[entuno]

I've also seen roads that have these kind of signs, but they only apply during busy hours.

However, as with any traffic controls they're useless if they're not actually enforced. Which is a shame, because it'd be absolutely trivial to automate that detection with cameras.

[Tade0]

Let dashcam footage be used as evidence of traffic violations and behold how quick will drivers themselves be to send every such piece of footage to the police.