Originally Posted by CrankyOne

It makes little difference either way. We began converting to the "may use full lane" signs several years ago. We've a bunch of them where I ride and there's very minimal difference in driver behavior. Maybe instead of getting buzzed once every 100 miles it's now every 125 miles.

The reality is that someone with a xxxhp car that can get up to speed quickly and can easily go 100 mph doesn't like constantly being slowed and delayed by someone doing 15 in a 45. And perhaps especially when they see similarly dressed people blowing stop signs and red lights fairly frequently. No matter that the person delaying them may be the most law abiding rider out there, drivers still lump all MAPILs together, especially when they're irritated with being delayed again and again and again.

No country that I'm aware of has been successful with bicycles and motor vehicles sharing the road.