ok as u said.
this is what i see.
1. Road is floating (just like 1990 NS highway northern part).
2. Poor interchange Design.
3. Worst U-turn system.
4. Super narrow U-turn.

Which kind of alternative you referring to? Digging tunnel through the hill or use a plane to fly over the hill?

Not sure whether you are frequent "hill road" (from relau to paya terubong) user, but if you do, you should notice whenever there are a bus/truck slowly going uphill, people will need to risk their life to overtake or just follow it behind slowly with 20 or 30km/h, and then a minor accident there will leads to standstill traffic for hours... its even more fuck up if its a rainy day.

this road is good for dispersing the traffic there, else you have to take a big turn through jalan bukit gambir > greenlane >ayer itam > paya terubong (insanely big turn) when shit happen which occurs like almost every week.

If you ask who want it? im one of it. Dont be selfish, just because you didnt need it, then you assume everyone wont be using it?