I don't think the idea is awful in itself (the Dutch do it very well in many places) - it's just that this example is terribly designed - mostly because there isn't enough space here to do it safely, and keep two-way working. To be fair to the people involved, I think in the original design, the road was to be made one way, and the track would have been wider and better-engineered - but politics got the better of engineering.
I don't think the idea is awful in itself (the Dutch do it very well in many places) - it's just that this example is terribly designed - mostly because there isn't enough space here to do it safely, and keep two-way working. To be fair to the people involved, I think in the original design, the road was to be made one way, and the track would have been wider and better-engineered - but politics got the better of engineering.