Video captures 20 car pileup as it happens

CREATED Dec. 9, 2013 - UPDATED: Dec. 10, 2013

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MILWAUKEE - DOT cameras showed one of the big pileups from Sunday's snowstorm as it happened in Wisconsin.

In the video above, cars going too fast for conditions can't stop - and then lose control, causing a chain reaction. Three people died in traffic accidents as a result of Sunday's snowstorm.

Click through the photo gallery above to see more photos of Sunday's snowstorm