A nationwide test suggests the Northeast has some pretty bad drivers.

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Discuss: Driving Horror Stories

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A study by GMAC Insurance shows drivers in Massachusetts, Rhode Island and New Jersey are the least knowledgeable about the rules of the road.

One out of five drivers from New Jersey and other states in the northeastern United States failed a two-part test. GMAC estimated that about one of 10 drivers nationwide would fail a written driver's test. Oregon drivers were regarded as the most knowledgeable.

GMAC administered the test to nearly 5,000 people nationwide. One out of three admitted speeding up to go through a yellow light even if there were pedestrians in a crosswalk.

One-third of drivers said they would operate a car after drinking alcohol if they felt they were OK to drive. Others lacked knowledge about basic rules.

The study ranked which states had the most knowledgable drivers:

1 Oregon
2 Washington
3 Iowa
4 Idaho
5 Wyoming
6 Vermont
7 Nebraska
8 Wisconsin
9 Montana
9 West Virginia
11 Minnesota
12 North Dakota
13 North Carolina
14 Indiana
15 Alabama
15 Nevada
15 Missouri
18 Virginia
19 Ohio
19 South Dakota
21 Colorado
22 Kansas
23 Michigan
24 New Hampshire
25 Tennessee
26 Maine
27 Arkansas
27 South Carolina
29 Georgia
29 New Mexico
31 Okalahoma
32 Texas
33 Utah
33 Arizona
35 Mississippi
36 Delaware
36 Kentucky
38 Pennsylvania
39 Louisiana
40 Illinois
41 Florida
42 Connecticut
43 California
44 Maryland
45 District of Columbia
45 New York
47 New Jersey
48 Massachusetts
49 Rhode Island