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- W3140449449 abstract "State Departments of Transportation collect traffic data every year to support pavement design, to enforce weight restrictions on highways and bridges, and to provide planning data for highway improvements. Reliable weigh in motion (WIM) data is particularly important to provide Level 1 and Level 2 truck traffic data for the FHWA Mechanistic Empirical Pavement Design Guide (MEPDG). After the NCDOT collects WIM station data and converts it from proprietary vendor format to an ASCII text format, the quality of the data must be checked. During the quality control (QC) procedures, tests identify incomplete data sets, out of range values for individual vehicle classes, and other possible data problems. This paper documents how the NCDOT QC checks are programmed in Access and applied to one year of calibrated data for each WIM station. The software includes automatic checks that flag and report questionable data. It also facilitates manual checks and visual interpretation of the data using local knowledge of the WIM sites. After performing QC for 45 WIM stations, there were about 100 databases stored in approximately 50 gigabytes of data including plots, reports, and tables. The QC results confirmed that NCDOT equipment captured reliable WIM measurements. Vehicle class and weight checks generate 0.97% and 6.42% anomalies, respectively. Average QC run-time was 60 minutes per WIM station. Manual inspection of questionable data further clarified the results finding that only three WIM stations had more than 10% flagged weight records with a majority of them caused by vehicle misclassifications." @default.
- W3140449449 created "2021-04-13" @default.
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- W3140449449 date "2010-01-01" @default.
- W3140449449 modified "2023-09-26" @default.
- W3140449449 title "NCDOT Quality Control Methods for Weigh in Motion Data" @default.
- W3140449449 hasPublicationYear "2010" @default.
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