暴風雪時の通行規制による減災効果と地域社会への影響に関する研究  [in Japanese] EFFECT OF INCREASING NUMBER OF ROAD CLOSE DUE TO WINTER SNOWSTORMS ON DISASTER MITIGATION AND LOCAL COMMUNITY  [in Japanese]

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Abstract

北海道東部の中標津町における通行規制を伴う暴風雪時を対象とし,携帯電話の位置情報による「モバイル空間統計」と「混雑統計」を用いて暴風雪時の交通行動を分析した.また,住民等の危機意識調査と通行規制の影響調査を行った.交通行動分析から,暴風雪時に中標津町とその周辺地域の住民は交通行動を中止していることおよび暴風雪前の事前準備行動を行うことが明らかとなった.意識調査から,暴風雪時の危機意識が高く,暴風雪に備える行動を行っていた.また,多くの関係者が通行規制による災害リスク回避に理解を示していることが示された.以上から,中標津町とその周辺地域において暴風雪時における住民の自発的な防災行動と行政による通行規制およびそれを住民が受容していることから暴風雪時の災害リスクを回避していることが明らかになった.

Snowstorm on roads create serious disaster in winter in Hokkaido, Japan. The Hokkaido Prefecture built up an early road close aims to prevent and mitigate damage recently. Number of road closes due to snow-storm has been increased since 2014. The aim of this report is to identify what kind of impact of the road close on travel behavior at Nakashibetsu city and how citizen of Nakashibetsu city assess the road close due to snowstorm. We evaluated travel behavior during snow storm bringing the road close using mobile phone GPS data. Mobile Spatial Statistics by NTT DOCOMO is used to estimate population in the central city area of Nakashibetsu. Traffic volume passed through the five screen lines surrounded the Nakashibetsu city using the “Konzatsu-Tokei Data©” from ZENRIN DataCom Co. Ltd. Based on the results of these analysis, the traffic volume passed through the five screen lines decreased sharply and most of citizen did not move out from their living areas during snow storms. Also, the traffic volume increased in order to prepare the snow storm on the previous day of the snow storm. We conducted questionnaire survey to the general public and hearing investigation to regional administrators and road administrators on July 2016. Results of investigations indicated citizen accepted the road close due to risk awareness to snowstorm in winter. Also, it is indicated that countermeasures like choosing the early road close and early information to recommend staying indoors to the general public were effective to reduce damages due to snowstorms. The citizen of Nakashibetsu city accepted demerits of the road close and became successful for avoiding an unnecessary risk due to snow storm in winter.

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) 74(5), I_55-I_63, 2018

    Japan Society of Civil Engineers

Codes

  • NII Article ID (NAID)
    130007556215
  • Text Lang
    JPN
  • Article Type
    journal article
  • ISSN
    2185-6540
  • Data Source
    IR  J-STAGE 
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