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The State of Texas DOT Trans Texas Corridor website lists the costs of building NEW concrete freeways and asphalt freeways, the types of interchanges, types of bridges, and three different levels of railroads: freight, commuter, and High Speed.... among other things on a per mile basis.... The main varying factor is real estate acquisition.... DART has recently built electrified double tracked light rail on former railroad right of way, through tunnels, under power lines, and on rebuilt city streets including replacing all of the plumbing underneath, etc.etc.... DART has also made public the costs of each line through the different terrains..... There is no simple per mile basis, as every mile is different..... While one can state it costs $4 million per electrified mile of straight line ground level track..... that number is misleading. Bridges over streets, freeways, creeks and rivers costs as much or more than a mile of track.....
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