This image of a motorcycle track near Rochefort, France was sent to me by a couple biking through the area and can also be found on their blog (http://www.molesoup.com/cyclewestfrance.html). I was aware that the Germans used motorcycles during the war but had never before heard of a motorcycle track used in this manner. Apparently, these narrow concrete tracks were built by the Germans to patrol large areas of concurred territory. They are now used for cycle paths.
My interest in posting this image is to provide some historical context and also show that a motorcycle track can be a highly efficient option to move a single person - not unlike the 80% of American Single Occupancy Vehicle (SOV) commuters.