挖地底隧道的费用说不定足够建几座大桥, 如果建的起地下隧道, 根本就可以建 mrt , 还 brt 干什么?
西边一条毛 发表于 26-4-2012 09:11 PM
當然挖地下隧道很貴比起建高架橋。
可是據我所知,真正比較起來,依然還是地底捷運貴更多不是嗎?地鐵貴在整體的系統。。。
檳城不可能硬是在原本就很擁擠的空間上硬是弄出一條BRT車道,或建高架天橋。。。
其實不是全部都弄成地下BRT啦,有空間的地段,無需大興土木影響環境生活素質,就可以讓BRT出土啊。。。
In tunnels or tunnel systems
A special issue arises in the use of bus vehicles in metro transit structures. Since the areas where the demand for an exclusive bus right-of-way are apt to be in dense downtown areas where an above-ground structure may be unacceptable on historic, logistic, or environmental grounds, use of BRT in fully underground tunnels may not be avoidable. Since buses are usually powered by internal combustion engines, bus metros raise ventilation issues similar to those of tunnels. In the case of tunnels, powerful fans typically exchange air through ventilation structures on the surface, but are usually placed in a location as remote as possible from occupied areas to minimize the effects of noise and concentrated pollution. |