More than 300 miles of Interstate 80 in Wyoming are under a rolling closure as of Wednesday morning.

According to WYDOT, the interstate is closed from Evanston to Laramie.

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That's a 309-mile stretch of highway.

Here's how WYDOT defines a rolling closure:

When a town is at capacity, which can happen during a long-duration closure, the closure will be rolled back to the next town to avoid stranding travelers in a location without adequate services. The road may be open in the direction leading away from the affected area.

While the roads appear mostly clear, WYDOT webcams show a snow-covered highway in the Elk Mountain area.

It's unclear when the closures will be lifted.

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