If you travel on SW Trenton between Delridge Way and 35th SW, you have probably noticed those new crossing islands installed at 30th SW. It’s part of the West Seattle Neighborhood Greenway, which is on 30th SW between SW Roxbury and SW Kenyon, before moving to 34th SW as it continues north. We’ve received a few questions about the islands – most recently, a reader wondering how emergency vehicles would get around them. We took that question to SDOT’s project spokesperson Adonis Ducksworth, who explained:
Your observer is correct, they will interfere with the turning movements of large vehicles. We designed them knowing that larger vehicles – specifically commercial vehicles – would have to drive over them.
To accommodate such large vehicles, the islands would have had to be designed in a manner that would not have provided as much refuge for pedestrians. So we decided on a compromise: design and locate them as originally intended for pedestrian safety, while making them mountable for the low volume of larger vehicles turning to/from 30th/Trenton. In other words, large trucks can drive over the islands. The curb is only about 4 inches off the ground versus the standard 6 inches.
The Phase 1 design (see the map here) also includes crossing islands at 30th/Thistle and 34th/Morgan.
We asked Ducksworth what’s next in the greenway project, which is in its first phase and eventually will stretch all the way to north West Seattle. He says that “almost all of the speed humps are in” for Phase 1. “We still have to put up the signs and paint the markings. That work will likely happen in the near future in 2019.”