What is the difference between being an assertive and aggressive driver? It's not simply to road rage or not to road rage. Not knowing can increase your insurance costs and possibly endanger lives. Are you constantly over the speed limit? Does yellow mean go faster? There are over 5 million car accidents annually. Know the facts. Drive safely. Enjoy the ride.

15th Annual Roadmap of State Highway Laws report found more than 400 state laws that could help lower U.S. collision and fatality rates.

Amanda Stephens, a research fellow at the Monash University Accident Research Center, knows a thing or two about aggressive driving.