Released by the American Road and Transportation Builders Association, the report points to more than 1,200 bridges across the state as being structurally deficient.
However, Iowa, like South Dakota, has about 20% deficiency in the structure of its total bridges, preceded by Rhode Island and Pennsylvania with Rhode Island in the lead with 25% deficiency.
That's good for second behind Iowa, which again led the annual report with 4,968, also an improvement for the state from previous year. Bridges with one or more key elements in poor condition are deemed structurally deficient. The part of I-95 that covers Olde Richmond and Fishtown was the most traveled in the state, with 208,978 daily crossings. Some bridges are labeled "functionally obsolete" because they were built before new standards were adopted. "It is outdated, overused, underfunded and in desperate need of modernization", Black says. In the District, 3.7 percent of 245 bridges are in need; in Maryland, it's 5.8 percent of 5,321 bridges; in Virginia, it's 6.7 percent of 13,892 bridges.
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"America's highway network is woefully underperforming", Black said. And while the nation's inventory of structurally deficient bridges has declined 0.5% since 2015, it would take more than two decades to replace or fix all of them if the current pace holds. A bridge is classified as structurally deficient and in need of fix if its overall rating is four or below.
The most vulnerable bridges, according to the ARTBA are at Iowa, Pennsylvania, Oklahoma, Missouri and Nebraska 4,968 identified bridges puts Iowa ahead of the other four states.
Established in 1902, Washington, D.C. -based ARTBA is the "consensus voice" of the US transportation design and construction industry before Congress, the White House, federal agencies, news media and the general public.