IGNITION INTERLOCKS STOP DRUNK DRIVING Type of first-time offender ignition interlock device (IID) law Effective date of current IID law .08 BAC starts stopped via interlock
Drinking and driving occurrences stopped by an interlock
Alabama Alaska Arizona Arkansas California Colorado
All All All All All All All
7/1/14 1/1/09 9/1/07 4/1/09 7/1/10 1/1/09 1/1/12 1/1/15 4/1/13 10/1/08 5/1/99
719
3,797
9,617
117,430 563,515 306,066 1,024,279
59,782 40,521 124,455 92,503
4-county pilot
816,497 157,713
Connecticut
21,518
Delaware
721
4,710
District of Columbia
Optional .15 BAC
25
165
Florida Georgia Hawaii Idaho Illinois Indiana
49,744 15,250 6,445
662,208 108,860 62,336 31,028 707,485
No All No All
1/1/11
10/1/00
4,638
1/1/09 1/1/15 7/1/95
96,456
Discretionary
1,290
7,939
Iowa
.10 BAC
127,633 58,497
595,473 410,491
Kansas
All
7/1/11
Kentucky Louisiana
.15 BAC
6/25/15 7/1/07 12/1/13 10/1/11 1/1/06 10/1/10 10/1/14 3/1/14 5/1/09 1/1/09 7/1/05 7/1/07 1/1/10 6/1/05 8/1/10 12/1/07 9/1/08 11/1/11 1/1/08 10/1/03 7/1/11 10/1/14 7/1/11 7/1/13 9/1/15 7/1/09 7/1/11 7/1/12 1/1/09 6/1/08 7/1/10 7/1/09 1/1/15
371
2,029
All All
60,970
379,814 36,901 140,305 243,665 451,594 325,875 148,395 30,060 181,913 37,476 186,869 461,774 433,437 129,704 108,103 239,430 240,871 462,998 18,289 55,661 0
Maine
5,185
Maryland
.15 BAC
18,491 37,983 86,393 58,350 2,835 28,174 4,512 22,178 6,099 8,850 39,676 62,231 84,233 14,007 16,641 27,785 38,522 78,210 26,613 18,594 8,066 6,270 10,067 103,913 15,046 156,860 0 1,296 1,015 1,487
Massachusetts
No
Michigan Minnesota Mississippi Missouri Montana Nebraska
.17 BAC .16 BAC
All All
Discretionary
All
Nevada
.18 BAC
New Hampshire
All
New Jersey New Mexico
.15 BAC
All All
New York
North Carolina North Dakota
.15 BAC
Discretionary Discretionary
Ohio
Oklahoma
.15 BAC
Oregon
All No
Pennsylvania Rhode Island South Carolina South Dakota
.15 BAC .15 BAC
7,787 8,345 8,605
.17 Optional
Tennessee
All All All All All All
160,771 120,567
Texas Utah
57,013 32,945 102,577 795,695 157,843 1,272,442
Vermont Virginia
Optional
Washington West Virginia
Wisconsin Wyoming
.15 BAC .15 BAC
15,772
97,993
= 12,717,738
= 1,776,509
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