From a Vauxhall Velox

Her mother read her mail And her Dad was a Policeman Which I must say worried me But some things have just got to be So we passed very fast like ships in the night Or cars in a contraflow system

Billy Bragg, From a Vauxhall Velox

Not only is this a perfect simile, it’s goddamned ballsy to drop a term like “contraflow system” into a pop song.