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

of them.
FOREWORD
This edition has many new tables and graphs. I would like to draw your attention to several
First, Table 1.1 and Figure 1.1 show an estimate of the total potential for fossil fuels. All the
values are expressed in trillion of barrels of oil equivalent (tboe). The table shows that the world has
consumed 0.8 1 tboe of conventional oil since oil was first discovered. The remaining conventional
oil is more than double this amount. The potential for other fossil fuels are enormous. Remaining
unconventional oil is about eight times that for conventional oil. The amount of conventional and
unconventional natural gas is about four time that for conventional oil. The potential for coal and
methane hydrates is even higher by a large amount. There is no shortage of fossil fuels, but the U.S.
may need fuels that are renewable, domestic and low in carbon.
Second, in Chapter 6, the scrappage functions have been up-dated.
Third, safety information is provided in Tables 7.23 through 7.25. It is seen that occupant
fatalities are down since 1975 and that single vehicle crashes are responsible for about 60 percent
as many deaths as multiple vehicle crashes.
Fourth, the heavy truck information in Chapter 8 has been enhanced with the addition of
1997 data from the Vehicle Inventory and Use Survey.
I hope you find this edition useful.
TRANSPORTATIONENERGYDA?‘ABOOIC EDITION~O-2000
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