Development of Area-Specific Lane Distribution Factors for Pavement Design
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2023-05-01
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Edition:Final Report (January 2022–May 2023)
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Abstract:Lane Distribution Factor (LDF) is a critical input for pavement design, and the Georgia Department of Transportation (GDOT) is currently using outdated design LDF values based on old traffic data. To address this issue, a previous study (RP 21-11) was conducted to update statewide design LDF values. The study recommended the adoption of separate LDF tables for different area/facility types to support GDOT’s pavement design practice. However, this finding raises the question of whether specific LDF values should be considered for freight-intensive areas, such as Savannah and Atlanta. Additionally, the previous study was based on four-year (2018-2021) data, which covers only pre-COVID and COVID periods. As COVID restrictions have been removed and life has returned to normal in 2022, this study also aims to evaluate whether there is any remaining COVID impact on LDFs using the latest 2022 data.
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