Traffic noise is invasive and effects people differently. It's pretty hard to find quiet in Sg, but overlooking the ECP definitely is up with the noisier options. If you think it will be a problem look elsewhere.
Not that
condo but had friends who lived nearby. The ECP is noisy, all the time. They got used to it but never enjoyed it, since moved. Think they were on the 13th floor.
Can no longer remember the details but an engineer once explained that traffic noise is louder at different heights. Certain low floors were desirable and then some higher ones. He has just moved out of a level 2 unit which he bought on this principal. So it would be worthwhile looking at different floors, the sound level may vary, but it will always be there.