For discussion purposes (not for legal ramifications) there is also the consideration of how you left the sidewalk to get on x-walk. If you were stopped still waiting for walk signal and started out slowly (but on bike) - that is how pedestians do it and, legal or not, if done on a bike the car should have seen you and stopped. But if you were riding along at 15mph on the sidewalk and entered the x-walk at speed just as the walk signal came on then even an alert car driver may not see you.

I almost hit another cyclist when I was on my bike making a right turn - I was riding along at 24mph on main road, slowed a bit and made a right turn into a side street and nearly whacked a sidewalk cyclist who was riding parallel to the road on the sidewalk which is offset by ~6ft with some bushes, etc. between sidewalk so I didn't even see the other cyclist as I was looking at the road ahead of me and if any peds were preparing to cross x-walk, but not the sidewalk 20ft before intersection.

Al