United States Department of Transportation
i
Drunk Driving Warning System (DDWS). Volume 2, Field Test Evaluation
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1983-12-01
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[PDF-13.62 MB]
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Edition:Final report
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Abstract:The Drunk Driving Warning System (DDWS) is a vehicle-mounted device for testing driver impairment and activating alarms. The driver must pass a steering competency test (the Critical Tracking Task or CTT) in order to drive the car in a normal manner. The emergency flasher system operates when the test is failed; and if the car is driven faster than 10 mph, the horn honks periodically, once per second. The CTT/DDWS concept and hardware were developed under earlier contracts. The purpose of this work was to evaluate the feasibility of the concept, both in its sensitivity to alcohol impairment and in terms of various practical considerations in assigning the device to DWIs as a judicial sanction in a probationary setting. Volume II of the final report describes the field test conducted to 1) test the performance of the CTT/DDWS in an operational setting, and 2) identify and solve the practical operational issues related to CTT/DDWS implementation through a municipal court system under various state laws and state agency operating procedures. Background is given on the pursuit of legal feasibility, and obtaining the support and/or cooperation of state and local agencies. Subject selection, processing, and assignment procedures are reviewed. Subject CTT/DDWS performance is analyzed and no inconsistencies are evident in comparison with the Volume I controlled laboratory results. Debriefing information and other project experience is summarized to address issues of user and public acceptance of the DDWS concept. Based on analysis of field test results and comparison with previous laboratory findings, the CTT/DDWS is shown to effectively detect driver impairment. Implementation of DDWS through a court system with the assistance of state agencies is shown to be feasible. Future options for the current DDWS equipment and future developments are also discussed. /Abstract from report summary page/
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