1011quiz2_n2k - e-mail _ 1.011 Project Evaluation Carl D....

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Quiz #2 (2003), 1.011 Project Evaluation e-mail ____________________________________ 1.011 Project Evaluation • Carl D. Martland & Lexcie Lu • MIT Center for Transportation Studies Friday, March 21, 2003 • (100 points, 25 of which are essay points) Quiz #2 – The Northeast Corridor In 1988, National Railroad Passenger Corporation (Amtrak) was contemplating a northward extension to Boston, Mass. of Pennsylvania Railroad’s experimental high-speed service “Metroliner” between Washington, D.C. and New York, N.Y. The existing railroad between New York and Boston (called the Shore Line) was constructed in segments between 1826 and the 1880s, but was absorbed into New York, New Haven & Hartford System by 1904. Amtrak took over the Shore Line as Conrail auctioned off excess railroad trackage in New England in 1976, and has since been maintaining the railroad for a maximum speed of 79mph. Although trains are permitted to run at a full 79mph throughout most of the Shore Line, station stops, curvature and drawbridge dynamic loading restrictions mean that the train achieves an average speed of 61mph. Amtrak has determined that higher speeds are needed to compete with the recently completed I-84 corridor, which runs via Hartford, Conn., and has enabled journey times by automobile between Boston and New York of as low as three hours. You have been asked by the Massachusetts Secretary of Transportation, to evaluate a number of options that engineers are contemplating for upgrading the Shore Line. Installation of cab signals which displays the aspect of the signal ahead right in the engineer’s cab will permit railroad engineers to run trains at 90mph over straight stretches of the track. Installation of automatic train stops, plus additional track work, will allow train operations at 110mph. Other enhancements will ultimately bring the top speed up to 150mph. Because of the need to slow down for stations and severe curves, increasing the top speed by 10mph does not necessarily result in a 10mph increase in average speed. These options have been costed and a summary sheet is given in Exhibit 1. Average Capital Op./Maint Top Speed Speed Travel Time Costs Cost Op. Rev Op. Profit mph mph hours $m $m/year $m/year $m/year 79 61 3.951 0 318.5 264.8 -53.7 90 76 3.171 330 335.0 498.7 163.7 110 82 2.939 930 365.0 568.3 203.3 125 85 2.835 1380 387.5
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This note was uploaded on 11/29/2011 for the course CIVIL 1.00 taught by Professor Georgekocur during the Spring '05 term at MIT.

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1011quiz2_n2k - e-mail _ 1.011 Project Evaluation Carl D....

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