Many 18-wheelers slowly drove along Interstate 20 on Thursday night. With temperatures remaining below freezing, it'll be at least another day until the roads clear up. As TxDOT has warned this week, don't travel unless you need to. Crews are working to clear accidents, but they keep happening, so it's very slow going for the drivers on Interstate 20 in Nolan, Taylor and Callahan Counties. The Sweetwater Fire Department, Sweetwater Police Department, Nolan County Sheriff's Office and local DPS Troopers have responded to many calls for service including vehicle accidents and stranded motorists this week. Shown above is a wreck on I-20 near Alabama.