One person died Monday morning in a series of crashes on an icy stretch of Interstate 80 in Summit County involving 23 vehicles — most of them semi trucks — which closed both the eastbound and westbound lanes of the freeway. The freeway was closed at Echo Junction, mile marker 172, about 7:30 a.m., and traffic was being diverted onto Old Echo Road while the Utah Department of Transportation brought snow plows and salt trucks into the area, according to the Utah Highway Patrol. UHP said “extremely snowy and icy” roads led to five separate crashes on a half-mile span of highway.