ow's this for excellent speed control?
这个很棒的车速限制方法如何?

 I don't know about you, but this would slow me down! People slow down and try to “straddle” the hole .....
我不知道你会怎样, 但是我一定会减速! 人们都减速并设法“跨过”这个洞 .....

This is actually a speed control device that is in use. It is much cheaper than speed cameras.
其实这是一种正在使用中的减速装置. 这比测速照相器还便宜很多。

Pretty clever - especially when moved around each day. Isn't art wonderful?
相当聪明 - 特别是每天都移动摆放地点. 这不是很妙吗?