I'd always thought the sign at the intersection with Ayres Rd. said "Hwy" ... Google Maps does use both road and highway on that stretch. I've never used it to access Mckenzie View Drive. I go east on Green Acres/Crescent.

If I'm on the bike lane/shoulder where there's a median in the road, I do get a little on edge about a big truck squeezing between me and the median at 45 mph. So I say pull out the medians and maybe reduce the speed to 35. Otherwise I really have no worries, except for the elevated southbound bike lane just south of Ayres and the elevated lanes on Ayres and even a portion of Gilham.