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The CDL program, initiated in January 1985, introduced stronger licensing standards, expanded knowledge and driving competency testing, required employers to store certain violations, and implemented stricter post-licensing sanctions. Intervention time series analysis was used for data analysis. Results indicate the CDL program produced no statistically significant effect on the fatal or fatal/injury accident series.",{"@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/evaluation-of-californias-commercial-driver-license-program-march-1995/298750/",{"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/evaluation-of-californias-commercial-driver-license-program-march-1995/298750.png","ImageObject",300,407,{"name":92,"@type":93},"Guten tag","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-28","2026-09-18",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 purpose of this report on California’s CDL program?","Question",{"text":113,"@type":114},"The report evaluates how California’s Commercial Driver License program affected fatal and fatal/injury accidents involving heavy vehicles driven by California-licensed drivers.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"What methodology does the report use to analyze the program’s impact?",{"text":118,"@type":114},"Intervention time series analysis is used to evaluate the data and assess effects on accident series.",{"name":120,"@type":111,"acceptedAnswer":121},"What conclusion does the report reach about the CDL program’s effect on accidents?",{"text":122,"@type":114},"The results show no statistically significant effect on either the fatal accident series or the fatal/injury accident series.","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},298750,1789764613,{"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":130,"read_time":145,"preview_page_count":4},687212321768,"https://ap-avatar.wpscdn.com/avatar/a0010bdbe886d2fe77?x-image-process=image/resize,m_fixed,w_180,h_180&k=1789897067658708522","STATE OF CALIFORNIA  \nDEPARTMENT OF MOTOR VEHICLES  \nEVALUATION OF CALIFORNIA’S  \nCOMMERCIAL DRIVER LICENSE PROGRAM  \nByRobert A. Hagge and Patricia A. Romanowicz  \nMarch 1995  \nResearch and Development SectionProgram and Policy Administration  \nCalifornia Department of Motor Vehicles  \n\n|  |  |  |  |  | Form Approved  \u003Cbr>OMB No. 0704-0188   |  |  |\n| --- | --- | --- | --- | --- | --- | --- | --- |\n| suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188), Washington, DC 20503.   |  |  |  |  |  |  |  |\n|  |  | 2. REPORT DATE  \u003Cbr>March 1995   |  | 3. REPORT TYPE AND DATES COVERED   |  |  |  |\n| 4. TITLE AND SUBTITLE   |  |  |  |  | 5. FUNDING NUMBERS   |  |  |\n| 6. AUTHOR(S)   |  |  |  |  |  |  |  |\n|  |  |  |  |  | 8. PERFORMING ORGANIZATION  \u003Cbr>REPORT NUMBER  \u003Cbr>RSS-95-148   |  |  |\n|  |  |  |  |  | 10. SPONSORING/MONITORINGAGENCY REPORT NUMBER   |  |  |\n|  |  |  |  |  |  |  |  |\n|  |  |  |  |  |  | 12b. DISTRIBUTION CODE   |  |\n| 13. ABSTRACT (Maximum 200 words)  \u003Cbr>This report evaluates the impact of the Commercial Driver License (CDL) program on fatal  \u003Cbr>The program, which was initiated in January 1985, began a new commercial-licenseclassification and endorsement system, implemented stronger licensing standards and morecomprehensive tests of knowledge and driving competency, required driverstoreport specificviolations to employers, and provided for more stringent post-licensing sanctions to negligentoperators. Intervention time series analysis was used for data analysis. The results indicatethat the CDL program did not have a statistically significant effect on the fatal or fatal/injuryaccident series.   |  |  |  |  |  |  |  |\n| 14. SUBJECT TERMS  \u003Cbr>fatal/injury accidents   |  |  |  |  |  |  | 15. NUMBER OF PAGES35   |\n|  |  |  |  |  |  |  |  |\n| OF REPORT  \u003Cbr>Unclassified   | 18. SECURITY CLASSIFICATIONOF THIS PAGEUnclassified   |  | 19. SECURITY CLASSIFICATIONOF ABSTRACTUnclassified   |  |  |  |  |\n\nNSN 7540-01-280-5500 Standard Form 298 (2-89)  \nPrescribed by ANSI Std. Z39-18  \nPREFACE  \nThis report presents findingsof an evaluation of the impact of California's CommercialDriver License program on fatal and fatal/injury accidents involving heavy vehiclesoperated by drivers licensed in California. The present report is being issued as aninternal monograph of the Department of Motor Vehicles' Research and DevelopmentSection rather than as an official report of the State of California. The findings andopinions may therefore not represent the views and policies of the State of California.  \nACKNOWLEDGEMENTS  \nThis report presents results of an evaluation of California's Commercial Driver License(CDL) program. The study was conducted under the general direction of Raymond C.Peck, Research Chief, and Dr. Mary Janke, Research Scientist III. William Marsh,Research Program Specialist II, provided technical and research design assistance. Dr.Richard McCleary of the University of California, Irvine provided technical consultationon time series analysis. Debbie McKenzie, Staff Service Analyst, produced the tablesand graphs.  \nBev Christ and Gloria Smith of the Information Services Unit of California HighwayPatrol (CHP) provided the accident data from CHP's Statewide Traffic Records System.The California accident data from DMV's Drivers License masterfile were provided byprogrammers Stuart Noda and Harinder Dhillon, under the direction of EDP'sApplication Development Group I managers Ernie DeGraaf and Larry Smith. MarjorieSoccoccio and Gary DeChenes of the Department of Transportation's (DOT's)  \nNationwide Highway Traffic Safety Administration (NHTSA) supplied the nationwidefatal accidents data from NHTSA's Fatal Accident Reporting System. Marsha Reynoldsof DOT's Federal Highway Administration's Office ","cbCair3H2ETWzJzT","https://ap.wps.com/l/cbCair3H2ETWzJzT","pdf",1085594,39,"English","# Preface\n# Acknowledgements\n# Executive Summary\n## Background\n## California’s CDL implementation","[{\"question\":\"What is the purpose of this report on California’s CDL program?\",\"answer\":\"The report evaluates how California’s Commercial Driver License program affected fatal and fatal/injury accidents involving heavy vehicles driven by California-licensed drivers.\"},{\"question\":\"What methodology does the report use to analyze the program’s impact?\",\"answer\":\"Intervention time series analysis is used to evaluate the data and assess effects on accident series.\"},{\"question\":\"What conclusion does the report reach about the CDL program’s effect on accidents?\",\"answer\":\"The results show no statistically significant effect on either the fatal accident series or the fatal/injury accident series.\"}]","Evaluation of California’s Commercial Driver License Program - March 1995 | PDF",98]