Meet Seattle'a traffic engineer: https://twitter.com/dongho_chang https://twitter.com/dongho_chang Scroll through his Twitter a bit and you'll probably find h

Meet Seattle'a traffic engineer: https://twitter.com/dongho_chang https://twitter.com/dongho_chang Scroll through his Twitter a bit and you'll probably find him taking pictures of interesting things and possible safety concerns he encounters as he bikes through his own city.