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Show Keeping Up i ( ; ) Science ServIceWNU Service -WNU WNU - WNU Service ServiceHigh High Higll Rail Speeds SpeedsFacing Facing Big Problelll Problemof of Safe Stopping StoppingBest Best of l\Iode1 l Iode1 \ Modem n B1 BiakesAre akes Are Not Sufficient SufficientNew New YorkTop York -Top Top - Top speeds on onraIlroads onrailroads raIlroads have been raised In Inthe inthe the last three years from 80 80and 80and and 90 miles an hour to 100 100and 100and and 120 miles an hour . Loco Loco- LocomotIves Locomotives - motives capable of keepingsustained keepmg keepmgsustained sustained speeds at the latter latterfigures latterfigures figures are not at hand but butpresent butpresent present few technical difficul dIfficul- dIfficultIes difficulties - ties . Major problem that thatmust thatmust must be solved if the publIc publicis is ever to attain attam this tills swi swift swiftness t- t tness - ness in actual travel is what whatto whatto to do about stopping stoppmg such suchspeedIng suchspeeding speedIng masses of metal . . On applying applymg the most modernI modernbrakes modernbrakes I brakes yet developed , a tram speed speed- speedmg speeding - ing mg 100 miles an hour would havemoved have haveI havemo I mo\ mo moed \ ed 1,300 1300 , feet at the end of ten tenI tenseconds tenseconds I seconds and would still be travelmg traveling72 travelmgI I 72 miles an hourl hourI It will WIU go another another1,300 another1300 11,300 11300 , feet before coming commg to a full fullI fullstop fullstop stop , or about a half mile m 111 aU aUI allWith I I WIth conventional brakes br3kes , as used usedwidely usedwidely widely , the picture is even worse It Itwould Itwould would take 22 seconds to cut the 100 100mIles 100miles mIles an hour speed to 72 miles an anhour anhour hour , and 4,800 4800 , feet in m all would be berequIred berequired requIred to achieve a complete stop stopSolutIon stopSolution SolutIon a Necessity . All AU of which makes discussions ofjunmng of oflunmng lunmng trains trdms at such speeds for or- or orimary or ordinary - dinary imary passenger and freight traffic traffic1 I . sizable waste of time at present presentunless , unless adequate measures are tal.en talen tal.ento takento . to govern the tram movements m mthe inthe the faster schedules . . Chief responsibility responslbihty for a gradual gradual1I1crease gradualincrease 1I1crease in average speed lies hes m mthe inthe the tram dispatcher's dispatchers ' office , where wheretIghter wheretighter tIghter running runnmg schedules must be bewatched bewatched watched closely and sw swifter ter move move- movements movements - ments ordered so that the crack crackI cracktrams I trams of the line lme will not run the theI theslO theslower I slO\\ slO slOer \ \ er ones into mto sidings sldmgs too fre frequently fre- fre freI frequently - I quently . A gradual gradu31 rise in 111 avenge speed speedon speedon on schedules is thelay the \ way \lay lay the raIl raIlroads railroads roads are starting to solve the prob problem . lem Already man many ) ' of the maJor maJorrailroads majorrailroads railroads have their roadbeds so Im- Im Improved im improved - proved that trams are more safe safe"hlle safewhile \"hlle "hlle hlle \ ' " traveling at 80 miles an hour hourthan hourthan than they were previously at 60 |