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The Metro North runs at 90 mph IIRC. I don't know the Metro North specification therefore I just gave the Amtrak requirements. On the other hand there is the statement of both that their specifications differ but not that much that it is becomming a show stopper. So they'll try to bring them together. The NGEC group concluded in their Dual Power (3rd rail) specification that 110 mph instead of 125 mph in diesel-electric mode and 80 mph in 3rd rail mode are sufficient. This decision was guided by the MNR's, LIRR's current speeds and expected track dynamics: <a href="http://www.highspeed-rail.org/Documents/Dual_Mode_DC_3rd_Rail-Appendix_A_4-110_MPH_-_for_TSCapproval.docx">http://www.highspeed-rail.org/Documents/Dual_Mode_DC_3rd_Rail-Appendix_A_4-110_MPH_-_for_TSCapproval.docx</a> Why Amtrak moved to 125 mph, who knows? Regards, Volker
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