If you have any doubt that a driver talking on their cell phone is dangerous, Progressive Insurance has news for you.

The company recently conducted a survey about cell phone use in cars. And what Progressive found should give pause to any trucker who shares the road with four-wheelers.

Of those respondents who have talked on a cell phone while driving alone:

• 46 percent have swerved into another lane
• 41 percent have sped up
• 23 percent have tailgated another car
• 21 percent have cut someone off
• 18 percent have nearly hit another car
• 10 percent of people have run a red light