Floridians among worst drivers in U.S.

The 2010 GMAC Insurance National Drivers Test survey found that about 20 percent of licensed drivers – roughly 38 million Americans – would not pass a written drivers' exam if taken today.

Florida drivers ranked 41st, with a score of 75.2 percent. While that was up from 43rd in 2009, Florida's 2010 pass-fail rate fell dramatically from 2008, when it ranked 28th with a score of 78.6 percent.

The national average score slipped to 76.2 percent from 76.6 percent in 2009. Of the 5,202 drivers surveyed, 85 percent incorrectly answered a question about what to do when approaching a steady yellow traffic light, and many were wrong when asked to identify safe following distances.