Traffic volume data, especially average annual daily traffic (AADT), are important in transportation engineering. They are required in managing and maintaining existing facilities and in planning and designing new facilities. Many state highway agencies use the ramp counting procedure described in FHWA’s Traffic Monitoring Guide to estimate AADTs for freeways. The procedure involves counting all entrance and exit ramps between two established mainline counters (anchor points) and then reconciling the count data to estimate mainline AADT. The reconciling of count data includes three steps. First, AADTs for the ramps and the anchor points are estimated from the count data. Then AADT for each uncounted mainline link is calculated by addition or subtraction of ramp AADT to or from mainline AADT, starting from one anchor point. Finally, adjustments of the AADT are performed to achieve a match at the second anchor point if necessary. The process can be time-consuming and labor-intensive if it is done manually. A computer program to automate the process is required. The traffic count analysis system (TCAS) developed to automate the reconciling of count data in the ramp counting process is described. The TCAS was developed on the basis of data coaptation and data reconciliation techniques frequently used in the processing of network flow rate data. Data coaptation is used to calculate flow rates for uncounted links, and data reconciliation is used to adjust and balance the flow rates. The TCAS has been tested for the two longest freeways in Connecticut. The results are close to those from the ramp counting procedure. However, the TCAS significantly reduces the time and labor required for processing traffic volume data for freeways.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Data Reconciliation–Based Traffic Count Analysis System


    Additional title:

    Transportation Research Record: Journal of the Transportation Research Board


    Contributors:


    Publication date :

    1998-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Data Reconciliation-Based Traffic Count Analysis System

    Zhao, M. / Garrick, N. W. / Achenie, L. E. K. et al. | British Library Conference Proceedings | 1998


    Data Reconciliation Based Traffic Count Analysis System

    M. Zhao / N. W. Garrick / L. E. K. Achenie | NTIS | 1997


    Data Reconciliation Based Traffic Count Analysis System. User's Guide

    M. Zhao / N. W. Garrick / L. E. K. Achenie | NTIS | 1997


    Traffic data reconciliation and brokering

    SCHLESINGER BENNY / WEINBERG SHIRA | European Patent Office | 2023

    Free access

    TRAFFIC DATA RECONCILIATION AND BROKERING

    SCHLESINGER BENNY / WEINBERG SHIRA | European Patent Office | 2019

    Free access