TRANSPORTATION ENERGY DATA BOOK: EDITION 20 - Center for ...

Motorcycles
Buses
Other Trucks: DOT, FHWA, Highway Statistics 1998, Table VM-1. Total gallons for
other trucks was the difference between total and 2-axle, 4-tire trucks. These gallons
were distributed as follows based on data from the 1997 VIUS Public Use CD:
12.4% of fuel assumed to be gasoline, 87.1% diesel, and 0.5% lpg.
Number of Vehicles and Vmt - DOT, FHWA, Highway Statistics 1998, Table VM-1.
Pmt - Calculated by ORNL as vmt multiplied by load factor.
Load Factor - DOT, FHWA, Office of Highway Information Management, 1995 NPTS, Public
Use Tape, 1997.
Energy Use - DOT, FHWA, Highway Statistics 1998, Table VM-1. For conversion purposes,
fuel for all motorcycles was assumed to be gasoline.
Transit:
Number of Vehicles, Vmt, Pmt, and Energy Use - Motor bus only. APTA, 2000 Transit
Fact Book, 2000, Washington, DC.
Load Factor - Calculated by ORNL as pmt/vmt.
In tercity:
Number of Vehicles - Estimatedby ORNL as 18% of commercial bus registrations, DOT,
FHWA, Highway Statistics 1998, Table MV- 10.
Pmt - Eno Transportation Foundation, Transportation in America, 1999, Seventeenth
Edition, Lansdowne, VA, 2000, p. 47.
Vmt - Estimated using passenger travel and an average load factor of 23.2
persons/vehicle.
Load Factor -Estimated as 23.2 based on historical data.
Energy Use - Eno Transportation Foundation, Transportation in America 1999,
Seventeenth Edition, 2000, Lansdowne, VA, p. 56. For conversion purposes, fuel
for all intercity buses was assumed to be diesel fuel.
School:
Number of Vehicles - School and other nonrevenue as reported in DOT,
FHWA, Highway Statistics 1998, Table MV-10.
Vmt, Pmt - National Safety Council, Accident Facts, 1999Edition Chicago, IL.
Load Factor - Calculated by ORNL as pmt/vmt.
Energy Use - Eno TransportationFoundation, Transportation in America 1999, Sixteenth
Edition, 2000, Lansdowne, VA, p. 56. For conversion purposes, fuel for school
buses was assumed to be 90% diesel fuel and 10% gasoline based on estimates from
the National Association of State Directors of Pupil Transportation Services.
TRANSPORTATION ENERGY DATA BOOK: EDITION 20-2000
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