Funny you should mention the long straight roads. Not too far away, there's a piece of Autobahn (the A44) that's very straight, concreted in the middle (with removable barriers), has trees trimmed back from it and has two very large parking areas at either end. Why is it like this? In case the Russians attacked. Planes would take off from the US. By the time they were ready to land in Germany, the barriers would have been removed from the median and the whole thing would have been set up as an emergency runway.