[hyuibg]

This isn’t all that new - in fact London’s tram system was using it c100 years ago:

http://1.bp.blogspot.com/-UIyXE_Fv3vA/TkLYU8vbHRI/AAAAAAAALb...

[TheForumTroll]

Try taking that off the rails and go shopping and see how it works. No comparable at all.