A California woman was killed early Monday morning when she lost control of her pickup on an icy portion of Interstate 80 in southern Wyoming's Sweetwater County.

The Wyoming Highway Patrol says 51-year-old April Kirby was headed east pulling a travel trailer when she lost control of her pickup on an icy bridge deck outside of Wamsutter.

The Patrol says the pickup went into the median and went airborne, landing roof down on a guard rail and crushing Kirby who was buckled up.

The trailer became disconnected from the pickup and was completely destroyed.

The Patrol says it's possible Kirby fell asleep while she was driving.