The WebUrbanist report on this long rainbow underpass in Zhengzhou, China which has been designed to help drivers’ eyes adjust from daylight to an artificial lighting and then back again.
![](https://www.reloade.com/wp-content/uploads/2015/01/Rainbow-Tunnel-1-900x599.jpg)
The WebUrbanist report on this long rainbow underpass in Zhengzhou, China which has been designed to help drivers’ eyes adjust from daylight to an artificial lighting and then back again.