Why highways keep buckling in the searing heat

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This summer’s heat has been taking a toll on the nation’s aging transportation. It’s evident in all the videos showing up of highways and other roads buckling into dangerous mounds of jagged pavement.

Suyun Paul Ham, a civil engineer at the University of Texas at Arlington, explains why roads and rails can’t always handle the heat. He also describes some of the innovations engineers are developing to keep roads healthier with far less hassle for travelers.

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Stacy Morford

Environment + Climate Editor

When highways buckle, the damage can happen quickly, putting drivers in danger and tying up traffic. AP Photo/David Goldman

Stuck bridges, buckling roads − extreme heat is wreaking havoc on America’s aging infrastructure

Suyun Paul Ham, University of Texas at Arlington

A civil engineer explains why roadways and rails warp and crack in the heat − and points to some innovative ways to keep the US transportation system healthy as long as possible.

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