WASHINGTON — Spending on transportation infrastructure construction is likely to grow a modest 3% next year to a total of $130.3 billion, according to the American Road and Transportation Builders Association's annual forecast.

Federal, state, and local spending are all unlikely to ramp up investment, said Alison Premo Black, ARTBA's chief economist. The two-year transportation funding law passed earlier this year provides no new money through its expiration in September 2014. But Black lauded the potential of that legislation's expansion of the Transportation Infrastructure Finance and Innovation Act loan program to help drive new investment in some areas.

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