You don't even have to know what the actual pattern looks like, just mention "airport" and "carpet" in the same sentence and PDX comes to mind
You got it, I guess they are pretty well known for that these days as almost everyone else has moved away from carpet at airports.
Well that and only in Portland can you find people who care about their airport's carpet in the first place
Heading on a road trip tomorrow. An old friend to help me remember the date, and measure elapsed time.