历史与人物en.wikipedia.org
芝加哥的整体抬升
The Raising of Chicago
2013 — 2025，它一次次回到首页
黑点是上首页（≥ 50 分）的那次投稿，空心点是没冲上去的投稿，点越大分数越高。
导读
这篇维基百科条目讲述19世纪芝加哥为改善排水、排污和泥泞问题，如何把街道以及许多建筑逐步抬高。工程分阶段进行，留下了架空人行道、地下层街道等至今可见的城市痕迹。
为什么经久不衰：它记录了现代机械出现前市政工程的大胆执行，也解释了芝加哥城市形态中一些至今可见的奇特细节，因此反复吸引读者。
HN 评论精选
19世纪芝加哥的土木工程（如反转芝加哥河）大胆惊人，值得重新认识。
芝加哥在19世纪搞雄心勃勃的工程时毫不含糊：反转芝加哥河就是个例子，还有很多老照片。不过今年为了应对洪水，河流又被暂时反转回去。学校里我们常说“航空航天工程师造炸弹，土木工程师造靶子”，但土木工程其实很酷，尤其是想到他们在现代技术出现之前能做到这些。
rayiner查看英文原文
Chicago didn't fuck around when it came to ambitious 19th century engineering: http://99percentinvisible.org/post/57747785222/episode-86-reversal-of-fortune (reversing the Chicago river--this has a lot of great old pictures). Although, see: http://chicagoist.com/2013/04/19/photos_what_re-reversing_the_chicag.php#photo-1 (reversing it back temporarily this year to account for flooding). In school we used to say "aerospace engineers make bombs; civil engineers make targets." But in fact civil engineering is really cool, especially in terms of what they were able to do before modern technology: http://www.colorcoat-online.com/blog/index.php/2011/05/engineering-the-history-12-projects-that-changed-the-world.
西雅图也有类似抬升，且先抬路后抬人行道曾造成危险和不便。
我参加西雅图游览时，导游说西雅图也经历过类似改造：整座城市基本被抬高了一层。但道路先被抬高，形成一种“华夫饼式”城市，行人过街要爬梯子过去，再从另一侧下梯子。有人因从梯子摔下、被别人撞下梯子或被街面落物砸中而受伤甚至死亡。人行道抬高到与街道齐平后，地下人行道还开放过一段时间，直到毒品和卖淫等问题出现，20世纪初才关闭；现在可以参观。
badman_ting查看英文原文
I took a tour of Seattle, and the guides discussed Seattle going through a similar transition. Essentially the whole city was raised by one story. But the roads were done first, creating a sort of "waffle-like" city, where crossing the street as a pedestrian meant climbing a ladder, crossing the street, and descending the ladder on the other side. People were sometimes injured or killed by falling down the ladder, someone else falling down the ladder, or things falling onto them from street level. After the sidewalks were raised to match the streets, the underground sidewalks were kept open for a time, until (predictably) problems started with drugs and prostitution, etc. They were closed in the early 20th century but you can tour them today.
芝加哥至今可见架空人行道等抬升工程的遗迹。
住在芝加哥，很高兴还能看到这项工程的遗迹，比如“架空人行道”：现在的人行道悬在五英尺多高的空中，下面就是旧人行道。
graupel查看英文原文
Living here in Chicago it's neat to see the vestiges of this still around - like 'vaulted sidewalks', where the current sidewalk sits over 5 feet of air, and then the old sidewalk is down below: http://gapersblock.com/airbags/archives/city_streets_how_chicago_raised_itself_out_of_the_mud_and_astonished_the_world/
芝加哥多层街道分流了装卸车辆，减少了街面拥堵和鸣笛。
说个相关的：在曼哈顿和芝加哥市中心都走过的人，有没有注意到芝加哥的汽车喇叭声少得多？朋友指出，这是因为芝加哥有下层街道，很多服务车辆在那里装卸货。曼哈顿所有人都挤在同一街面；一辆UPS棕色卡车停20秒，后面的黄色出租车司机就不耐烦地猛按喇叭。
jasode查看英文原文
On a related note for anyone who has walked around both Manhattan and downtown Chicago... Ever notice how downtown Chicago has much less noise of honking cars than downtown New York City? A friend pointed out it's because of Chicago's lower-level streets[0] that a lot of service vehicles use for loading/unloading. That's in contrast to Manhattan where everybody has to share the same street level. E.g. a brown UPS truck that stops for a mere 20 seconds is enough for the yellow cab driver that's stuck behind him to smash on the horn with impatience. [0] https://en.wikipedia.org/wiki/Multilevel_streets_in_Chicago
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