Table 15b. Hazardous Material Shipment Characteristics for Packing Group I: Percent of Total for 2007 and 2002
Table 15b. Hazardous Material Shipment Characteristics for Packing Group I: Percent of Total for 2007 and 2002
Estimates are based on data from the 2007 and 2002 Commodity Flow Surveys. Because of rounding, estimates may not be additive.
| Description | Value (percent) | Tons (percent) | Ton-miles (percent) 1 | Value Standard Error of % | Tons Standard Error of % | Ton-miles Standard Error of % | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2007 | 2002 | 2007 | 2002 | 2007 | 2002 | 2007 | 2002 | 2007 | 2002 | 2007 | 2002 | |
| Total | 100 | 100 | 100 | 100 | 100 | 100 | - | - | - | - | - | - |
| Packing Group I | 27 | 26.9 | 26.2 | 26.3 | 22.3 | 24.5 | 0.9 | 0.9 | 1.2 | 1 | 1.7 | 2.1 |
KEY: - = Zero or Less than half the unit shown; thus, it has been rounded to zero.
1 Ton-miles estimates are based on estimated distances traveled along a modeled transportation network.
NOTES: Packing Groups I, II, and III reflect the level of hazard associated with the material being shipped. Packing Group I is the most rigorous. Value-of-shipment estimates are reported in current prices. More information on sampling error, confidentiality protection, nonsampling error, sample design, and definitions may be found at http://www.bts.gov/publications/commodity_flow_survey/.
SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics and U.S. Department of Commerce, U.S. Census Bureau, 2007 Economic Census: Transportation Commodity Flow Survey, December 2009.