ANNUAL-MILES DRIVEN INCREASES WITH TRUCK SIZE. LESS THAN 12% OF LIGHT TRUCKS TRAVELLED MORE THAN HEAVY-HEAVY TRUCKS 20,000 MILES PER YEAR, WHILE OVER 50% OF TRUCKS HEAVIER THAN 26,000 LB DID. TRAVELLING GREATER THAN 20,000 MILES ANNUALLY ACCOUNTED FOR 88% OF ALL HEAVY-HEAVY TRUCK-MILES. Table 1.66 Percentage Breakdown of Truck Size Classes by Annual-Miles, 1972 aLight gross vehicle weight of 10,000 lb or less. Medium - gross vehicle weight of 10,001 to 20,000 lb. Light-heavy gross vehicle weight of 20,001 to 26,000 lb. Heavy-heavy Source: gross vehicle weight of 26,001 lb or more. U.S. Department of Commerce, Bureau of the Census, Census of Transportation: Inventory and Use Survey, TC72-T52, Washington, D.C., 1973, p. 7-8 and 7-18. 1972 Truck FLEET VEHICLES ARE OPERATED DIFFERENTLY THAN CARS FOR PERSONAL USE. b. U.S. Department of Transportation, Federal Highway Administration, Highway Statistics, Table VM-1 annual. These averages tend to underestimate average mileages. See Table 1.59 for comparison of estimates. Information supplied by American Automotive Leasing Association (AALA) which collects data annual in their AALA Fleet Cost Survey. Summary data appear in each April issue of Bobit's Automotive Fleet. Data estimated by Automotive Fleet Research Department. Source: D. B. Shonka, Characteristics of Automobile Fleet Operations in the U.S.: 1966-1977, ORNL/TM-6449, Oak Ridge National Laboratory, Oak Ridge, TN, 1978. Table 1.68 Average Annual-Miles per Vehicle by Federal Government Vehicles, 1970 through 1976 Source: General Services Administration, Federal Motor Vehicle Fleet Report, Washington, D.C., annual, Tables 46, 10, and 11. Table 1.69 Taxicab Passenger Operations Ratios, by Fleet Size, 1973 and 1975 Source: Control Data Corp., Well Research Company, U.S. Dept. of Transportation, Office of Transportation Systems Analysis and Information, Taxicab Operating Characteristics, Government Printing Office, Washington, D.C., March 1977, p. 3-3. 3.53 0.27 0.28 1.60 1.46 6.05 5.36 52.0 3.6 -8.8 -11.4 |