MODAL BREAKDOWN OF HAZARDOUS MATERIALS INCIDENTS

MODAL BREAKDOWN OF HAZARDOUS MATERIALS INCIDENTS

Hazardous Materials Incidents by Mode (monthly data, not seasonally adjusted)

Hazardous Materials Incidents by Mode (monthly data, not seasonally adjusted) - Highway and Air

All 2001 data are preliminary

Hazardous Materials Incidents by Mode (monthly data, not seasonally adjusted)

Hazardous Materials Incidents by Mode (monthly data, not seasonally adjusted) - Rail and Waterborne

All 2001 data are preliminary

Most reported releases of hazardous materials occur on the highways.

Hazardous Materials Incidents by mode    Apr-00       Apr-01*   
Highway 1,142   1,242
Highway percent change from same month previous year  3.63    8.76
Air   123      95
Air percent change from same month previous year  2.50  -22.76
Rail    80      60
Rail percent change from same month previous year  9.59  -25.00
Waterborne (not including bulk shipments)     3       0
Waterborne percent change from same month previous year 50.00 -100.00

* Preliminary estimates

NOTE: The current value is compared to the value from the same period in the previous year to account for seasonality.

Incident reporting requirements were extended to intrastate motor carriers on October 1, 1998, which may partly explain the subsequent increased volume of reports. Beginning in April 1993, there was sharp improvement in reporting of incidents by small package carriers.

A reported incident is a report of any unintentional release of hazardous material while in transportation (including loading, unloading, and temporary storage). It excludes pipeline and bulk shipments by water, which are reported separately.

SOURCE: U. S. Department of Transportation, Research and Special Program Administration, Office of Hazardous Materials, Planning and Analysis, Hazardous Materials Information System data obtained through personal communication.