The song 'Convoy' is a great snapshot into American culture in general and the trucking sub-culture in particular. But what do all the terms mean and why was the song so popular? In this fascinating insight into the world of the 1970s, we look at what the song's lyrics mean and how they came about to create a world-wide hit that reached No 1 in the US, Canada, Australia, New Zealand and No 2 in the UK.