US building costs are high, but I don't think this is a fair comparison. Ontario, California is part of the Los Angeles metro area. Building a new railway insid

US building costs are high, but I don't think this is a fair comparison. Ontario, California is part of the Los Angeles metro area. Building a new railway inside any already-developed metro area is obviously going to cost much more than building a railway in the open countryside. The cost also likely includes the stations at either end.