in 1971.[4] However, the train was named after the song, not the other way around."
From:http://en.wikipedia.org/wiki/Wabash_Cannonball