(WINSTON-SALEM, N.C.) -- If you feel many of your fellow motorists seem to be making up the rules of the road as they drive, it may be because they don’t know the rules.
A newly-released 2011 GMAC Insurance study shows that roughly 18 percent of American drivers would not pass the written driver’s test if taken today. And be extra careful while driving in New York and Washington, D.C. -- the survey found 34 percent of all drivers in New York and the nation’s capital failed the written test. Wyoming had the lowest percentage of failure, with just 4.5 percent.
The survey finds motorists in Kansas lead the nation in road knowledge, with an average written test score of 82.9 percent. Those Washington, D.C. drivers are at the bottom of the rankings, with an average test score of 71.8 percent.
Additional stats from the GMAC Insurance study:
-- 27.2 percent of women failed the test, compared to 13.6 percent of men.
-- The Northeast is the worst driving region, with average scoring of 74.9 percent. The Midwest is the best driving region, with average scoring of 77.5 percent.
-- The oldest drivers tested -- those between the ages of 60 and 65 -- continued to have the highest average test scores: 80.3 percent.
The 2011 GMAC Insurance National Driver’s Test survey involved 5,130 licensed drivers between the ages of 16 and 65.
Copyright 2011 ABC News Radio