Here is the link to an interesting article I read this morning.
One part that came as no surprise: “A 2009 literature review of traffic safety studies looked at bicycle crashes and discovered that multi-use paths are more dangerous to ride on than even major roads.”
Though I am not sure that launching on a vast infrastructure building campaign around bicycle superhighways is the way to go…especially as once they are built, some will want to make them toll bikeways – no doubt.
It seems to me that re-paving and re-striping roads to include space for bicycles is a more efficient way to go.