Allocating TRIs to non-transportation industries

Once the total economy share of TRIs available for OATS is determined for each mode, the TRIs are allocated to non-transportation industries that produce OATS. This allocation is based on a set of industry weights that approximate the relative size of transportation activities in non-transportation industries. The industry weights are based on employment counts of transportation workers in non-transportation industries, obtained from the Census of Population.

The NOC codes used to extract data from the census are provided in Table 1.

Once the employment counts are assigned to each industry by mode, the industry weights are calculated as a ratio of the employment of transportation workers in the industry to the total employment of transportation workers across all industries in each mode. Each industry thus has a set of four industry weights, one for each mode. The TRIs are allocated to each non-transportation industry according to the industry weights by mode.

Adjustments are then made to the OATS TRI estimates to ensure coherency with the SUTs. OATS activities showing up in an industry where they would be highly implausible are removed. If the level of TRI seems unreasonable, it is reduced and offset in another appropriate industry where possible. An effort is also made to ensure no negative values result from moving the TRIs from the non-transportation industries to the OATS industries.