The Iowa Department of Transportation posted a video showing a crash that occurred on Interstate 235 to emphasize the importance of changing lanes.

The footage shows a truck pulled over on the shoulder of the roadway in Des Moines. A white sedan can be seen drifting onto the shoulder and crashing into the back end of the truck, causing the car to flip over.

With the "Move over, slow down" law expanding as of July 1 to include all vehicles with flashing lights, this video from one of our I-235 cameras shows how quickly things can go wrong when you aren't paying attention/moving over. Amazingly, no one was seriously injured.