supposed to

How are you?

Is there a little difference between (1) and (2)?
which is more used?
which is more natural?

1, When you see a yellow light, you should stop.
2, When you see a yellow light, you are supposed to stop.

[RonBee]

Originally Posted by Unregistered

How are you?

Is there a little difference between (1) and (2)?
which is more used?
which is more natural?

1, When you see a yellow light, you should stop.
2, When you see a yellow light, you are supposed to stop.

I see little difference (if any) between the two.