ATTRIBUTION AND APPORTIONMENT

 

Apportionment

Apportionment is the distribution of funds using a statutory formula. Funds are available for obligation by the State at the time of apportionment, usually the first day of the Federal fiscal year (October 1) for which they are authorized. The following table shows the apportionment formulas, under TEA-21, for the four programs whose funds are distributed, at last partially, on the basis of fuel use or contribution to the Highway Account of the HTF. Because the apportionment of funds in these programs is based heavily on the data provided to FHWA by the States, complete and accurate data are extremely important.

 
Apportionment Formulas for Programs Distributed Using Motor Fuel Data
Program
Factors
Weight
Statute *
STP
Total lane miles of Federal-aid highways
25%
104(b)(3)
 
Total VMT on Federal-aid highways
40%
 
 
Estimated tax payments attributable to highway users paid into the Highway Account of the HTF
35%
 
 
IM
Interstate system lane miles
33-1/3%
104(b)(4)
 
VMT on interstate system
33-1/3%
 
 
Annual contributions to the Highway Account of the HTF attributable to commercial vehicles
33-1/3%
 
 
NHS
Lane miles on principal arterial routes (excluding interstates)
25%
104(b)(1)
 
VMT on principal arterial routes (excluding interstates)
35%
 
 
Diesel fuel used on highways
30%
 
 
Total lane miles on principal arterial highways divided by the State's total population
10%
 
 
Minimum Guarantee
Each State's share of apportionments for aggregate sum of specified programs is at least 90.5% of its percentage contributions to the Highway Account of the HTF
100%
105

* Denotes appropriate section in Title 23, U.S. Code.
Source: U. S. Department of Transportation, Financing Federal-Aid Highways, Appendix E.

 

 

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