A STUDY OF AN EVALUATION METHOD FOR PASSING AND NO PASSING SECTIONS IN ROAD IMPROVEMENT FOR 1.5 LANES

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  • 1.5車線的道路整備における待避区間の最適配置に向けた評価手法の検討

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 In hilly and mountainous areas, it is available to construct roads of 1.5 lanes which are flexible combinations of single-lane, 2-lane and local road improvements in recent years. In construction works, 1.5 lanes are effective for temporary traffic of large-size vehicles. However, if traffic is heavy, it is complicated to decide appropriate passing places with using traffic simulations repeatedly. Therefore, we developed a new evaluation method for passing and no passing sections, and compared it to the results of a traffic simulator. The mean absolute errors of both results are 4.8 seconds for average waiting time and 3.3m for average passing space, which are very small values. To combine the method with optimization techniques, it will be possible to design for optimum arrangement of passing sections and effective maintenance plans.

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