The typical right rule of thumb for singapore driving is
For a 3 lanes expressway, lane 1, 90-100..lane 2, 80-90 and
lane 3, 70-80.
For all other normal road lane lane 1 60-70, lane 2, 50-60.
So if you are travelling at 80 on a lane 1 expressway, zhi tong
abit lah, even china zhi Tong bus also can travel at 70 on lane 3,
you sped up or else go join the zhi Tong bus at lane 3.
For normal road, due to traffic light, and lots of obstacle, it
is up to your skill, in fact, if you notice, accident happen more
on expressway than in normal road, because at expressway, the
concentration is less, and those driving long hrs may doze off, as
compare to normal road, you are alway more alert. Alert for traffic
light change, pedestrians, cyclist and chio bus
so i was 70-80km/hr on a normal rd...wrong?