Actually this is one of only about three lanes that cross the county east-to-west without disappearing into a maze of cul-de-sacs. As such, it has had a bike lane from one end to the other (with the exception of the 100-feet or so at the traffic island pictured above) for many years.

I've been talking to a county traffic engineer and it sounds like the new striping is part of a program to standardize county-wide on the handling of traffic configurations like the one pictured here. Apparently, this is now one of five intersections in the county handled in this same way (though I contend its the only one with heavy traffic on both cross streets). The new striping is the recommended best practice in the Oregon DOT Traffic Manual.

The traffic engineer who has been helping me suggested that if I don't feel like I can safely cross over to the left-side bike lane then I can basically disregard the lane striping and stay in the position of the curb tight bike lane until I get to the sidewalk cut-out that lets me wait until I can safely cross the right turn lane. That seems like a fairly reasonable solution. It essentially amounts to taking the lane in the turning lane. I suppose I could even stay in the turning lane and go straight onto the paved opening in traffic island since there's only one turning lane now and I wouldn't need to worry about anyone going around me on the left.