Requirements for Road Design Suitable for Japanese version of Shared Space

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H03757
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 90010:Design-related
• Research Institution: University of Tsukuba
• Principal Investigator: Yamamoto Sari 筑波大学, 芸術系, 教授 (90300029)
• Co-Investigator(Kenkyū-buntansha): 伊藤 誠 筑波大学, システム情報系, 教授 (00282343) ; 矢野 博明 筑波大学, システム情報系, 教授 (80312825)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 道路環境デザイン / 舗装 / 振動 / 歩車共存 / リスクマネジメント

Outline of Final Research Achievements

With the goal of implementing Shared Space, field surveys in Japan and overseas, pedestrian risk assessment experiments, and experiments using a driving simulator with sway were conducted to determine the effects of road pavement design, vibration, and speed on drivers' impressions. The results showed that a design with a diagonal line pattern without a distinction between sidewalk and roadway was rated significantly more “tense,” and “too fast” than conventional pavements with a separation between sidewalk and roadway, and that vibration added to this pattern was not “unpleasant” at low speeds but “unpleasant” at high speeds. Therefore, it was inferred that vehicle speed may naturally slowdown in an environment with a diagonal pattern and vibration. These results were summarized to extract the requirements and scope of application of road environment design suitable for the Japanese version of Shared Space.

Free Research Field

デザイン

Academic Significance and Societal Importance of the Research Achievements

本研究成果によって、シェアード・スペースにおいて視覚的な刺激に加え振動も含めると車両運転者のスピード感が増すことが示された。結果としてこのような舗装を施すことによって自然と車両速度が減じられることを予測することができた。ラストワンマイルの空間における車両速度を減じるための手法を提案できたことは学術的・社会的意義が大きい。さらに舗装のパターンの幅や凹凸についても実験を通して具体的に提案できた点は意義が大きいと考えられる。