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Why cant we have duel mode or locomotive pulled light rail cars?
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<p>[quote user="Brooklyn Trolley Dodger"] Your regional planning agency wants to extend the light rail system or subway line down a existing railroad track about 5 miles. But the cost of cat is very high....So why not have a locomtive meet the cars and shuttle them down the line? Or use lightrail cars that run on electricty in the city and biodiesal in the suburbs like a hybrid bus?[/quote]</p><p>There might be merit in this, but it would depend on the balance of many, many factorrs. In a very general sense, multipurpose machines usually must suffer a compromise in the performance of each purpose to pay for the ability to serve more than one purpose. A Swiss Army Knife is the classic example of this inherent compromise. It performs multiple functions, but does not perform them as well as they would each be performed by a dedicated tool.</p>
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