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Re:California port truckers ‘drowning’ in supply chain ineff... by mjevans on Friday November 26, 2021 @09:02PM (#29356526)
The light rail is _mostly_ not grade separated.

Within the densest part of Seattle they took over the underground tunnels which for years had been used as (electric) bus transit only tunnels with light rail.

Past the stadium in the south it's at grade.

After a brief tunnel under the major hill it is at grade through the gentrifying area south of Seattle.

It goes above grade near the airport.

There are expansions to the east and north that I haven't seen yet, and the expansion to the south hasn't yet reached a stage where I've seen sufficient details to answer.

Re:California port truckers ‘drowning’ in supply chain ineff... by lightrail123 on Friday November 26, 2021 @10:37PM (#29357147)
You are factually incorrect here.

It's grade separated pretty much all the way north to Northgate and beyond. (Which opened this year.) Northgate, Roosevelt, U District, UW, capitol Hill, all the downtown stops are all separated in tunnels/elevated rail.

It's at grade only in parts of SODO and South Seattle. The bulk is separated. Even when not, it takes priority at crossings and has it's own lanes that are rarely shared with cars.