尽管如此,高速公路管理局仍选择寻求其他办法以解决交通拥堵,而不是花费大量资金扩宽车道。2006年,工党政府在伯明翰M42公路推出一项试点计划,即主动交通管理系统。该计划沿公路每隔500米设置电子信号架、安装闭路摄像头并允许交通繁忙时将路肩带用作额外车道,将道路容量提升了约三分之一。议员们通过了可变限速的议案,即在车辆低速、匀速行驶下亦可增大道路容量。
Since then the project, now known as smart motorways, has become more ambitious. Oncertain roads the hard shoulder can be used as a fourth lane at all times. Rather than plastera motorway with words in flashing lights, more effective signs with pictures are now in use,says Graham Dalton, the chief executive of the Highways Agency. This means that non-Englishspeaking truck drivers are more likely to take note, he adds. Future schemes may also havefewer emergency lay-bys, after it was found that many Britons used them to fiddle with theirphones or for a toilet break.
自该项目以后,现在被称为智能高速的这一项目变得更加雄心勃勃。在一些路段,坚硬的路肩可以被用作第四车道。高速公路管理局首席执行官格雷厄姆道尔顿称,公路上张贴的闪光字将会被更有效的图片标志所取代,他补充说道,这意味着这些标志将更可能被不使用英语的卡车司机留意到。未来预计将减少应急车道,因为调查显示很多英国人占用应急车道只是为了玩玩手机或者去趟厕所。
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