I had occasion to go out to the Columbia River Crossing project open house today (look for a full post shortly). It was held at Jantzen Beach and I opted to use my bike, assisted by the Yellow Line.
After reaching the Expo Center I was absolutely dumbfounded as to how to get from there to the bike lane over the Columbia Slough bridge. Fortunately another cyclist was able to point me in the right direction, but even then I made a wrong turn and had to retrace my steps.
This is clearly an area that could benefit from much better signage!