I think I said that Horse, Wheeled or Vehicle troops would need to be on the trains to make use of the zero movement. So it wouldn't be time specific, otherwise the railroads are the same movement as roads. After all trains are specialized vehicles for the rail and don't do so well on roads, likewise road vehicles don't make the best use of rail, they travel faster than thru wilderness but can't get anywhere as fast as a train could. Think of the wild west, they had cavalry and railroads back then, you could have the cavalry follow the tracks and take months to cross the country or load them on trains and get them there in days, same with infantry but you didn't need cars specifically for horses or flatbeds for cannons, sure they were around but not in great numbers, and if you cannibalised the production cars from the network then production would drop, and the cars have become more specific as the weapons have gotten more specific. I had heard about the Interstate system being something like that before, but in my area I think that if they tried to use them as airstrips then the people would riot and then sue the government. I think alot of people here would rather be Red (or whatever it is now) than stuck in traffic any longer, even if it was troops coming to the rescue. Got me thinking of another unit idea, Rail mounted guns. Cannon that can only move on tracks. Available with Steam Power and upgradeable with Motorized Transport to something a bit beefier than regular artillery say Bombard of 20. Cannons were used like this in the Civil War, and then expanded upon in Europe, especially the Germans with their ParisCannon that they could fire from 60 miles away.