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