Table B-13c. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Private Truck for Intrastate Versus Interstate for Selected UN Number (1) for the United States: 2012
(Estimates are based on data from the 2012 Commodity Flow Survey)
| UN number | UN description | Value | Tons | Ton-miles (2) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Coefficient of variation of number |
Intrastate — standard error of percent of total |
Interstate — standard error of percent of total |
Coefficient of variation of number |
Intrastate — standard error of percent of total |
Interstate — standard error of percent of total |
Coefficient of variation of number |
Intrastate — standard error of percent of total |
Interstate — standard error of percent of total |
||
| Total | 7.6 | 1.0 | 1.0 | 7.5 | 1.0 | 1.0 | 11.2 | 2.7 | 2.7 | |
| 1005 | Ammonia, anhydrous | 27.5 | 6.7 | 6.7 | 26.2 | 7.0 | 7.0 | 22.6 | 7.9 | 7.9 |
| 1006 | Argon, compressed | 15.6 | 5.1 | 5.1 | 20.3 | 5.9 | 5.9 | 22.8 | 6.6 | 6.6 |
| 1013 | Carbon dioxide | 11.2 | 5.2 | 5.2 | 22.4 | 4.8 | 4.8 | 25.8 | 7.3 | 7.3 |
| 1046 | Helium, compressed | 14.9 | 7.3 | 7.3 | S | S | 7.9 | 27.2 | 9.5 | 9.5 |
| 1066 | Nitrogen, compressed | 15.0 | 3.5 | 3.5 | 14.4 | 4.7 | 4.7 | 12.6 | 4.7 | 4.7 |
| 1072 | Oxygen, compressed | 25.8 | 4.1 | 4.1 | 17.9 | 3.7 | 3.7 | 27.7 | 4.5 | 4.5 |
| 1075 | Petroleum gases, liquefied or liquefied petroleum gas | 6.1 | 2.8 | 2.8 | 9.1 | 2.2 | 2.2 | 29.6 | 5.3 | 5.3 |
| 1170 | Ethanol or ethyl alcohol or ethanol solutions or ethyl alcohol solutions | 25.0 | 2.4 | 2.4 | 26.8 | 2.8 | 2.8 | 27.8 | 4.4 | 4.4 |
| 1202 | Diesel fuel, including gas oil or heating oil, light | 12.9 | 1.2 | 1.2 | 13.7 | 1.2 | 1.2 | 9.8 | 6.6 | 6.6 |
| 1203 | Gasoline, includes gasoline mixed with ethyl alcohol | 12.5 | 1.4 | 1.4 | 12.2 | 1.4 | 1.4 | 11.3 | 3.0 | 3.0 |
| 1223 | Kerosene | S | S | S | S | S | S | 41.2 | 6.1 | S |
| 1791 | Hypochlorite solutions | 34.1 | 6.6 | S | S | S | S | S | S | S |
| 1824 | Sodium hydroxide solution | 18.3 | 6.3 | 6.3 | 31.1 | 6.8 | 6.8 | 24.8 | 6.0 | 6.0 |
| 1830 | Sulfuric acid with more than 51 percent acid | 38.5 | 7.1 | 7.1 | 13.4 | 7.5 | 7.5 | 16.4 | 8.5 | 8.5 |
| 1978 | Propane, see also petroleum gases, liquefied | 35.6 | 1.0 | 1.0 | 38.4 | 1.0 | 1.0 | S | S | 4.0 |
| 1987 | Alcohols, n.o.s | 14.8 | 6.6 | 6.6 | 17.7 | 7.3 | 7.3 | 19.1 | 9.6 | 9.6 |
| 1993 | Flammable liquids, n.o.s | 11.3 | 0.7 | 0.7 | 12.0 | 0.7 | 0.7 | 23.9 | 1.9 | 1.9 |
| 1999 | Tars, liquid including road oils and cutback bitumens, including road asphalt | 25.0 | 5.9 | 6.5 | 29.0 | 3.7 | 4.7 | 28.8 | 7.7 | S |
| 2672 | Ammonia solutions | 28.2 | 9.8 | 9.8 | 32.4 | 9.8 | 9.8 | 36.0 | 10.4 | S |
| 3257 | Elevated temperature liquid, n.o.s., at or above 100 c and below its flash point | 13.7 | 6.2 | 6.2 | 15.0 | 6.5 | 6.5 | 12.6 | 8.0 | 8.0 |
KEY: S = Withheld because estimate did not meet publication standards.
(1) UN numbers shown had the highest estimated weight without considering sampling variability. Since an “All other UN numbers” line is not shown, estimates do not add to total.
(2) Ton-miles estimates are based on estimated distances traveled along a modeled transportation network. See “Mileage Calculations” section for additional information.
NOTES: The Introduction and appendixes give information on confidentiality protection, sampling error, nonsampling error, sample design and definitions. Links to this information on the Internet may be found at <www.census.gov/econ/cfs>.
For purposes of this table, individual shipment data are classified as either completely “interstate” or completely “intrastate.” All shipments with the state of destination different from the state of origin are classified as “interstate.” All shipments having the state of origin the same as the state of destination are classified as “intrastate.”
SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics and U.S. Department of Commerce, U.S. Census Bureau, 2012 Economic Census: Transportation Commodity Flow Survey, December 2014.