Translation - Chinese simplified-English - "这一篇，我想介绍下斯德哥尔摩有趣的公共交通系统。之所以专门写一篇blog介绍这个，有一半是跟偶的工...

In this article I wanted to talk about Stockholm's interesting public transportation system. Half of the reason why I wrote a blog especially about this is because it has to do with my work in Transportation and Artificial Intelligence. The other half is because of my curiosity toward new things. 1) Stoplight crosswalks for pedestrians and bicycles are all equipped with a button to press and a beeping noise to notify pedestrians. Sometimes smaller roads don't have traffic lights, but cars will always yield politely to pedestrians. Actually, Beijing has a similar system but...