London does it. http://abstracts.aetransport.org/paper/index/id/2041/confid/10 http://abstracts.aetransport.org/paper/index/id/2041/confid/... https://www.youtu

London does it. http://abstracts.aetransport.org/paper/index/id/2041/confid/10 http://abstracts.aetransport.org/paper/index/id/2041/confid/... https://www.youtube.com/watch?v=w4oeMB0tYII https://www.youtube.com/watch?v=w4oeMB0tYII The video is a bit cheesy, but it gets the point across.