They just installed a couple of these in the Pearl district of Portland, OR. I think on paper it's a great idea, but having only a few in your town means you n

They just installed a couple of these in the Pearl district of Portland, OR. I think on paper it's a great idea, but having only a few in your town means you need to educate a lot of people, and don't have much time to do it (e.g. as they are approaching the intersection). They have signs up explaining how they work, but I still see many confused pedestrians.