I-5 bridge direction
Yeah, sounds like there is some feeling out there for sticking with NB and SB rights of way. However, it seems like 80% of people use the SB exclusively, since the connectivity from the NB is funky.
I was indoctrinated by another to use SB exclusively, but will get out my cycling map and try NB when heading north.
Signs will probably not steer people to the other side, but may make wrong-way riders (like me) feel sheepish enough that we will yield to the law-abiding riders.