The Smarter Highways website has an animation to show how the system will work. Here’s a longer video about the system. According to the video, systems such as this have been used in Europe with success, reducing traffic-related collisions by 30%.
The ramp from South Columbian Way to the West Seattle Bridge, and the westbound, right hand lane on the South Spokane Street Viaduct from I-5 to Harbor Avenue Southwest will be closed on Sunday, March 7, from 8:00 am to 4:30 pm to allow crews to clean drains for the Spokane Street Viaduct widening project. Plan accordingly.