Okay, I thought we were talking about streets in town.
I have zero problem whatever with bike paths that parallel limited-access highways in remote areas where there are no general use roads. When non-motorized transport *can't* use the road, and when vehicles can't turn left or right except at exit ramps that over/underpass the bike route, then that's completely different from what I thought we were talking about. (You don't picture the ramps ... and if the bikes have to share the ramps with cars on the exits then again I think it's extremely dangerous ... but I'm going to assume that if someone went to the trouble and expense to build that, then there are over/underpasses and separate bike entrances to the crossing roads, as well.)
But, those are expensive to build and maintain, and another thing that probably isn't going to happen in the current global economy.
I am a little bit surprised to see the bike route separated only by curbing and "median," without any fencing, in your bottom picture. I'd be less worried about the cars, than I would be about uneducated cyclists trying to cross the road away from the exits.
Last edited by OakLeaf; 11-18-2012 at 08:01 AM.
Speed comes from what you put behind you. - Judi Ketteler