誤上國道時你該怎麼辦? - 重機

By Dorothy
at 2009-07-03T22:59
at 2009-07-03T22:59
Table of Contents
建議看底下網址板,有動畫實際的說明圖
有圖有真相:(已經原po同意轉文)
http://motocity.com.tw/gp2/viewtopic.php?t=235627
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前幾天有一則機車騎士逆向在國道上事故身亡的新聞,
想也知道,大名頂頂的M01又是一陣撻伐。
甚至,有人堅持萬一誤上國道,應該立即調頭,
逆向由原來的入口下來.....
明明就已經有人逆向被撞死了,
還是有人堅稱逆向下來,會比順著車流走安全...
小弟思考了許久,與其在那邊說得一口好車,
不如直接做一些模擬,結果一目了然...
以下這幾個動畫,是小弟利用3D軟體,依照實際比例尺去製作模型,
輸入速度等參數,得出的結果,畫面因為沒錢賺,當然是簡單做就好,
但是你看到的相對速度幾乎與真實世界沒差別,
所以可以當作一個很好的參考依據...
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假設 :
條件一. 國道上汽車平均速度為100km/h...
條件二. 王小明騎著一台機車誤上國道了...
條件三. 來車大約距離你100公尺左右才會發現你.....
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1. 如果王小明打算在國道上調頭,一般機車迴轉約需3~5秒,
迴轉半徑約為1.5~2公尺(大型重機則半徑更大),絕對超過一般路肩的範圍,
也就是說,當王小明進行迴轉動作時,會有3~5秒等於打橫在外側車道上,
此時與後方來車的相對速度是100km/h,請問來車有多少時間能閃避王小明?
答案是 : 3.45秒,若是扣掉看到,意識過來要躲,身體開始有反應,車子慣性...
只剩不到1.5秒...
若是王小明真的想不開要迴轉,要先確認後方150公尺內無來車,
若是150公尺內有來車,或是來車速度超過100km/h,
王小明可能就要祈禱上帝會來接他...
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2. 如果王小明很幸運的在國道上調了頭,沒被撞成肉餅,
並且以40km/h的速度,慢慢的逆向往回騎,
此時與後方來車的相對速度是140km/h,請問來車有多少時間能閃避王小明?
答案是 : 2.4秒...扣掉上面啦哩啦雜的,大約剩0.6秒...
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3. 如果王小明很幸運的在國道上調了頭,沒被撞成肉餅,
王小明很急著下國道,以70km/h的速度,逆向直直往回衝,
此時與後方來車的相對速度是170km/h,請問來車有多少時間能搞清楚王小明是飛彈還是
超人?
答案是 : 2秒...扣掉上面啦哩啦雜的,大約剩0.2秒...
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4. 如果王小明很幸運的在國道上調了頭,沒被撞成肉餅,
並且很幸運的,沒遇到利用路肩超車的汽車,活著撐到了交流道...
王小明以40km/h的速度,逆向沿著交流道騎下去,此時有汽車以50km/h上交流道,
汽車與王小明的相對速度是90km/h,那麼汽車駕駛的眼前很有可能見到這個光景...
請問,汽車駕駛在彎道中,突然看到一台機車對他衝過去,他會有什麼反應?
緊急煞車?方向盤往左打?他能夠做出正確判斷嗎?
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5. 如果,王小明不要慌張,沿著國道繼續往前行駛,等到下個交流道再出去,
雖然王小明的小棉羊疏於保養,極速只有70km/h,但是此時與後方來車的相對速度只有
30km/h,
那麼來車的眼前看到的將會是這個光景...請問,來車有多少時間可以意識到王小明的存
在?
答案是 : 11秒...11秒夠不夠來車看清楚並做出反應?絕對夠的...
來車駕駛在看到王小明之後,甚至還可以喝口飲料,拿起相機幫他拍張紀念照,
然後再慢條斯理的減一點速,幾乎沒有可能會發生撞擊(王小明不要蛇行就好)...
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整個的概念其實很簡單,順著車流走,絕對比停著不動,或是逆向來得安全太多,
人們可能會因為相對速度過大,來不及反應,而撞上路上的輪胎、石頭等等,
但是,幾乎沒有人可能撞上比他慢個30km/h的車輛,
更不用說要撞到跟他等速前進的任何車輛了...
繳一張罰單,總比收到一堆白包來得好吧....
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