Alabama Ecrash Data Element Manual
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Alabama eCrash Data Element Manual (DEM) for the ALABAMA UNIFORM TRAFFIC CRASH REPORT AUTCR January 5, 2009 PREFACE The Alabama Uniform Traffic Crash Report is the only approved form for reporting motor ve- hicle crashes occurring within the State of Alabama. All law enforcement agencies within the state that are responsible for investigating and reporting motor vehicle traffic crashes must utilize this form when submitting reports. Traffic crash reports are the most important source of information for agencies concerned with traffic safety. For these reports to be useful in saving lives it is imperative that they be co m- pleted accurately and in a uniform manner. This requires a common understanding of the mean- ing of all data elements on the part of reporting law enforcement officers who gather these data and all users of these data. The only possible value that a traffic crash can have is in preventing a similar occurrence in the future. The only way that this value can be realized is through accurate, consistent and complete reporting of all of the facts surrounding these crashes. This Data Element Manual has been created to provide a definition of each data element that is collected and thereby enable the officers to resolve questions that will arise as they complete the eCrash form. It should also provide users of these data a similar understanding so that they will interpret and use the data properly. Its intent is to provide for training of officers and data users and to serve as a reference guide. The numbers given to the data items in this document are for reference purposes to their original documentation only – they do not appear in the eCrash data entry program. 1 TABLE OF CONTENTS PAGE Contents 0.0 Introduction...........................................................................................................................................10 0.1 Overview Level .............................................................................................................................10 0.2 Location and Time Level ..............................................................................................................10 0.3 Unit Super Level ...........................................................................................................................11 0.4 Driver/Non-Motorist Level ...........................................................................................................11 0.5 Vehicle/Non-Motor Vehicle Level................................................................................................12 0.6 Uninjured Occupant Level ............................................................................................................12 0.7 Victim Level..................................................................................................................................12 0.8 Unit Roadway Environment Level................................................................................................13 0.9 Truck/Bus Supplement Level ........................................................................................................13 0.10 Diagram, Narrative and Crash Roadway Environment Level.......................................................13 0.11 Investigation Level ........................................................................................................................13 1.0 OVERVIEW LEVEL (eCrash Page) ....................................................................................................14 1.1 Status .............................................................................................................................................14 1.1.1 Amendment............................................................................................................................14 1.1.2 Error Correction .....................................................................................................................15 1.2 Case Numbers ...............................................................................................................................15 1.2.1 Local Case Number ...............................................................................................................15 1.2.2 DPS Case Number .................................................................................................................15 1.3 Summary Statistics (Including Unit Types) ..................................................................................15 2.0 LOCATION AND TIME LEVEL ........................................................................................................16 2.1 Introduction to Location Specification..........................................................................................16 2.1.1 Multiple Roadway Identifiers ...............................................................................................16 2.1.2 Crashes at Intersections ........................................................................................................17 2.1.3 Crashes at Interchanges ........................................................................................................19 2.1.4 Non-Intersection and Non-Interchange Crashes...................................................................20 2.1.5 General Considerations for Assigning Node Codes .............................................................20 2.1.6 Background Information on Alabama’s Location System ...................................................21 2.1.7 Circumstance Data Items .......................................................................................................23 2.2 Location & Time (eCrash Page).......................................................................................................24 2 2.2.1 Date and Time........................................................................................................................24 2.2.1.1 Date .....................................................................................................................................24 2.2.1.2 Time ....................................................................................................................................24 2.2.2 County and City .....................................................................................................................24 2.2.2.1 County .................................................................................................................................24 2.2.2.2 City ......................................................................................................................................24 2.2.3 Local Zone .............................................................................................................................25 2.2.4 Latitude/Longitude Coordinates ............................................................................................25 2.2.4.1 Status ...................................................................................................................................25 2.2.4.2 (Coordinate) Type; Latitude and Longitude........................................................................25 2.3 Street Information (eCrash Page) ..................................................................................................25 2.3.1 On Street, Road, or Highway.................................................................................................25 2.3.1.1 Street/Road Name ...............................................................................................................25 2.3.1.2 Street/Road Code.................................................................................................................26 2.3.1.3 (On Road) Milepost.............................................................................................................26 2.3.1.4 Highway Classification .......................................................................................................27 2.3.1.5 Controlled Access ...............................................................................................................27 2.3.1.6 Highway Side ......................................................................................................................28 2.3.2 ―AT Intersection OF‖ or ―BETWEEN‖ (Node 1) .................................................................28 2.3.2.1 (At) Street/Road Name ........................................................................................................28 2.3.2.2 (At) Node Code (Node 1)....................................................................................................30 2.3.3 AND (Node 2) .......................................................................................................................30 2.3.3.1 (And) Street/Road Name (Node 2)......................................................................................30 2.3.3.2 Node Code (Node 2) ...........................................................................................................30 2.3.4 Distance From Node 1 ...........................................................................................................32 2.3.4.1 Applicability and Measurement ..........................................................................................32 2.3.4.2 Units (Feet or Miles) ...........................................................................................................32