USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Table 12. Derivation of the Values for the TSAs Direct Requirements Table

Thursday, August 15, 2024
Commodity Industry
In-house transportation
Industry1 Air Rail Truck Water HPTS Industryn
Commodity1 a11 a1AIR a1RAIL a1TRUCK a1WATER a1HPTS a1n
In-house transportation              
Air aAIR1 0 0 0 0 0 aAIRn
Rail aRAIL1 0 0 0 0 0 aRAILn
Truck aTRUCK1 0 0 0 0 0 aTRUCKn
Water aWATER1 0 0 0 0 0 aWATERn
HPTS 0 0 0 0 0 0 0
Commodityn an1 anAIR anRAIL anTRUCK anWATER anHPTS an1
Industry sum Column sum Column sum Column sum Column sum Column sum Column sum Column sum

Key: aij = TSA use valueij / ∑ j=1 TSA use valueij =  direct requirement coefficient for intermediate commodity i for industry j (excluding final uses)

SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics, 2014