Table B-7a. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Hazard Class Division and Mode of Transportation: 2002
Monday, July 2, 2012
Table B-7a. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Hazard Class Division and Mode of Transportation: 2002
[Estimates are shown as percents and are based on data from the 2002 Commodity Flow Survey]
Division 1.1, Explosives with a mass explosion hazard
| Hazard Class Division and Mode of Transportation | Value | Tons | Ton-miles | CV of Average miles per shipment |
|||
|---|---|---|---|---|---|---|---|
| CV | Std. error of percent | CV | Std. error of percent | CV | Std. error of percent | ||
| All modes | 33.9 | – | S | S | S | S | S |
| Single modes | 33.5 | 1.0 | S | S | S | S | S |
| Truck | 33.5 | 1.0 | S | S | S | S | S |
| For-hire truck | 44.3 | 13.4 | S | S | S | S | 27.1 |
| Private truck | S | S | S | S | S | S | 39.1 |
| Rail | – | – | – | – | – | – | – |
| Water | – | – | – | – | – | – | – |
| Air (includes truck and air) | – | – | – | – | – | – | – |
| Pipeline | – | – | – | – | S | S | S |
| Multiple modes | S | S | S | S | S | S | 31.6 |
| Parcel, U.S.P.S. or courier | S | S | S | S | S | S | 31.6 |
| Other multiple modes | – | – | – | – | – | – | – |
| Other and unknown modes | S | S | S | S | S | S | 31.6 |
Division 1.2, Explosives with a projection hazard
| Hazard Class Division and Mode of Transportation | Value | Tons | Ton-miles | CV of Average miles per shipment |
|||
|---|---|---|---|---|---|---|---|
| CV | Std. error of percent | CV | Std. error of percent | CV | Std. error of percent | ||
| All modes | S | S | S | S | S | S | 31.6 |
| Single modes | S | S | S | S | S | S | 31.6 |
| Truck | S | S | S | S | S | S | 31.6 |
| For-hire truck | S | S | S | S | S | S | 31.6 |
| Private truck | – | – | – | – | – | – | – |
| Rail | – | – | – | – | – | – | – |
| Water | – | – | – | – | – | – | – |
| Air (includes truck and air) | – | – | – | – | – | – | – |
| Pipeline | – | – | – | – | S | S | S |
| Multiple modes | – | – | – | – | – | – | – |
| Parcel, U.S.P.S. or courier | – | – | – | – | – | – | – |
| Other multiple modes | – | – | – | – | – | – | – |
| Other and unknown modes | – | – | – | – | – | – | – |
Division 1.3, Explosives with predominantly a fire hazard
| Hazard Class Division and Mode of Transportation | Value | Tons | Ton-miles | CV of Average miles per shipment |
|||
|---|---|---|---|---|---|---|---|
| CV | Std. error of percent | CV | Std. error of percent | CV | Std. error of percent | ||
| All modes | S | S | 46.8 | – | 43.3 | – | 23.3 |
| Single modes | S | S | 46.8 | – | 43.3 | – | 23.3 |
| Truck | S | S | S | S | 47.9 | 5.2 | 23.5 |
| For-hire truck | S | S | S | S | S | S | 26.3 |
| Private truck | S | S | S | S | S | S | 40.0 |
| Rail | S | S | S | S | S | S | 31.6 |
| Water | – | – | – | – | – | – | – |
| Air (includes truck and air) | S | S | S | S | S | S | 31.6 |
| Pipeline | – | – | – | – | S | S | S |
| Multiple modes | – | – | – | – | – | – | – |
| Parcel, U.S.P.S. or courier | – | – | – | – | – | – | – |
| Other multiple modes | – | – | – | – | – | – | – |
| Other and unknown modes | – | – | – | – | – | – | – |
Division 1.4, Explosives with no significant blast hazard
| Hazard Class Division and Mode of Transportation | Value | Tons | Ton-miles | CV of Average miles per shipment |
|||
|---|---|---|---|---|---|---|---|
