GASOLINE CONSUMPTION, WEIGHT, AND MILEAGE OF COMMERCIAL VEHICLES

FROM A STUDY CONDUCTED BY THE FORD MOTOR COMPANY IN 1950 THROUGH COOPERATION OF THE OWNERS OF 5,591 FORD TRUCKS OF 1948-, 1949-, AND 1950-YEAR MODELS, A SUMMARY OF MONTHLY MILEAGE, GROSS VEHICLE WEIGHT, AND GASOLINE CONSUMPTION IS PRESENTED FOR EIGHT MODELS OF SINGLE-UNIT TRUCKS AND THREE MODELS OF TRACTOR-SEMITRAILER COMBINATIONS. THESE SUMMARIES SHOW A WIDE VARIATION IN EACH OF THESE THREE CHARACTERISTICS OF USE. THE RANGE OF MILEAGE FOR THE MIDDLE 80 PERCENT OF THE LIGHTEST-CAPACITY TRUCK WAS FROM 600 TO 2,300 MILES A MONTH, WITH 100 PERCENT OF THESE MODELS BEING DRIVEN 100 AND 11,000 MILES A MONTH. THE RANGE IN MILEAGE FOR THE MIDDLE 80 PERCENT OF THE TRACTOR-SEMITRAILER COMBINATIONS WAS 1,300 TO 7,000 MILES A MONTH. THE MIDDLE 80 PERCENT OF THE LIGHTEST TRUCKS RANGED IN GROSS WEIGHT FROM 3,625 TO 4,700 LB. OTHER SINGLE-UNIT TRUCKS WITH FOUR TIRES RANGED FROM 4,625 TO 8,150 FOR THE MIDDLE 80 PERCENT. THE MIDDLE 80 PERCENT OF THE SINGLE-UNIT TRUCKS WITH DUAL REAR TIRES RANGED FROM 10,000 TO 22,600 LB. THE TRACTOR-SEMITRAILER COMBINATIONS RANGED FROM 28,500 TO 53,000 LB. IN WEIGHT FOR THE MIDDLE 80 PERCENT. THE MEDIAN WEIGHT WAS CLOSE TO 40,000 LB. THE GASOLINE CONSUMPTION OF THE LIGHTEST MODELS RANGED FROM 11.1 TO 17.2 MILES PER GALLON FOR THE MIDDLE 80 PERCENT WITH THE OTHER SINGLE-UNIT, FOUR-TIRED VEHICLES HAVING A RANGE OF 8.6 TO 15.0 MILES PER GALLON. SIMILARLY, THE SINGLE-UNIT, SIX-TIRED TRUCKS RANGED FROM 6.2 TO 10.8 MILES PER GALLON. THE TRACTOR SEMITRAILER COMBINATIONS HAD A RANGE OF 4.6 TO 8.7 MILES PER GALLON FOR THE MIDDLE 80 PERCENT. THESE WIDE RANGES IN MONTHLY MILEAGE, GROSS VEHICLE WEIGHT, AND GASOLINE CONSUMPTION INDICATE THAT THE PERFORMANCE OF ANY PARTICULAR VEHICLE OR FLEET OF VEHICLES SHOULD NOT BE USED AS REPRESENTING THE AVERAGE FOR ALL VEHICLES OF THAT CLASS UNTIL THOROUGH INVESTIGATION HAS SHOWN THE PARTICULAR DATA TO BE REPRESENTATIVE. THE CORRELATION OF MILEAGE AND GASOLINE CONSUMPTION WITH WEIGHT LACKS EXACTNESS BECAUSE OF NOT HAVING A SUFFICIENT NUMBER OF VEHICLES IN EACH 1,000-LB. GROSS-WEIGHT CLASS TO FIX THE LOCATION OF THE GASOLINE CONSUMPTION CURVE THROUGHOUT ITS RANGE. THE ANALYSES SHOW AN INCREASE IN RATE OF GASOLINE CONSUMPTION WITH INCREASING WEIGHT. THERE IS ALSO AN INCREASE IN MONTHLY MILEAGE WITH INCREASE IN WEIGHT. THE MILES PER GALLON OF GASOLINE CONSUMED IS SOMEWHAT HIGHER FOR WEIGHTS ABOVE 8,000 LB. THAN GIVEN IN PAST PUBLISHED REPORTS FOR ALL VEHICLES. INFORMATION AVAILABLE IS NOT SUFFICIENT TO DETERMINE WHICH REPORTS ARE THE MORE APPROPRIATE TO USE IN HIGHWAY FINANCIAL AND TAXATION ANALYSES. A DESIRABLE APPROACH TO THE DETERMINATION OF THE AVERAGE ANNUAL MILEAGE AND FUEL CONSUMPTION OF VEHICLES REGISTERED IN A GIVEN STATE WOULD BE TO STATISTICALLY SELECT THE SAMPLE OF VEHICLES, THEN HAVE ACCURATE RECORDS ON THESE VEHICLES KEPT FOR ONE YEAR. /AUTHOR/

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  • Accession Number: 00200969
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jul 7 1994 12:00AM