U.S. flag

An official website of the United States government, Department of Justice.

NCJRS Virtual Library

The Virtual Library houses over 235,000 criminal justice resources, including all known OJP works.
Click here to search the NCJRS Virtual Library

Illinois Secretary of State Breath Alcohol Ignition Interlock Devices (BAIID) Program Evaluation and Final Report Volume II: Pilot Implementation Evaluation

NCJ Number
Richard A. Raub; Roy E. Lucke; Richard I. Wark
Date Published
June 2001
40 pages

This report presents findings from the evaluation of the effectiveness of the Illinois Breath Alcohol Ignition Interlock Device (BAIID) pilot program, which was begun in June of 1994 and is still in effect (June 2001).


The BAIID device is installed in the vehicle that is to be operated by the individual required to use the device. The device locks out the vehicle's ignition until a satisfactory breath sample is delivered. Before delivering the breath sample, the individual must activate the device, allow it to warm up, and complete a self-test cycle. The individual then delivers a breath sample in much the same manner as is done for an evidentiary breath test instrument. The BAIID device measures breath alcohol concentration (BrAC) in the same manner as the evidentiary devices. If the test shows a result below 0.025, the BAIID will allow the engine to start. If the result is 0.025 or higher, the vehicle will not start. If there are three BrAC readings of 0.05 or higher in 30 minutes, the BAIID will cause the vehicle to become inoperable for 24 hours. After the vehicle starts under initial testing, the BAIID will require the participant to take a rolling re-test. If the participant fails to take this retest or if the retest results show a BrAC of 0.05 or higher, the BAIID will cause the vehicle horn to begin blowing immediately and continue until the ignition is turned off. Based on the evaluation of the pilot program, BAIID apparently is a valuable tool that helps in reducing driving under the influence of alcohol by those who previously were likely to continue to drink and drive; however, an approach is needed that will effectively prevent driving while impaired or in more severe cases, driving at all. 8 tables, 3 figures, and 16 references