| CV | Std. error of percent | CV | Std. error of percent | CV | Std. error of percent | ||
| All modes | 27.0 | – | 34.4 | – | 26.7 | – | 8.4 |
| Single modes | 28.1 | 3.5 | 35.0 | 1.8 | 27.4 | 1.9 | 12.1 |
| Truck | 27.8 | 3.3 | 35.1 | 1.9 | 27.5 | 2.3 | 11.8 |
| For-hire truck | 25.2 | 3.9 | 36.6 | 2.7 | 27.9 | 2.7 | 8.4 |
| Private truck | S | S | 41.7 | 1.9 | S | S | 32.9 |
| Rail | S | S | S | S | S | S | 31.6 |
| Water | – | – | – | – | – | – | – |
| Air (includes truck and air) | S | S | 49.7 | 0.3 | S | S | 16.3 |
| Pipeline | – | – | – | – | S | S | S |
| Multiple modes | 38.3 | 3.5 | S | S | S | S | 10.8 |
| Parcel, U.S.P.S. or courier | 38.3 | 3.5 | S | S | S | S | 10.8 |
| Other multiple modes | – | – | – | – | – | – | – |
| Other and unknown modes | S | S | S | S | S | S | S |
Division 1.5, Very insensitive explosives, blasting agent
| Hazard Class Division and Mode of Transportation | Value | Tons | Ton-miles | CV of Average miles per shipment |
|||
|---|---|---|---|---|---|---|---|
| CV | Std. error of percent | CV | Std. error of percent | CV | Std. error of percent | ||
| All modes | 35.9 | – | 47.9 | – | 38.1 | – | S |
| Single modes | 35.9 | 0.2 | 47.9 | – | 38.1 | – | S |
| Truck | 36.5 | 3.6 | 49.3 | 3.9 | 38.1 | 7.0 | 32.6 |
| For-hire truck | 48.5 | 5.5 | 45.7 | 9.2 | 46.2 | 9.3 | 15.4 |
| Private truck | 39.2 | 7.8 | S | S | 45.7 | 9.2 | 49.0 |
| Rail | 44.9 | 2.7 | 41.6 | 3.9 | 44.6 | 7.7 | 24.2 |
| Water | – | – | – | – | – | – | – |
| Air (includes truck and air) | S | S | S | S | S | S | 28.0 |
| Pipeline | – | – | – | – | S | S | S |
| Multiple modes | S | S | S | S | S | S | 28.2 |
| Parcel, U.S.P.S. or courier | S | S | S | S | S | S | 28.2 |
| Other multiple modes | – | – | – | – | – | – | – |
| Other and unknown modes | S | S | S | S | S | S | 34.9 |
Division 2.1, Flammable gases
| Hazard Class Division and Mode of Transportation | Value | Tons | Ton-miles | CV of Average miles per shipment |
|||
|---|---|---|---|---|---|---|---|
| CV | Std. error of percent | CV | Std. error of percent | CV | Std. error of percent | ||
| All modes | 10.6 | – | 10.5 | – | 14.1 | – | 33.4 |
| Single modes | 10.7 | 0.4 | 10.5 | 0.2 | 13.9 | 0.5 | 33.8 |
| Truck | 11.5 | 5.3 | 19.7 | 6.3 | 35.4 | 4.5 | 36.9 |
| For-hire truck | 24.9 | 3.1 | 29.7 | 3.4 | 49.5 | 4.6 | 20.3 |
| Private truck | 14.5 | 5.1 | 28.1 | 6.1 | 39.1 | 2.1 | 22.4 |
| Rail | 20.5 | 2.8 | 19.1 | 3.0 | 15.9 | 4.3 | 7.5 |
| Water | 43.1 | 1.1 | 37.8 | 2.3 | 32.7 | 2.2 | 32.4 |
| Air (includes truck and air) | S | S | S | S | S | S | 27.6 |
| Pipeline | 23.4 | 4.5 | 21.6 | 5.1 | S | S | S |
| Multiple modes | 33.8 | 0.2 | 44.4 | 0.2 | 49.3 | 0.5 | 17.5 |
| Parcel, U.S.P.S. or courier | S | S | S | S | S | S | 25.1 |
| Other multiple modes | 38.7 | – | 44.7 | 0.2 | 49.8 | 0.5 | S |
| Other and unknown modes | S | S | 32.7 | – | 38.7 | – | S |
Division 2.2, Nonflammable, nontoxic compressed gases
| Hazard Class Division and Mode of Transportation | Value | Tons | Ton-miles | CV of Average miles per shipment |
|||
|---|---|---|---|---|---|---|---|
| CV | Std. error of percent | CV | Std. error of percent | CV | Std. error of percent | ||
| All modes | 11.8 | – | 36.7 | – | 29.6 | – | 38.9 |
| Single modes | 12.1 | 1.2 | 36.8 | 0.3 | 30.1 | 2.2 | 34.9 |
| Truck | 12.7 | 2.0 | 27.2 | 9.9 | 29.1 | 7.9 | 35.3 |
| For-hire truck | 24.3 | 8.2 | 43.9 | 6.8 | 31.3 | 9.8 | 13.2 |
| Private truck | 23.0 | 7.8 | 31.7 | 9.4 | 42.7 | 9.7 | 37.7 |
