ASTM WK35821

    New Specification for / Guide for Highway Classification Systems with User Requirements and Test Methods

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    Developed by Subcommittee: E17.52 | Committee E17 | Contact Staff Manager



    WK35821

    1. Scope

    Rationale:The need for standard specifications for those agencies installing and utilizing classification data for motorized travel is a very key component to successful traffic monitoring systems. Local, state and federal traffic data users would benefit from standards that allow vendors and those using the data to have common specifications. These specifications will also lead to consistent data less dependent on individual settings and collection practices that may exist between different agencies. Common industry standards for classification algorithms, arrays and installation guidelines will help agencies collect and report better quality information. SCOPE:This specification for highway classification systems describes the process of measuring the axles spacing and proper classification of vehicles to the FHWA or other desired scheme. Calibration specifications for class sites to include speed verification, wheelbase, vehicle length, and axle spacing check using both vehicles under 10 and over 60. Minimum of 40 vehicle to be checked either by using the traffic stream or by utilizing a vehicle with a known spacing. Out of these 40 vehicles no more than 4 can be miss classified. Quality control methods for both field and office classification checks will be detailed to ensure good quality data. New installation specifications that will cover acceptance standards, the array, sensor selection and more.

    The need for standard specifications for those agencies installing and utilizing classification data for motorized travel is a very key component to successful traffic monitoring systems. Local, state and federal traffic data users would benefit from standards that allow vendors and those using the data to have common specifications. These specifications will also lead to consistent data less dependent on individual settings and collection practices that may exist between different agencies. Common industry standards for classification algorithms, arrays and installation guidelines will help agencies collect and report better quality information.


    Keywords

    classification, classification algorithm, axle, axle spacing, axle class, axle sensor, ::wheelbase, vehicle length, speed and length class :

    The title and scope are in draft form and are under development within this ASTM Committee.

    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    01-03-2012

    Technical Contact:
    Steven Jessberger

    Status:
    Draft Under Development