Economic Benefit Analysis of the Construction and Keeping Open Program Under the Condition of Unidirectional Closure of Highway Reconstruction and Expansion Project

Highway traffic accidents often cause traffic disruptions, leading to economic losses. The current methods of quantifying and reporting road traffic accident losses in China are unclear, lacking analyses of economic losses in reconstruction and expansion projects. Given the variety of traffic organization design schemes involved in reconstruction and expansion projects, a model was proposed to calculate the economic losses from traffic accidents under two modes: “construction while keeping traffic open” and “one-way closure.” The calculation key points of economic losses from accidents were clarified. The key points of traffic organization schemes under one-way closure conditions were established. The analysis covered economic losses from accidents, construction period savings, reduction of project costs, and operational toll revenue benefits. The economic benefits of different traffic organization modes were compared to provide references for selecting traffic organization schemes in other projects.