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[quote user="riprap"]<p>Thanks for the detailed answer (as per usual), Mr. Hadid. Actually, speaking for the West Coast, I can't think of any major city where the RR has decided to build a "trench", except for LA, the one I mentioned. Are you more familiar with the cities than I am? Also, since you admitted that these trenches have high maintenance costs and very few advantages, it would seem strange if more than a few of them were built, wouldn't it? Wouldn't it be easier to elevate the entire ROW, and wouldn't that also decrease the maintenance costs? Wouldn't RR overpasses be easier and more cost-effective than a trench?</p> <p>Riprap</p>[/quote]<br><br>Visit the Official Territory, where railroads have coexisted with densely populated urban environments far longer than in the West. Chicago proper is almost 100% grade separated (the city, not the suburbs).<br><br>Bridges are also high capital cost, high maintenance items -- you can't win. Moreover, from a city's point of view, elevated railroads are eyesores, block access to businesses, subdivide neighborhoods, interfere with traffic patterns, create nooks and crannies for illegal trash dumping and vagrants, and generally devalue the neighborhood.<br><br>S. Hadid<br>
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