"Table 4: Significant Variables in the Inherent Risk Models 
for Gas Transmission and Hazardous Liquid Pipelines
(negative sign indicates a negative correlation with risk)",,,,,,,
Gas transmission model,Hazardous liquid model,,,,,,
+  Total Miles ,+  Total Miles ,,,,,,
+  Miles offshore ,+  Miles from 26 to <28” diameter,,,,,,
+  Miles from 4 to <10” diameter ,+  Miles pre-1920 ,,,,,,
+  Miles from 20 to <28” diameter ,+  Offshore >20% SMYS ,,,,,,
 -  Miles from 0 to <4” diameter ,+  Onshore <20% SMYS ,,,,,,
 -  Miles installed 2000-2009,+  Regulated gathering lines,,,,,,
,+  Total barrel-miles ,,,,,,
,+  HVL barrel-miles,,,,,,
,-   Miles from 8 to <10” diameter ,,,,,,
,-   Miles from 22 to <24” diameter ,,,,,,
,-   Miles from 24 to <26” diameter ,,,,,,
,-   Miles from 30 to <32” diameter ,,,,,,
,-   Miles >36” diameter ,,,,,,
,-   Anhydrous ammonia barrel-miles ,,,,,,
"SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, http://www.bts.gov.",