Abstract
In Nanao City, Ishikawa, it was a sudden snowfall (the following, "guerrilla heavy snowfall") in a short time in January, 2009, and a traffic jam occurred in the various places in city. Therefore, the snow removing was late, and the emergency transportation was late, too.
So, Ishikawa Prefecture performed the review of the snow removing system with this guerrilla heavy snowfall as a lesson in the next year. As a result, in January, 2011, similar guerrilla heavy snowfall was generated, but the traffic jam in the city didn't occur that much, and the big hindrance didn't produce the delay of the emergency transportation either.
Therefore, in this study, I analyzed the snowfall situation of the year before and after the snow removing system improvement, the traffic jam situation and snow removing dispatch data and compared the difference quantitatively.
In addition, after guerrilla heavy snowfall, the study meeting the study meeting was held by prefecture, country, city, town and association of construction industry, and they built the area snow removing cooperation system, so I carried out an interview investigation about the real enforcement situation and progress.
