Crodface
Chieftain
I beg to differ, I personally think highway/interstates would be much better than rail. Historically rail served its purpose during the 1800's - early 1900's, but around 1950 ish when the interstate system was built, many more people began to travel much easier and faster, hence highways were an upgrade to rail.
Rail also gives a production bonus. So while your troops and workers do move faster, it really represents the impact of rail on industry. A lot of shipping is still done by rail.
Also the U.S. drives and uses the interstate more than any other nation. Many countries, like most of Europe, still travel by train. But I could definitely see a modern rail upgrade, like maglev.