Many freeway/highway systems were overbuilt in an auto-obsessed era. It was decades later that cities realized they were actually healthier, greener, and safer without them.
Okay, you’re thinking, but where do all the cars go? It turns out that when you take out a high-occupancy freeway it doesn’t turn the surface streets into the equivalent of the Autobahn. A theory called “induced demand” proves that if you make streets bigger, more people will use them. When you make them smaller, drivers discover and use other routes, and traffic turns out to be about the same. Don’t believe it? Check out these freeway removals in cities all over the world and see for yourself.
One of the most transformative freeway removal projects not only tore out a dirty highway from a city center, it actually daylighted a lost waterway. An elevated highway had been built through Seoul in 1976 as a way to boost economic prospects in a low-lying area which had become a slum. In 2003, the city’s mayor proposed to remove the freeway and and turn the site into green space, which also required naturalizing the creek that once ran there.
Not only has the greenway become a well-loved part of the city, it has proven to benefit the city in many different ways. The temperature of the inner city has dropped 10-13 degrees, and birds, fish and other wildlife have returned to the urban core. Also, since the freeways were removed, fewer people are driving into the city, choosing to take public transit or other options. They even left a few freeway pillars as reminders of what came before.
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对高架路，个人认为，应该是立即停止高架路的修建。高架公路用不了多长时间，就会面临更严重的拥堵，更多的人开车，更长时间的拥堵，更大范围的拥堵。
为什么？因为你走的是满足小汽车发展的道路，我可以有一辆车、两辆车，有很多车。当车辆很多的时候，没有哪个城市能够想办法通过多修路的方式来满足充分小汽车的需求，满足不了，到时候堵是必然的。世界范围来看，哪个城市修的环路多、快速路多，那个城市死活也走不出拥堵的怪圈。在高架路方面，韩国欧洲几十年前就已经觉悟了，不再修高架。
高架路是对一个城市的毁灭性打击。让更多的人开车，还想提高公共交通，就没人来坐，对绿色交通是一个伤害。对城市的整个景观，不光视野不好，对两侧的商业、寸土寸金的地方，一个立交就占几百亩的土地，所以国际上已经不鼓励这种发展模式了。
十年前，2003、2004年那个时候，韩国拆掉高架，恢复了河道风貌、景观，现在游人很多
在城市市区，还是不要修高架路。就是已有的高架路已经把我们的河破坏了，我们还要再搞泛岛高架工程，还要穿过山川、河流，你再挖几个洞，槟城还有几个山可以看？空气可以不要再被污染？
随着历史的发展高架路肯定要拆，那我们为什么还要走这个弯路？