This time lapse shows work to connect new on- and off-ramps at South Royal Brougham Way to the SR 99 tunnel. Sections of the ramps was buried underground in 2014 so a construction detour could be built above it to keep SR 99 traffic moving.
More info on Unearthing SR 99 tunnel ramps near Seattle’s stadiums
How much does the SR 99 Tunnel Project cost?
The SR 99 Tunnel Project ... will connect the SR 99 tunnel with a mile-long stretch of new highway near Seattle’s stadiums at the south end of the tunnel and Aurora Avenue North at the north end of ...