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信号無視と一度に渡
る人数の関係性
L130433 大西浩平
目的
横断歩道は何人で渡る
時が一番信号無視をしな
い(する)かを調べる。
概要
○集計期間
→12月25日~1月3日
○集計時間
→16:00~17:00
○集計方法
→信号付きの横断歩道がある歩道の隅に立ち、目視
で横断人数と信号無視の数を計測しノートに転記。
計測場所
・車通りが多い
・十字路上の横断歩道
結果予測
・知り合いと2人だったら信号無視するの
は気まずいし悪印象与えそう…
・知り合いいなかったら少しくらいいいよ
ね…
→1人で渡る時が一番信号無視の割合が多
い?
では実際に見てみましょう……
2013/12/25~2014/01/03の横断人数表
全体 12月25日 12月26日 12月27日 12月28日 12月29日 12月30日 12月31日 1月1日 1月2日 1月3日合計
1人 207 188 231 220 153 162 208 303 271 247 2190
2人 16 23 30 22 18 25 34 83 63 67 381
3人 13 12 19 15 10 9 22 52 31 28 211
4人 2 1 4 5 3 2 10 30 23 25 105
5人 6 0 1 2 5 3 7 17 13 14 68
6人 0 5 2 0 2 4 2 3 4 2 24
7人 2 0 1 2 3 0 3 7 5 5 28
8人 0 0 0 0 0 0 1 13 5 7 26
9人 0 1 0 0 2 0 0 3 4 1 11
10人 0 0 1 0 0 1 2 7 4 0 15
11人 0 0 0 0 0 1 0 13 7 4 25
12人 1 0 0 0 0 0 0 5 2 2 10
13人 0 0 0 0 0 0 0 7 0 1 8
14人 0 1 0 0 1 0 0 8 0 2 12
15人以上 0 0 0 0 0 0 0 2 0 2 4
2013/12/25~2014/01/03の信号無視数表
信号無視 12月25日 12月26日 12月27日 12月28日 12月29日 12月30日 12月31日 1月1日 1月2日 1月3日合計
1人 31 35 43 37 25 18 39 57 43 38 366
2人 1 0 0 1 0 2 2 5 3 2 16
3人 0 1 1 1 0 1 3 3 2 0 12
4人 0 0 0 1 0 0 0 4 5 4 14
5人 3 0 0 1 2 1 4 9 4 6 30
6人 0 2 1 0 0 1 0 1 1 0 6
7人 0 0 1 1 1 0 1 3 2 0 9
8人 0 0 0 0 0 0 0 5 3 0 8
9人 0 0 0 0 0 0 0 0 0 0 0
10人 0 0 0 0 0 0 0 1 1 0 2
11人 0 0 0 0 0 0 0 4 3 1 8
12人 0 0 0 0 0 0 0 2 0 0 2
13人 0 0 0 0 0 0 0 3 0 0 3
14人 0 0 0 0 0 0 0 2 0 1 3
15人以上 0 0 0 0 0 0 0 1 0 0 1
表では意味が
分からないので…
集計日全ての横断人数、
信号無視人数を
1グループの人数ごとに
合計し、比較してみた。
0%
5%
10%
15%
20%
25%
30%
35%
40%
45%
50%
0
500
1000
1500
2000
2500
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
信号無視の割合
横断人数
一度に横断する人数(1グループの人数)
人数別の信号無視割合と横断人数
信号無視 全員 信号無視の割合
考察
●2,3人の時は信号無視をしにくいが、4人以上にな
ると信号無視をしがちになる
→予測通り2人の時の信号無視の割合は少なかった
が、4人以上になると信号無視をしてしまうのは、2
人の時には働いていたお互いを牽制する力が多人数
に分散することによって弱まってしまったというこ
とと、仲の良い人も渡っているし別にいいよね…と誘
惑に負けてしまったことによるものだと考えられ
る。
傍観者効果…他の人も行動を起こさない、行動を起こさないことがそこでの適切な反応。
今回で言えば、何人かの友人が信号無視で渡ってるから信号無視でも渡るのが適切…
観察により分かったこと
 異性の二人組は信号無視をしない。
 信号無視をする子どもはほぼいない。
 たいてい中年の男性、女性。
 家族連れは基本母親が止めるので信号無視をしない
が、父親がしてしまうと子どもたちがついて行き、
結果母親もついて行く。
 学生は4人以上でかたまると信号無視をしやすい。3
人まではほぼしない。
反省点
正月が期間に入っていたことで初詣
客など通常の日にはありえない結果
になってしまった。
→長期休みではない平日に実施すべき
だった?

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信号無視と一度に渡る人数の関係性