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

A-18
Light Trucks
Buses
Vmt - DOT, FHWA, Highway Statistics Summary to 1995, Table VM-20 1 A, and Table VM- 1
of the 1996-98 editions. Light trucks were defined as 2-axle, 4-tire trucks.
Energy Use - Defined as 2-axle, 4-tire trucks. Total gallons of fuel was taken from DOT,
FHWA, Highway Statistics Summary to 1995, Table VM-20 1 A, and Table VM- 1 of the
1996-98 annual editions. Based on data from the 1982 TIUS Public Use Tape, fuel use
for 1970-87 was distributed among fuel types as follows: 95.3% gasoline; 3.5% diesel;
and 1.2% lpg. .Fuel use for 1988-93 was distributed based on the 1987 TIUS: 96.6%
gasoline; 3.3% diesel; and 0.1% lpg. Fuel use for 1994-96 was distributed based on the
1992 TIUS: 96.4% gasoline; 3.3% diesel; 0.3% Ipg. Fuel use for 1997-98 was based on
the 1997 VIUS: 96.3% gasoline, 3.4% diesel, 0.2% lpg. Natural gas data are fl-om the
DOE, EIA Natural Gas Annual 1998, Table 1; transit bus natural gas was subtracted from
the total and the remainder was assumed to be light vehicle use. Light trucks were
assumed to use 75% of light vehicle natural gas use.
Transit:
Vmt, Pmt, Energy Use - APTA, 2000 Transit Fact Book, Washington, DC, 2000, and annual.
Non-diesel fossil fuel consumption was assumed to be used by motor buses. For the
years 1988-94, motor bus gasoline use was estimated as 5% of “other” fuels, based
on personal communication with the APTA Research and Statistics Department.
In &city:
Pmt - 1970-84 - American Bus Association, Annual Report, Washington, DC,
annual.
1985-98 - Eno Transportation Foundation, Transportation in America 1999,
Seventeenth Edition, Lansdowne, VA, 2000, p. 47.
Vmt - 1990-98 - Estimated using passenger travel and an average load factor of 23.2.
Energy Use - 1970-84 - American Bus Association, Annual Report, Washington,
DC, annual.
1985-98 - Eno Transportation Foundation, Transportation in America 1999,
Seventeenth Edition, Lansdowne, VA, p. 56, and annual. For conversion purposes,
fuel for all intercity buses was assumed to be diesel fuel.
School:
Vmt - 1970-84 - DOT, FHWA, Highway Statistics 1984, Washington, DC, Table
VM-1, p. 175, and annual.
1985-87 - DOT, TSC, National Transportation Statistics, 1989, Figure 2, p. 7, and
annual.
1988-98- National Safety Council, Accident Facts, 1999 Edition, Chicago, IL, and
annual.
Energy Use - 1970-84 - DOT, FHWA, Highway Statistics 1984, Washington,
DC, Table VM- 1, and annual.
1985-86 - DOT, TSC, National TransportationStatistics,Figure 2, p. 5, and annual.
1987-98 - Eno Transportation Foundation, Transportation in America 1999,
Seventeenth Edition, Lansdowne, VA, p. 56, and annual. 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