Collection and analysis of 2013-2014 travel time data.
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Collection and analysis of 2013-2014 travel time data.

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  • English
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    • Creators:
    • Corporate Creators:
      University of Kentucky Transportation Center
    • Corporate Contributors:
      Kentucky. Transportation Cabinet
    • Subject/TRT Terms:
    • Publication/ Report Number:
      KTC-17-13/PL27-1F
    • Resource Type:
      Tech Report
    • Geographical Coverage:
    • Corporate Publisher:
      University of Kentucky Transportation Center
    • Abstract:
      This report documents the findings of Planning Study 27, Collection and Analysis of 2013-2014 Travel Time Data, which is a continuation of Planning Study 24, Analysis of Historical Travel Time Data. The main scope is to analyze newly acquired link-referenced speed data on Kentucky roads from 2013 and 2014. Travel time-based performance measures developed in Planning Study 24 were calculated using these data. These measures were combined with those from 2011-2012 to evaluate performance trends over the four-year period. Additionally, at different points during the course of this study, the data vendor released multiple new datasets produced through refined data processing approaches. The research team evaluated those datasets at selected locations to better understand their characteristics. Further, a procedure was developed to calculate system performance measures established by FHWA’s final rule on system performance measures to assist KYTC in its preparation process. The performance measures generated in this study include travel time index, planning time index, buffer index, annual hours of delay, and percentage travel under congested conditions. Due to the requirement of traffic volume information by delay measures, network conflation was first undertaken by the Kentucky Transportation Cabinet (KYTC) to integrate the vendor’s and state highway inventory networks. Analysis was based on the conflated network and results were provided to KYTC and metropolitan planning organization (MPO) stakeholders in the form of geodatabases. A web portal was also developed to facilitate dissemination of and access to the data. Results of the analysis demonstrate the value of probe data in measuring and tracking the performance of roadways across several years. In addition, such data can help KYTC and MPOs identify bottlenecks in the network, prioritize improvement strategies, and assess the effectiveness of projects. As data collection techniques advance, the coverage and quality of probe data will continue to improve. It is advisable for KYTC to maintain a steady stream of such data to assist with data-driven decision making for a variety of applications.
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