They certainly do off the autobahn Sam.
Its from the verb Fahren = Drive, travel
Kraftwerk had a hit many years back with Autobahn which had the line Fahrt, fahrt, fahrt auf der autobahn in it as the main chorus.
I had a similar experience with my dad in Australia to you Gill.
He commented on how many places were called Fireplace as we drove along some roads as we kept coming across signs saying "Fireplace 200kms"