MADISON, Wis. -- Residents and commuters are still digging out and braving snow- and ice-covered roads after more than a foot of snow fell from this week's winter storm.

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The major snowstorm that crept across southern Wisconsin Tuesday and Wednesday caused widespread power outages, hundreds of school closings and treacherous travel.

As many returned to work and school on Thursday, traveling around became of optimum concern. There are two crashes snarling traffic in the area. The first happened at Gray Road, near County Road CV, where a car and train collided. There's no word on injuries there. Meanwhile, a school bus and car collided on 10th Drive, west of Montello, in Marquette County. No one was hurt in that crash.

Officials are advising motorists to drive carefully as frigid temperatures have transformed many snowy roadways into ice. Madison police report that there are several dicey areas throughout the city. Outbound John Nolen Drive was actually shut down during rush hour on Wednesday morning.

Plow crews were out in full force Wednesday and overnight as they tried to clean up after the storm. City officials opted not to switch over trucks from plowing to salting duty. Major highways are clear, according to the Dane County Highway Department, but with blowing, and drifting snow, there's concern the roads can become icy and slippery.

Officials are advising drivers to give plow drivers enough room to clear the streets. They suggest staying 100 feet back.

Thousands of customers were without power on Wednesday because of the storm, but utility officials said that situation is improving. MG&E officials said that all power was restored late Wednesday night.

Alliant Energy officials reported that as of 3:15 p.m. Thursday, all power was restored in Dane, Jefferson, Walworth and Columbia counties.

Alliant Energy said there were still some outages Thursday afternoon in Rock County -- 45 outages in Janesville and two in Edgerton. Officials said crews are continuing to work on the problem.

Now, officials are urging people to take heed of the cold temperatures. The Dane County Department of Emergency Management said that the National Weather Service is predicting temperatures will remain below 20 degree though Saturday morning with wind chill hovering between -5 degrees and -10 degrees. They said that pavement and sidewalks are "dangerously slick across Dane County" and highway crews continue to work across the county to clear the roads.

Stay tuned to WISC-TV and Channel 3000 for continuing coverage.