Screen shot.The Washington State Department of Transportation (WSDOT) time-lapse video below shows construction of the northbound SR 99 off-ramp to South Dearborn Street in downtown Seattle, which opened on February 19. This ramp was the final piece needed to create the new SR 99 corridor.
According to King5 News, the ramp is the first in the world to be built using flexible metal and bendable concrete, which will allow it to sway during earthquakes and then return to its original shape.
