lol, kinda agreed with most ppl here, SG traffic law is really weird, u can see from here that lorry suddenly have to stop in the middle of a junction, whereby ideally it should be green. i also hate driving in SG, seriously the traffic lights law is damn confusing and unnatural.

This is incorrect. Red light means stop, for right turning vehicles.
You probably konfius it with "no green arrow also can turn".

For right turn, red means cannot turn at all lah. Refer to the link you gave. I reproduce for your convenience. Sendiri post link, sendiri tak baca

Red light means cannot turn right. Don't listen to those ignorant people here who create own rules.
Discretionary right turn means the round green light is on (traffic going straight can move) but green right arrow is not on yet. If no oncoming car or adjacent got no pedestrians, you can turn right.

The advantage of this system is it allows traffic from both directions to move, only those turning right must practise discretionary turn or wait for green arrow.

When green arrow is not on and the round red light is on, both traffic going straight and turning right must stop.
In example below, you can only turn right when green arrow is on, because the round red is on. When the green arrow is off (no red arrow here) and red light is on, you must not turn.

Wrong.

U can never turn right on red. Never was.

Discretionary right turn is when U can turn right on green w/o arrow, but have to watch out for ongoing vehicle.

Just added two years ago? Wrong again. Again, red means stop. Your own link already proved you wrong.

You grew up in Sin and yet you don't know the traffic rules? Not surprising if you don't have a licence or you don't drive.

If you have other proof of "red can turn right", or the so-called change 2 years ago, please share. Else, we'll just stop here.
Exactly.