The bridge crosses SR520 diagonally. In the photo below (taken from Microsoft building 43), you can see the bridge’s “wings” — landscaped extensions that provide broad pedestrian walkways.
Leading to the NE 36th Street Bridge from the east side is Redmond’s first roundabout. In general, a roundabout is designed for lower speed traffic, unlike a rotary, which is a larger circle and handles higher speed traffic. Roundabouts are increasingly being used in the United States.
For more info about the project, see the City of Redmond’s NE 36th Street Bridge project page.