円滑性と安全性に着目した道路の性能評価指標  [in Japanese] A MEASURE-OF-EFFECTIVENESS INDEX FOCUSED ON SMOOTHNESS AND SAFETY FOR PERFORMANCE-BASED ROAD DESIGN  [in Japanese]

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Abstract

性能照査型設計では性能評価指標が重要な役割を果たす.本研究では,道路の機能が拠点間のアクセシビリティの確保であるとの認識の下,他の拠点への"行きやすさ度"が評価すべき性能であると考え,交通機能の主たる要素である安全性と円滑性に着目した性能評価指標を提案する.<br>まず,ドライバーの眼前に広がる走行環境に対する局所的評価とドライバーが認識する"行きやすさ度"の程度を関連づける評価構造モデルを構築した.次いで,ドライビング・シミュレータを用いた室内実験により,モデルの特定と現象説明力の検証を行い,提案した指標の既往指標に対する優位性を確認した.また,提案したモデルを組み込み,道路交通特性に関する常時観測データから性能評価指標値を算定するための方法論を提示し,事例分析によりその有用性を明らかにした.

In conducting performance-based design of road, an index of measure-of-effectiveness plays an important role. Currently, travel speed is suggested as the measure-of-effectiveness, because smooth access to activity bases is a purpose of road development, and a dominant factor for smooth movement under the condition if safe driving is guaranteed. However, driver is forced to pay attention and is strained under ever-changing traffic condition to maintain safety. This fact means that the forced efforts for maintaining safety should be evaluated adequately.<br>This study develops a measure-of effectiveness index for evaluating traffic function of road sections from a view point of accessibility to activity bases. The index is formulated as an aggregated point-basis evaluation focused on both safety and smoothness, The calibration of the proposed model is made by using driver's subjective evaluation data to the driving environment collected from experiments with driving simulator. A procedure to estimate the value of index from traffic counter data is also developed. Through a case study, the proposed index shows a better description ability than those of current measure-of-efficiency index based on travel speed.

Journal

  • Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management) 71(5), I_985-I_990, 2015

    Japan Society of Civil Engineers

Codes

  • NII Article ID (NAID)
    130005114721
  • Text Lang
    JPN
  • Article Type
    journal article
  • ISSN
    2185-6540
  • Data Source
    IR  J-STAGE 
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