| Rail | 41.8 | 0.3 | 45.3 | 0.6 | S | S | 19.2 |
| Water | S | S | S | S | S | S | 31.7 |
| Air (includes truck and air) | 41.5 | 0.2 | S | S | S | S | 19.2 |
| Pipeline | S | S | S | S | S | S | S |
| Multiple modes | 29.4 | 1.2 | 40.2 | 0.1 | S | S | 32.1 |
| Parcel, U.S.P.S. or courier | 35.7 | 1.2 | S | S | 28.3 | – | 35.1 |
| Other multiple modes | 43.7 | 0.1 | S | S | S | S | 27.5 |
| Other and unknown modes | 37.0 | 0.2 | 29.5 | 0.1 | S | S | S |
Division 2.3, Gases toxic by inhalation
| Hazard Class Division and Mode of Transportation | Value | Tons | Ton-miles | CV of Average miles per shipment |
|||
|---|---|---|---|---|---|---|---|
| CV | Std. error of percent | CV | Std. error of percent | CV | Std. error of percent | ||
| All modes | 11.8 | – | 13.9 | – | 11.3 | – | 27.3 |
| Single modes | 11.8 | 0.4 | 13.9 | 0.7 | 11.2 | 0.2 | 27.4 |
| Truck | 18.0 | 7.4 | 22.6 | 6.2 | 26.3 | 6.1 | 32.1 |
| For-hire truck | 29.8 | 7.3 | 35.3 | 5.7 | 35.7 | 5.8 | 30.3 |
| Private truck | 23.2 | 7.0 | 26.4 | 4.5 | S | S | 31.0 |
| Rail | 17.9 | 4.9 | 11.5 | 5.9 | 12.7 | 7.9 | 9.7 |
| Water | S | S | S | S | S | S | 31.8 |
| Air (includes truck and air) | S | S | S | S | S | S | 25.8 |
| Pipeline | 43.5 | 5.5 | 40.4 | 6.1 | S | S | S |
| Multiple modes | S | S | S | S | S | S | 41.9 |
| Parcel, U.S.P.S. or courier | S | S | S | S | 41.1 | – | 41.7 |
| Other multiple modes | S | S | S | S | S | S | 31.6 |
| Other and unknown modes | 44.1 | 0.5 | S | S | 46.5 | 0.2 | S |
Division 4.1, Flammable solids
| Hazard Class Division and Mode of Transportation | Value | Tons | Ton-miles | CV of Average miles per shipment |
|||
|---|---|---|---|---|---|---|---|
| CV | Std. error of percent | CV | Std. error of percent | CV | Std. error of percent | ||
| All modes | 30.0 | – | 9.7 | – | 16.8 | – | 43.3 |
| Single modes | 32.6 | 6.2 | 9.7 | 0.2 | 16.9 | 0.5 | S |
| Truck | 38.9 | 9.4 | 7.1 | 6.4 | 24.7 | 5.9 | S |
| For-hire truck | 21.6 | 6.3 | 12.3 | 6.7 | 32.9 | 4.2 | 28.1 |
| Private truck | 46.1 | 10.6 | 21.7 | 4.4 | 18.7 | 2.8 | S |
| Rail | S | S | 26.5 | 5.0 | 20.4 | 7.5 | 14.8 |
| Water | 44.1 | 0.7 | 49.9 | 5.4 | S | S | 30.1 |
| Air (includes truck and air) | S | S | S | S | S | S | 25.4 |
| Pipeline | S | S | S | S | S | S | S |
| Multiple modes | S | S | S | S | S | S | 44.0 |
| Parcel, U.S.P.S. or courier | 39.7 | 2.2 | 46.8 | – | 48.5 | – | 20.7 |
| Other multiple modes | S | S | S | S | S | S | 31.1 |
| Other and unknown modes | S | S | S | S | S | S | S |
Division 4.2, Spontaneously combustible materials
| Hazard Class Division and Mode of Transportation | Value | Tons | Ton-miles | CV of Average miles per shipment |
|||
|---|---|---|---|---|---|---|---|
| CV | Std. error of percent | CV | Std. error of percent | CV | Std. error of percent | ||
| All modes | 36.3 | – | 35.4 | – | 39.4 | – | 19.4 |
| Single modes | 37.7 | 1.5 | 35.6 | 1.1 | 39.8 | 2.8 | 23.9 |
| Truck | 39.6 | 3.9 | 43.3 | 9.7 | S | S | 24.4 |
| For-hire truck | S | S | 45.6 | 10.8 | S | S | 19.0 |
| Private truck | 20.9 | 9.9 | 27.2 | 9.0 | S | S | 21.1 |
| Rail | 36.9 | 2.9 | S | S | 43.1 | 13.1 | 25.8 |
| Water | – | – | – | – | – | – | – |
| Air (includes truck and air) | S | S | S | S | S | S | 28.7 |
| Pipeline | – | – | – | – | S | S | S |
| Multiple modes | 46.0 | 1.5 | 33.3 | 1.1 | S | S | 23.8 |
| Parcel, U.S.P.S. or courier | 46.2 | 1.5 | 33.8 | 1.1 | S | S | 23.8 |
