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南京长江隧道和扬子江隧道昨起免费通车

2016-01-02 07:09:16    南京晨报

上午9点,随着位于隧道江北出入口位置的简单剪彩仪式结束,扬子江隧道正式免费放行。原以为排队尝鲜的车辆不少,但记者到现场后才发现,虽然有车辆在排队,但跟想象中大有差别,这也直接让不少车主在过完隧道后表示车少,很好开。从记者来回两趟的过江时间看,基本都维持在5分钟,往返江南江北从未有如此的便捷。

不过,也许是开通初期,路面引导牌尚不完善,不少车主反映,从江南往江北很方便,进出口也好找,因为沿途的引导牌竖了不少,但从江北往江南就不太让人满意了。昨日随记者一同前往体验的还有3辆朋友的车,其中2辆在从江北返回江南时,因为没有在沿途看到及时的引导牌,竟然开到了前往长江隧道的路上。后来又折转回来绕了不少路,才找到扬子江隧道的入口。

  单向双车道存易堵车隐患

正是考虑到扬子江隧道采用了上下两层、单向双车道的通行模式,在开通初期,交管部门把本应和设计时速一致的80公里降到了60公里,虽然昨天首日运营秩序良好,但从车主的反映来看,普遍认为单向双车道有点窄,容易因事故造成堵车。

从记者昨日体验的过程来看,由于体验时车辆并不多,所以还是觉得隧道内很好开,但一旦旁边有车辆通过时,尤其是大型车的情况下,还是会觉得有些窄。此外,不少车主的担心不无理由,一旦一个车道因车祸发生拥堵或其他事故,在另一个车道车速受到影响的情况下,急救车辆都开不进来。

不过,虽然整个隧道在江水之中,但进入后并没有觉得视线受影响。隧道顶端是四组纵向排列的照明灯,虽然并不强烈,但通透明亮。因为扬子江隧道采用了不少降噪措施,这也直接让驾车者觉得行驶其间噪音并不大。记者 陈彦

  扬子江隧道为何采用 双管双层X形设计

■相关链接

扬子江隧道开通首日,不仅广大市民对这种双管双层X形设计倍感新奇,即便是放到目前国内外已经通车运营的过江隧道来比较,采取这一模式可以说都是新鲜事。作为南京跨江通道的主要规划者之一,国内知名专家、南京城市交通与规划设计研究院有限公司董事长杨涛向记者透露了隧道管形的创意特点。

扬子江隧道的双管双层X形不仅可以最大限度利用纬七路过江隧道盾构机大直径断面空间,在采用双管双层方式将两条盾构分离,形成X形分离式立体交叉,分别接纬三路快速路和扬子江大道快速路,既简化了隧道南岸的地下立交方案,减小了工程难度与风险,也节省了工程投资造价。更令人惊喜的是,原来最多只能是双向6车道的隧道方案,由此方案变成了双向8车道的隧道,通行能力大大增加。记者 陈彦

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