Transportation energy data book: edition 23 - Oak Ridge National ...

When comparing data between countries, one must realize that different countries have different testing
cycles to determine fuel economy and emissions. This table compares various statistics on the European,
Japanese, and U.S. testing cycles [for fuel economy measurements, the U.S. uses the formula, 1/fuel
economy = (0.55/city fuel economy) + (0.45/highway fuel economy)]. Most vehicles will achieve higher
fuel economy on the U.S. test cycle than on the European or Japanese cycles.
Table 4.27
Comparison of U.S., European, and Japanese Driving Cycles
Time
(seconds)
Percent of
time
stopped
or
decelerating
Distance
(miles)
Average
speed
(mph)
a The actual Federal Procedure (FTP), which is also the test for emissions certification, repeats the first 505
seconds of the Federal Urban Driving Simulation cycle, hot started, after a 10 minute hot soak. Starting with Model
Year 2001, the emissions test-but not the fuel economy test-incorporates a supplemental cycle that simulates
aggressive urban driving, coupled with an added air conditioning load.
TRANSPORTATION ENERGY DATA BOOK: EDITION 23—2003
Maximum
speed
(mph)
Maximum
acceleration
(mph/s)
Japanese 10/15 mode
test cycle
631 52.3 2.6 14.8 43.5 1.78
New European Driving
Cycle (NEDC)
1,181 24.9 6.84 20.9 74.6 2.4
U.S. EPA city cycle
(LA4) a
1,372 43.2 7.5 19.5 56.7 3.3
U.S. EPA highway cycle 765 9.3 17.8 48.2 59.9 3.3
U.S. Corporate Average
Fuel Economy cycle
2,137 27.9 10.3 29.9 59.9 3.3
Source:
Santini, D., A. Vyas, J. Anderson, and F. An, Estimating Trade-Offs along the Path to the PNGV 3X Goal, presented
at the Transportation Research Board 80 th Annual Meeting, Washington, DC, January 2001.
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