The U.S. transportation construction infrastructure market is expected to show modest growth in 2013, increasing 3 percent, from $126.5 billion to $130.3 billion, according to the American Road & Transportation Builder’s Association’s annual economic forecast.

Growth is expected in the areas of highway and street pavements, airport terminal and runway work, railroads, and port and waterway construction. The bridge market, which has shown substantial growth over the last 10 years, is predicted to remain flat this year.

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