3.8 CRASH CLASSIFICATION BY LOCATION

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    Posted: Aug/27/2018 at 12:15pm – author:Kellee_TSASS
    3.8 Crash Classification by Location
     
    3.8.1 roadway-related location 
     
    3.8.1.1 introduction: The purpose of this classification is to describe a road vehicle traffic crash in terms of its location with respect to roadways. 
     
    3.8.1.2 categories: There are two mutually exclusive categories for classification of road vehicle traffic crashes in terms of location with respect to roadways. These are: 
     
    • On-roadway crash (See 2.7.1)
    • Off-roadway crash (See 2.7.2)
     
    3.8.1.3 inadequate information: If there is insufficient information to determine clearly in which category a road 
     
    vehicle traffic crash belongs, classify the crash as an on-roadway crash. 
    3.8.2 junction-related location 
     
    3.8.2.1 introduction: The purpose of this classification is to describe a road vehicle traffic crash in terms of its location with respect to junctions. 
     
    3.8.2.2 categories: There are four mutually exclusive categories for classification of road vehicle traffic crashes in terms of location with respect to junctions. In order of precedence, these are: 
     
    • At-intersection crash (See 2.7.3)
    • Driveway access crash (See 2.7.4)
    • Intersection-related crash (See 2.7.5)
    • Nonjunction crash (See 2.7.6)
    3.8.3 administrative class of trafficway 
     
    3.8.3.1 introduction: The purpose of this classification is to describe a traffic crash in terms of the administrative class of trafficway on which it occurred. 
     
    3.8.3.2 categories: There are six mutually exclusive categories for classification of traffic crashes by administrative class of trafficway. In order of precedence these are: 
     
    • Interstate highway crashes (See 2.5.4)
    • Other U.S. route numbered highway crashes (See 2.5.5)
    • Other state route numbered highway crashes (See 2.5.6)
    • County road crashes (See 2.5.7)
    • City street crashes (See 2.5.8)
    • All other traffic crashes 
     
    3.8.3.3 intersections or interchanges: For traffic crashes within intersections or interchanges, assign the administrative class of trafficway as follows: 
     
    — In an at-intersection crash, assign the crash to the highest class of trafficway at the intersection.
     
    — In an interchange crash, assign the crash to the highest class of trafficway in the interchange unless 
     
    the crash occurs on the lower class trafficway and does not occur at the connections of ramps and lower class roadways. Crashes which occur at the connections of ramps and the lower class roadways, including those in merge / diverge lanes, should be assigned to the highest class trafficway in the interchange (See Figure 7) (See also 3.8.3.4). 
     
    3.8.3.4 ramps or frontage roads: A ramp or connecting road at an intersection or interchange is presumed to be part of the highest class of trafficway with which it connects. A frontage road is not considered to be a ramp or connecting road. 
     
    3.8.3.5 first harmful event: The location of the first harmful event determines the trafficway classification for the traffic crash. When the first harmful event does not occur on a trafficway the traffic crash should be attributed to the class of trafficway on which the unstabilized situation originated. 
     
    3.8.3.6 overlapping systems: Some sections of trafficways are on more than one administrative system. For example, a highway may have both a U.S. route number and a state route number. In such a case, a traffic crash should be assigned to the highest administrative system at the crash location. 
     
    3.8.3.7 inadequate information: In any case where there is a question as to which administrative class of trafficway a traffic crash should be assigned, it should be assigned to the higher class. 
    3.8.4 access class of trafficway 
     
    3.8.4.1 introduction: The purpose of this classification is to describe a traffic crash in terms of the access class of trafficway on which it occurred. 
     
    3.8.4.2 categories: There are two mutually exclusive categories for classification of traffic crashes by access class of trafficway. These are: 
     
    • Fully controlled access highway crashes (See 2.5.15)
    • Other traffic crashes 
     
    3.8.4.3 guide to classification: Classification of traffic crashes by access class of traffficway should be compatible with classification of crashes by administrative class of trafficway (See 3.8.3). 
    3.8.5 land use character 
     
    3.8.5.1 introduction: The purpose of this classification is to describe the location of a road vehicle traffic crash in terms of the general area in which it occurred. 
    3.8.5.2 categories: There are two mutually exclusive categories for classifying road vehicle crashes with respect to location by land use character. These categories are: 
     
    • Urban area crash (See 2.5.1)
    • Rural area crash (See 2.5.2)
    3.8.6 political subdivision 
     
    3.8.6.1 introduction: The purpose of this classification is to describe the location of a road vehicle crash in terms of the political subdivision in which it occurred. 
     
    3.8.6.2 categories: Any city, county, state, or other political jurisdiction is a possible category for classification of a road vehicle crash by political jurisdiction. Such categories are not necessarily mutually exclusive. 
     
    3.8.6.3 guide to classification: The location of the first harmful event is presumed to be the crash location for purposes of classification of road vehicle crashes by political jurisdiction. 
    3.8.7 bikeway-related location 
     
    3.8.7.1 introduction: The purpose of this classification is to describe a road vehicle traffic crash involving one or more pedalcycles in terms of its location with respect to bikeways. 
     
    3.8.7.2 categories: There are four mutually exclusive categories for classification of road vehicle traffic crashes in terms of location with respect to bikeways. These are:
     
    • Bicycle trail (also known as shared use paths) crashes (See 2.2.44)
    • Bicycle lane crashes (See 2.2.45)
    • Shared road crashes (See 2.2.46)
    • Non-bikeway crashes 
     
    3.8.7.3 inadequate information: If there is insufficient information to determine clearly in which category a road vehicle traffic crash belongs, classify the crash as a non-bikeway crash. 
     
     
     

    Edited by Kellee_TSASS – Aug/27/2018 at 12:16pm

     

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