AASHO ROAD TEST VEHICLE OPERATING COSTS RELATED TO GROSS WEIGHT.

IN THE VARIATIONS OF GASOLINE CONSUMPTION DUE TO INCREASES IN GROSS VEHICLE WEIGHT, THE AASHO TREND LINE WAS PARALLEL TO BUT SLIGHTLY LOWER THAN THE TREND LINE RECENTLY REPORTED FOR THE OPERATION OF COMMERCIAL VEHICLES. DIESEL FUEL COMSUMPTION ON THE ROAD TEST FOR 70,000-LB VEHICLES CLOSELY APPROXIMATED THE COMMERCIAL CONSUMPTION RATE PREVIOUSLY REPORTED FOR THIS GROSS WEIGHT. DIESEL FUEL CONSUMPTION RATES GROSS WEIGHTS HIGHER THAN THE PRESCRIBED MAXIMUM FOR THE INTERSTATE HIGHWAY SYSTEM WERE 0.245 GAL PER MI (4.1 MPG) AT 90,000 LB AND 0.290 GAL PER MI (3.4 MPG) AT 110,000-LB LOADED GROSS WEIGHTS. OIL ADDED TO ROAD TEST VEHICLES EXCLUSIVE OF REGULAR OIL CHANGES TENDED TO INCREASE AS THE GROSS WEIGHT OF VEHICLES INCREASED. TIRE COSTS OF 18,000-LB AXLES. TIRE COSTS FOR 30,000-LB SINGLE AND 48,000-LB TANDEM AXLES WERE FOUND TO BE MORE THAN TWICE THE TIRE COSTS FOR 18,000-LB AXLES. A SPECIAL STUDY OF TIRE AIR-PRESSURE BUILDUP INDICATED THAT AASHO VEHICLE TIRE PRESSURE INCREASED FRO 8 TO 11 PSI WITHIN 1-1/2 HOURS FROM FIRST START OF OPERATION. THIS BUILDUP DECREASED THE AREA OF THE TIRE CONTACTING THE PAVEMENT THEREBY INCREASING THE UNIT PRESSURES TO THE PAVEMENT. /AUTHOR/

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  • Supplemental Notes:
    • pp 149-165, 9 FIG, 7 TAB, 3 REF, 3 APP Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
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  • Authors:
    • Kent, Malcolm F
  • Discussers:
    • Normann, O K
    • Marick, Louis
  • Conference:
  • Publication Date: 1962

Media Info

  • Monograph Title: THE AASHO ROAD TEST - PROCEEDINGS OF A CONFERENCE HELD MAY 16-18, 1962, ST. LOUIS, MISSOURI
  • Serial:

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Filing Info

  • Accession Number: 00207113
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 26 1970 12:00AM