The Autobahn (Germany's highspeed highway) played a significant role during the Cold War. It is not hard to guess that during a "Red invasion" the first target of attacs would have been the general military infrastructure, mainly the airports. For this occasion various parts on the Autobahn were built to function as alternative military landing/take-off zones (around 30 all around the country).You can still recognise them today because all the signs can be lowered into the ground as well as the crash barriers in the middle and on the sides. There are plugs for landing lights (whatever the term in english may be), a radar station is always nearby to function as tower and substitute roads lead around it in case traffic had to be redirected. Plus there are oversized parking lots attached to it being able to harbor even the largest planes.Furthermore many of the German bridges and tunnels on the Autobahn are built with pre-calculated holes in them for explosives to be installed. If necessary they could be detonated within seconds to destroy supply routes for any invading force.Military units nearby enjoyed a special training and were always prepared to execute the destruction. (I mean who wasnt "always prepared" during the Cold War).More on the topic: en.wikipedia.org/wiki/Highway_strip One last interesting info: The general military strategy assumed, that any German territory up to to the river Rhine would be lost right away due to the brute and unstoppable fighting power of the Red Army (back then). So the main strategy was built around the idea of defending the country from below this specific line (the Rhine that was). And yes, every military unit above that strategic line would be considered as "slow-down sacrifice".