in pattern recognition. but more importantly these days, trains are more efficient for moving goods than trucks, for a couple of reasons.
first, once a train is rolling, it takes much less energy than a truck, because of something called "rolling resistance" which is much lower for steel wheels on tracks than for rubber tires on asphalt. second, when train rights of way are built, they are expensive because they have a low grade, that is - not many hills. so while it takes more energy and time to build a railway bed compared to a highway, every train that runs on that track saves energy, while on the highway, every 