Nonexistent. There's one road that I go on perhaps 3 or 4 times a year that has a bike lane. Mostly I'm riding on 50+ MPH roads with either an 18" or zero shoulder, one lane each direction.
There are entire counties around this area that don't have a single foot of bike lane.
Within towns with 30MPH or less speed limits, honestly I'd rather not have a bike lane.
__________________
Work: the 8 hours that separates bike rides.