Having just visited beautiful Zion and having driven on this road in Oct 2008, it was easy to see that the road has been repaired and patched a lot and needs to be re-surfaced. But I think the switch backs and steep grades should remain. I drove a small RV, a pick-up truck camper, and didn't have any problems. The switch backs and steep grades add to the character of the place. Maybe the road needs more "turn outs". The large and long RVs have no business being on this road anyway because of the tunnel. The red road surface does add to the character of the park, but if it costs significantly more to resurface the road "red", then it may not be worth keeping the "red". The money may be better spent making the road surface more durable. I suspect that the federal government budgets for national parks is going to get very tight so every dollar needs to be spent carefully.