Interstate 40 closed in Arizona as winter storm disrupts travel

A major winter storm has closed Interstate 40 and other highways in northern Arizona, with the Department of Public Safety investigating a deadly crash involving a tractor-trailer that occurred as conditions deteriorated. Snowfall led to several inches accumulating on the roads, prompting officials to urge residents to stay off the highways until the weather improved. The storm is part of a larger weather system affecting the central and southern U.S., expected to bring similar hazardous conditions to northern states. Meanwhile, a multi-vehicle crash on eastbound Interstate 70 in Colorado resulted in road closures and detours being set up for commuters. Additionally, U.S. Highway 40 near Granby, Colorado, was closed due to another serious crash involving two vehicles, necessitating transport of several individuals to hospitals. Officials in both states are still assessing the situations and working on clearing the roads.