. Report on the Pittsburgh transportation problem, submitted to Honorable William A. Magee, mayor of the city of Pittsburgh . COMPARISON OF LAR°,E URBAN RAIll On this plate is recorded the service rendered from year to year in enlines indicate directly the ratio between these quantities in cents per car mile; thusyear the earnings per car mile will be 25 cents, as indicated by the dotted radial pathrough all other intersections where the ratio between earnings and car miles is 2ia car mile basis. This diagram shows at once the income and operating expenses compared from year to year with
. Report on the Pittsburgh transportation problem, submitted to Honorable William A. Magee, mayor of the city of Pittsburgh . COMPARISON OF LAR°,E URBAN RAIll On this plate is recorded the service rendered from year to year in enlines indicate directly the ratio between these quantities in cents per car mile; thusyear the earnings per car mile will be 25 cents, as indicated by the dotted radial pathrough all other intersections where the ratio between earnings and car miles is 2ia car mile basis. This diagram shows at once the income and operating expenses compared from year to year with its previous record and with those of other systi This plot also records along the upper margin variations in operating ratio,basis of car BllLWAY SYSTEMS ON CAR MILE BASIS jjcar miles with the corresponding earnings and operating expenses. The radial-tbas if 10,000,000 car miles are run per year with earnings of $2,500, perJ fissing through the intersection of the arrows. This 25 cent line would also passB»5. Therefore these radials make it possible to compare large or small systems onMper car mile for each system for each year, so that the records of each system can■ .i-tems.„tio, both with and without taxes, and just below, the total track mileage, all on the COMPARATIVE TRACTION RESULTS 123 GRAPHICAL ANALYSIS OF OPERATING RESULTS ON CAR MILE BASIS The accompanying plate is most important in showing theresults in Pittsburgh for the past eight years compared withthose from other American cities for a period of years. Thisdiagram differs from the preceding ones. Revenue car miles areplotted along the horizontal axis, gross earnings along the ver-tical axis, thus showing the relation between two quantities ins
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectstreetr, bookyear1910
