File:Electric railway review (1906) (14761078655).jpg

Identifier: electricrailwayr18amer (find matches)
Title: Electric railway review
Year: 1906 (1900s)
Authors: American Street and Interurban Railway Association
Subjects: Street-railroads Electric railroads
Publisher: Chicago : Wilson Co
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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Atlantic City Track Improvements—Cross Section Showing Details of Track Construction and Paving. vention city a very substantial iiaving. and the Atlantic CityElectric Railway a roadbed of permanent character, is shownby the results of an unexpected test in which a 10-wheel steamlocomotive, weighing 184,000 pounds, left the rails at theswitch which connects the street railway line with the tracksof the Pennsylvania Railroad and ran a distance over the pave-ment, leaving only the slight indentations in the pavement, as than they can on most smooth pavements. The gritty surface referred to is obtained by scientificallycombining broken stone of varying sizes mixed with bitumen,and from the very nature of its parts it is difficult to conceivehow it can be other than one of remarkable durability. Thegreatest care is exercised to secure tlje hardest stone available,in sizes from one inch down to impalpable powder, the finer
Text Appearing After Image:
Atlantic City Track Improvements—Showing Cracks Made in Paving by 10-Wheel Engine. shown in the engraving. After the engine had slid back onthe track the assistant engineer in charge of the work, A. B.Clark, measured the uepressions an found them to be onlyVi, and 1-16 of an inch in depth. resi)evMvely. The deeper de-pression is said to have been due to the sharp slant in thecrown of the street at this intersection. The track construction in many respects is similar tothat used by Arthur L. Plimpton, civil engineer of the BostonElevated Railway Company, in and around Boston. As indi-cated in the accompanying diagram, it will be noted that the jjarticles being used to fill the spaces between the largerstones. The proportions of the materials used are first carefullydetermined by physical tests with a view to obtaining thesmallest possible percentage of voids or air spaces In themineral aggregate, the character and shape of the stone vary-ing in each particular case. The proportions h

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