From About Travel:
http://weirdandamazingtravel.about.com/od/Weird-and-Amazing-Transportation/tp/10-Cities-You-Wouldnt-Expect-to-Be-Expensive-But-Are.htm?utm_content=7268481&utm_medium=email&utm_source=cn_nl&utm_campaign=travelgetsl&utm_term=
Article includes outdated info about the "blue" rate.
http://weirdandamazingtravel.about.com/od/Weird-and-Amazing-Transportation/tp/10-Cities-You-Wouldnt-Expect-to-Be-Expensive-But-Are.htm?utm_content=7268481&utm_medium=email&utm_source=cn_nl&utm_campaign=travelgetsl&utm_term=
Article includes outdated info about the "blue" rate.