A structural engineer inside the Arlington Memorial Bridge in Washington. (Matt McClain/The Washington Post)

The new report on our nation’s crumbling infrastructure painted a troubling and familiar picture for many of the region’s iconic roadways, most notably the Arlington Memorial Bridge [“More than 55,000 bridges need repair or replacement,” Politics & the Nation, Feb. 17].

The bridge, built as a symbol of reconciliation between the North and South after the Civil War, is an important symbolic and historic site for our country as well as a major road for commuters in the D.C. area, but it needs a $250 million rehabilitation.

This is hardly an isolated case. Across the national park system, which includes the bridge, there is $12 billion in needed repairs, half of which are to park roads, bridges and other transportation infrastructure. This deferred-maintenance backlog threatens some of the United States’ most important places, here in Virginia and across the country.

If we want to save the Arlington Memorial Bridge and all our national parks, the Trump administration and Congress must ensure that infrastructure investments include our parks and the roads that run through them.

Laura Loomis, Arlington

The writer is deputy vice president of government affairs for the National Parks Conservation Association.