Giving a little more thought to the signal timing in the Urban Street Design Guide brings me back to a post I created three years ago. The post on Quarter Cycle Offsets is currently the most popular on my blog. It is a little surprising to me because that is a very wonky thing to read about and difficult to understand. Quarter cycle offsets works in Portland because of the short block spacing and the resulting short cycle length. Given those two constraints, what does it look like. Well of course, there's a video for that here:
Portland SW 6th Green Wave Signal Timing from Peter Koonce on Vimeo.
It's not just 6th, but 4th as well.