I see this all the time in SF: the car is turning right without being in the correct lane; the driver should be in bike lane (and partially still in the rightmost traffic lane) and should be signalling right, to indicate a turn. Inevitably, the driver isn't.
As a biker, if I see a vehicle properly executing a right turn, I will of course either not pass the vehicle, or pass on the vehicle left in the space left in the traffic lane by the fact that the vehicle has moved in the bike lane, thereby not conflicting with the driver's right turn. But I have to know the driver is about to turn, and so many drivers just give no signal.
As a biker, if I see a vehicle properly executing a right turn, I will of course either not pass the vehicle, or pass on the vehicle left in the space left in the traffic lane by the fact that the vehicle has moved in the bike lane, thereby not conflicting with the driver's right turn. But I have to know the driver is about to turn, and so many drivers just give no signal.