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迴旋處

迴旋處
英國布里斯托(Bristol)嘅一個迴旋處

迴旋處英文Roundabout,或者叫圓形地)係一種。佢多數形係打個圈咁,中間留塊圓形唔畀入,車就響圓外邊行。迴旋處駁咗三條,或者再多啲嘅路嘅路口。車到咗迴旋處路口,會停低,等圈來緊嘅車走咗,先至行。好處係可以唔使用紅綠燈,都可以控制到路口交通,另外亦唔使車等太耐,就可以轉去其他路口,因為只要一但進入迴旋處,一定可以好暢順咁離開迴旋處。

之不過,如果車太多,就會要排隊進入迴旋處。而高速公路因為車速要高,通常都好少有迴旋處,避免車速減慢排隊。所以高速公路嘅迴旋處,通常係用喺出口嘅交匯處。

中間圓形地有大有細,有啲只係馬路油咗個圓,有啲用來做綠化地帶,有啲大到用來起。但其實比較正確嘅係中間唔可以放會遮擋視線嘅嘢,喺呢個原則下想種花種草都得。

[編輯]

全世界第一個迴旋處就係1901年設喺法國巴黎凱旋門[未記出處或冇根據]。而英國嘅迴旋處喺五年之後喺萊奇沃思田園城市英文Letchworth,原本攞嚟做行人安全島[1][2]

[編輯]
  1. BBC News. "Roundabout Magic". 喺2007-05-13搵到.
  2. Letchworth Garden City Heritage Foundation. "Sign of the Times". 原著喺2006-10-16歸檔. 喺2006-12-14搵到.
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迴旋處
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