I dislike driving, but I did enough traveling in the American north east to get used to the various interchange styles and downtown driving rules.
It wasn’t until I moved to Portland that I learned how to easily cope with “No Left/Right Turns” in a stress free way.
This sign is near PSU, and there’s another like it on a 405 exit in NW Portland. I’d heard the phrase “Three rights make a left” or “Three lefts make a right” a thousand times before, but it never clicked as a strategy for dealing with one way streets in a downtown environment. This also led me to realize that, by design, every other street is one way downtown.
So Thank You™ anonymous-city-official-with-an-appreciation-for-information-design.