No matter what you do, how high you go, you cannot escape the faint "HAAAAAAA" of the expressway when your windows are open. Even though there is no physical car directly travelling in front of your condo, you can still hear the cars coming from very far away due to the vast openness of the expressway. The sound is different from say, a busy road which will gets quieter in the night.
You will get used to it, but you will need to convince potential buyers in the future.
Fully agree. My dad stays on a high floor at HDB next to clementi swimming pool. His unit faces the estate, not facing the pool/AYE. Relatively quiet.
But when I go to his common corridor and look out to the pool and AYE, can hear all sort of vehicle sound, car, lorry, truck, motorcycle, etc. Not loud, but can hear. And the HDB is not directly next to AYE. Got swimming pool in between.
With upcoming Tuas port, expect more road noise 24x7.
If cannot tahan noise, estate-facing will be better.
Compare to PC, I think PC estate facing units are better as you can see the beach pool and surrounding amenities / greenery.