| Other multiple modes | S | S | S | S | S | S | 30.1 |
| Other and unknown modes | S | S | S | S | S | S | S |
Division 4.3, Dangerous when wet materials
| Hazard Class Division and Mode of Transportation | Value | Tons | Ton-miles | CV of Average miles per shipment |
|||
|---|---|---|---|---|---|---|---|
| CV | Std. error of percent | CV | Std. error of percent | CV | Std. error of percent | ||
| All modes | S | S | 42.8 | – | S | S | 17.6 |
| Single modes | S | S | 45.2 | 5.8 | S | S | 21.5 |
| Truck | S | S | 48.0 | 7.0 | S | S | 22.6 |
| For-hire truck | S | S | S | S | S | S | 21.5 |
| Private truck | 41.1 | 9.1 | 36.4 | 10.8 | S | S | 37.0 |
| Rail | S | S | S | S | S | S | 29.8 |
| Water | – | – | – | – | – | – | – |
| Air (includes truck and air) | S | S | S | S | S | S | 28.0 |
| Pipeline | – | – | – | – | S | S | S |
| Multiple modes | 46.0 | 3.3 | S | S | S | S | 29.9 |
| Parcel, U.S.P.S. or courier | S | S | S | S | S | S | 25.6 |
| Other multiple modes | S | S | S | S | S | S | 27.3 |
| Other and unknown modes | S | S | S | S | S | S | S |
Division 5.1, Oxidizers
| Hazard Class Division and Mode of Transportation | Value | Tons | Ton-miles | CV of Average miles per shipment |
|||
|---|---|---|---|---|---|---|---|
| CV | Std. error of percent | CV | Std. error of percent | CV | Std. error of percent | ||
| All modes | 21.2 | – | 29.1 | – | 29.4 | – | 21.0 |
| Single modes | 21.8 | 2.0 | 29.1 | 1.7 | 30.0 | 2.4 | 17.3 |
| Truck | 25.3 | 5.2 | 37.0 | 6.6 | 47.2 | 8.5 | 19.3 |
| For-hire truck | 24.6 | 7.5 | 44.2 | 8.4 | S | S | 15.6 |
| Private truck | 40.5 | 7.7 | 32.2 | 6.2 | 21.5 | 2.7 | 19.4 |
| Rail | 41.0 | 5.2 | 24.2 | 6.5 | 22.1 | 8.8 | 16.8 |
| Water | – | – | – | – | – | – | – |
| Air (includes truck and air) | S | S | 49.7 | – | S | S | 31.3 |
| Pipeline | – | – | – | – | S | S | S |
| Multiple modes | 41.5 | 1.8 | S | S | S | S | 18.0 |
| Parcel, U.S.P.S. or courier | S | S | S | S | S | S | 25.1 |
| Other multiple modes | 49.3 | 1.9 | S | S | S | S | S |
| Other and unknown modes | S | S | S | S | S | S | S |
Division 5.2, Organic peroxides
| Hazard Class Division and Mode of Transportation | Value | Tons | Ton-miles | CV of Average miles per shipment |
|||
|---|---|---|---|---|---|---|---|
| CV | Std. error of percent | CV | Std. error of percent | CV | Std. error of percent | ||
| All modes | 49.4 | – | S | S | S | S | 16.4 |
| Single modes | 49.7 | 1.2 | S | S | S | S | 17.6 |
| Truck | S | S | S | S | S | S | 17.7 |
| For-hire truck | S | S | S | S | S | S | 16.0 |
| Private truck | S | S | 44.1 | 14.5 | 49.5 | 11.8 | 31.7 |
| Rail | S | S | S | S | S | S | 30.1 |
| Water | – | – | – | – | – | – | – |
| Air (includes truck and air) | S | S | S | S | S | S | 31.6 |
| Pipeline | – | – | – | – | S | S | S |
| Multiple modes | S | S | S | S | S | S | 29.5 |
| Parcel, U.S.P.S. or courier | S | S | S | S | S | S | 29.5 |
| Other multiple modes | – | – | – | – | – | – | – |
| Other and unknown modes | S | S | S | S | S | S | 31.6 |
KEY:
– Represents an estimate equal to zero or less than 1 unit of measure.
S Estimate does not meet publication standards because of highly sampling
variability or poor response quality.
CV Coefficient of variation of number
NOTE: 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/cfs.
SOURCE: Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Hazmat Data, December 2004.