Figure 1,,,
Hazardous Materials Shipments by Mode of Transportation: 1997,,,
,,,
,Value,Tons,Ton-miles
Mode of Transportation,(Percent),(Percent),(Percent)
,,,
Truck,64,56,34
Rail,7,6,34
Water,6,9,31
Pipeline2,18,28,0
Other and unknown1,5.0,2.0,.02

"1 Includes air, parcel, postal, courier, other, and unknown.",,,
2 Excludes most shipments of crude oil.       ,,,
3 Pipeline data are not published because of high sampling variability or other reasons. ,,,
    ,,,
NOTE:  Percentages may not add to 100 due to rounding

"SOURCE: U.S. Department of Commerce, Census Bureau, 1997 Economic "
"Census—1997 Commodity Flow Survey, Hazardous Materials (Washington, "
"DC: December 1999), table 1."