Massholes have invented a whole new use for bike lanes: pass-on-the-right lanes. Just something I observe from time to time around here.
This is a good reason why it is, at best, hideously stupid to widen a road for the purpose of installing a bike lane. Drivers don't really care about markings on a road, and will use every inch of pavement they can. There's little to no traffic enforcement. Widening a road for a bike lane is just as dangerous as widening it for a car lane. And in a way, it's subject to a form of the empty lanes attack where the drivers just take advantage of the extra space whenever they feel like it.