Oregon Legal Research Blog
Green lanes, Blue markings, White stripes, Circles, and Arrows: What’s a driver, pedestrian, bicyclist, and other foot or wheel propelled person to do in order to comply with “experimental” local traffic laws?
Portland, Oregon, is one of a few cities experimenting with Bus-Only lanes, painted bright red. The city’s webpage describing the experiment has lots of useful info including maps with circles and arrows:
“Federal Highway Administration experiment with Red Pavement Markings