Washingtonia because the leaves are supposed to resemble those of Washingtonia robusta, Domus because they're located in proximity to the Tacoma Dome. Above the directional signs you may notice lights which illuminate the undersides of the palm fronds at night which is quite dramatic.
So popular was the first installation just off the 26th street freeway exit that another set was comissioned to be placed on D street even closer to the dome. I like them a little better without the directional signs nailed to the trunks.
I understand that they are extraordinarily drought tolerant, are not fussy at all about soil conditions, are hardy in all zones, and require no pruning at all. Who could ask for a less demanding plant?
Want something on a smaller scale? These beauties are outside of a business called Aqua Quip Pool and Spa in Lakewood. I've had lust in my heart for these for years!