贵州的一条高速公路,特别设计了一个 U 型转弯的架空车道。这是因为贵州都是山区,如果错过一个高速公路出口,下一个出口可能在几十公里以外,所以增设一个 U 型转弯车道,让你快速调转车头。#科技爱好者周刊 (第 162 期)http://www.ruanyifeng.com/blog/2021/06/weekly-issue-162.html
https://twitter.com/ruanyf/status/1403160377592979457
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