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| Re: Elevated freight railroads (454880) | |||
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Re: Elevated freight railroads |
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Posted by aem7ac on Mon Jul 2 16:05:22 2007, in response to Elevated freight railroads, posted by R42 4787 on Mon Jul 2 15:42:47 2007. Define 'elevated'Federal grade xing reduction programs in the 60s and 70s put many freight railroads with passenger services on them, including some in Chicago and some in Boston, on semi-elevated alignments. Those tended to be elevated relative to the rest of the terrain, but the roadbed itself is put on an embankment as opposed to a structure (however, structures are liberally used where there are many grade xings within a short distance). Examples: Most of LIRR's Main Line most of the way to Hicksville Most of LIRR's Southern Tier Babylon Line most of the way to Babylon Most of B&M's New Hampshire Main Line as far north as at least Woburn B&M's Western Route Main Line most of the way through center of Haverhill, Mass. While Milwaukee Road's grade separation on the north side of Chicago pre-dates Federal funding of grade xing reductions, the entire 4-track alignment north out of Union Sta is built on elevated for that reason. I believe City of Chicago forced the issue. Today the alignment is not used for freight services but back in the day freight trains would have used the same main line that was elevated on concrete structures over the streets of Chicago. There is a flyover recently constructed mostly with public funds (not all of it federal) in Kansas City which carries the BNSF over the UP. I believe the BNSF is elevated whereas the UP is on the floor. Some of Southern's alignment out of Washington D.C. Union Station is elevated in the vicinity of the Potomac Riverfront. This is a classic 'el' as in a steel structure. A lot of former Pennsylvania RR alignments are elevated for short sections, esp. over junction points. Pennsy built many flying junctions to avoid freight/passenger conflicts. AEM7AC |
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