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Developed by the Traffic Injury Research Foundation (TIRF) with workshop contributions, it summarizes technology capabilities, certification, tampering resistance, and program effectiveness through outcome and process evaluation. The report also identifies current challenges such as circumvention, participation, eligibility, authority, duration, and cost, then provides best-practice recommendations and future directions for interlocks.",{"@graph":69,"@context":123},[70,84,106],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/best-practices-for-alcohol-interlock-programs-a-driving-force-for-safety/308145/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/best-practices-for-alcohol-interlock-programs-a-driving-force-for-safety/308145.png","ImageObject",300,407,{"name":92,"@type":93},"Blaney","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-09-19",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",12,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What is the main mission behind the alcohol interlock best-practices report?","Question",{"text":113,"@type":114},"The report is produced under the Traffic Injury Research Foundation’s mission to reduce traffic-related deaths and injuries. It focuses on identifying causes of road crashes and developing programs and policies to address them effectively.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"How does the report describe the effectiveness of interlock programs?",{"text":118,"@type":114},"Evaluations are described as consistently reporting substantially lower DWI recidivism among interlock participants while the device remains installed. After removal, recidivism rates are reported as comparable between participants and non-participants.",{"name":120,"@type":111,"acceptedAnswer":121},"What issues does the report highlight for improving interlock programs?",{"text":122,"@type":114},"Current issues include circumvention, participation rates, judicial or administrative authority, duration of participation, eligibility, traffic safety benefits, and program cost. These feed into recommended best practices for program design and oversight.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},308145,1790391658,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":140,"language":141,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":142,"faqs":143,"seo_title":144,"seo_description":67,"update_tm":145,"read_time":146,"preview_page_count":4},1236954677761,"https://us-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","Best practices for  \nalcohol interlock programs  \nA DRIVING FORCE FOR SAFETY  \nTRAFFIC INJURY RESEARCH FOUNDATION  \nThe Traffic Injury Research Foundation  \nThe mission of the Traffic Injury Research Foundation (TIRF) is to reduce traffic related deaths and injuries.  \nTIRF is a national, independent, charitable road safety institute. Since its inception in 1964, TIRF has become internationally recognized for its accomplishments in a wide range of subject areas related to identifying the causes of road crashes and developing programs and policies to address them effectively.  \nTraffic Injury Research Foundation  \n171 Nepean Street, Suite 200  \nOttawa, Ontario K2P 0B4  \nPh: (613) 238-5235  \nFax: (613) 238-5292  \nEmail: [tirf@trafficinjuryresearch.com](tirf@trafficinjuryresearch.com)  \n[Website: www.trafficinjuryresearch.com](Website: www.trafficinjuryresearch.com)  \nApril 2001  \nTraffic Injury Research Foundation Copyright © 2001  \nISBN: 0-920071-14-7  \nBest Practices for Alcohol Interlock Programs  \nDouglas J . Beirness  \nFinancial support provided by:  \nGUARDIANINTERLOCKSYSTEMSCORP.    \nGuardian Interlock Systems Corp. Transport Canada Royal & SunAlliance  \nAcknowledgements   \nThe Montreal workshop and the production of this report were supported by Guardian Interlock Systems, Transport Canada, and Royal & SunAlliance.  \nThe author acknowledges the contributions of all participants at the Montreal workshop, particularly Bob Voas, Paul Marques, Cliff Helander and Claude Dussault who made presentations and facilitated the discussion on various topics.  \nThe author also wishes to thank Jean-Claude Mercure for generously providing the facilities for the workshop and Robyn Robertson for providing administrative support.  \n- i  \nTraffic Injury Research Foundation  \n\n| Table of Contents |  |\n| --- | --- |\n|  |  |\n\nPage  \n[Executive Summary ........................................................................................ vi](Executive Summary ........................................................................................ vi)i  \n1.0 Introduction ....................................................................................................... 1  \n1.1 Background 1  \n1.2 History 2  \n1.3 Purpose of the report 4  \n1.4 Scope of the report 4  \n2.0 State of the Art................................................................................................... 7  \n2.1 Does the technology work? 7  \n2.1.1 Alcohol detection and accuracy 8  \n2.1.2 Tampering and circumvention protection 10  \n2.1.3 Specifications and certification 12  \n2.2 The Effectiveness of interlock programs 15  \n2.2.1 Outcome evaluation 15  \n2.2.2 Process evaluation 20  \n2.3 Conclusion 23  \n3.0 Current Issues ................................................................................................. 25  \n3.1 Circumvention 25  \n3.2 Participation rates 26  \n3.3 Judicial or administrative authority 27  \n3.4 Duration of program participation 28  \n3.5 Eligibility 29  \n3.6 Traffic safety benefits 30  \n3.7 Cost 31  \n3.8 Conclusions 31  \n4.0 Best Practices for Interlock Programs........................................................... 33  \n4.1 Perspective 33  \n4.2 Legislation 35  \n4.3 Equipment 35  \n4.4 Service provider 36  \n4.5 Eligibility for program participation 37  \n4.6 Voluntary versus mandatory participation 38  \n4.7 Program authority 39  \n4.8 Monitoring 40  \n- iii  \nTraffic Injury Research Foundation  \n4.9 Program duration 41  \n4.10 Integration of programs 42  \n4.11 Summary 43  \n5.0 Future of Interlocks ......................................................................................... 45  \n5.1 Interlocks in all vehicles 45  \n5.2 Universal vehicle interlock modules 46  \n5.3 Commercial use of interlocks 46  \n5.4 Driver identification 47  \n5.5 Electronic driver’s licence 47  \n5.6 Tailored programs 48  \n5.7 Pre-conviction program participation 49  \n5.8 Conclusions 49  \n6.0 References and Bibliography ..........................................","cbCairkQ7EIPBMCd","https://ap.wps.com/l/cbCairkQ7EIPBMCd","pdf",877071,76,"English","# Executive Summary\n# 1.0 Introduction\n## 1.1 Background\n## 1.2 History\n## 1.3 Purpose of the report\n## 1.4 Scope of the report\n# 2.0 State of the Art\n## 2.1 Does the technology work?\n## 2.2 The Effectiveness of interlock programs\n## 2.3 Conclusion\n# 3.0 Current Issues\n## 3.1 Circumvention\n## 3.2 Participation rates\n## 3.3 Judicial or administrative authority\n## 3.4 Duration of program participation\n## 3.5 Eligibility\n## 3.6 Traffic safety benefits\n## 3.7 Cost\n## 3.8 Conclusions\n# 4.0 Best Practices for Interlock Programs\n## 4.1 Perspective\n## 4.2 Legislation\n## 4.3 Equipment\n## 4.4 Service provider\n## 4.5 Eligibility for program participation\n## 4.6 Voluntary versus mandatory participation\n## 4.7 Program authority\n## 4.8 Monitoring\n## 4.9 Program duration\n## 4.10 Integration of programs\n## 4.11 Summary\n# 5.0 Future of Interlocks\n## 5.1 Interlocks in all vehicles\n## 5.2 Universal vehicle interlock modules\n## 5.3 Commercial use of interlocks\n## 5.4 Driver identification\n## 5.5 Electronic driver’s licence\n## 5.6 Tailored programs\n## 5.7 Pre-conviction program participation\n## 5.8 Conclusions\n# 6.0 References and Bibliography","[{\"question\":\"What is the main mission behind the alcohol interlock best-practices report?\",\"answer\":\"The report is produced under the Traffic Injury Research Foundation’s mission to reduce traffic-related deaths and injuries. It focuses on identifying causes of road crashes and developing programs and policies to address them effectively.\"},{\"question\":\"How does the report describe the effectiveness of interlock programs?\",\"answer\":\"Evaluations are described as consistently reporting substantially lower DWI recidivism among interlock participants while the device remains installed. After removal, recidivism rates are reported as comparable between participants and non-participants.\"},{\"question\":\"What issues does the report highlight for improving interlock programs?\",\"answer\":\"Current issues include circumvention, participation rates, judicial or administrative authority, duration of participation, eligibility, traffic safety benefits, and program cost. These feed into recommended best practices for program design and oversight.\"}]","Best Practices for Alcohol Interlock Programs - A Driving Force for Safety | PDF",1789860954,192]