Aerial reconnaissance over western Germany in May 1942, showed the
use of a motor vehicle road train by the Germans. The train observed appeared
to be about 260 feet long and to consist of one very large tractor and seven
trailers. The trailers each seemed about 25 feet long. Speed of the train was
estimated at 8 to 10 miles an hour.
Comment: Road trains have been observed in Germany during recent
years. They usually consisted of a tractor (wheeled prime mover) and two
or three trailers; no more than four trailers per train were ever observed. It
should be noted that the practical use of a long train as described in the
paragraph above would be restricted to highways like the Reichsautobahn in
Germany, which are very wide, have easy grades, no cross traffic, few and
very gradual curves, and avoid all towns.