« While NATO coordinates military action, it doesn't finance bridges, railways and roads. That's where the EU is supposed to step up with the CEF [Connecting Europe Facility]. [...] The CEF military mobility money is aimed at connecting airports to railways, strengthening bridges and clearing space at ports for rapid landing. Other larger projects — such as Rail Baltica, a €5.8 billion European standard-gauge train connection running through Estonia, Latvia and Lithuania to Poland — are also cited as critical for defense. »
It isn't just Europe that hasn't invested enough in strategic infrastructure. Considering that one of the reasons behind the US's highways systems (US highways and Interstate highways) was to enable rapid movement for military purposes, there are a lot of sections that are pretty much unmaintained ... and overly congested with civilian traffic.
And consolidation among railroads means that there probably isn't excess capacity available for a large and sustained shipment of troops and supplies.
>There are 167.5 million daily crossings on 43,578 structurally deficient U.S. bridges in poor condition. >1 out of 3 U.S. bridges need to be replaced or repaired, including 30 percent of bridges on the Interstate. >At the current rate, it would take 30 years to fix all the nation's structurally deficient bridges.