Yes, if you want to post a clearly visible easily readable sign: “SPEED LIMIT 80kph, VIOLATORS WILL RECEIVE FINES UP TO $5000 BY MAIL” then that’s fair game. If it’s a camera on a post with no notice and just the normal SPEED LIMIT signs that mean nothing of the sort the world over… that’s like a troll hiding under a bridge shaking down unsuspecting travelers as they pass.
Yes, if you want to post a clearly visible easily readable sign: “SPEED LIMIT 80kph, VIOLATORS WILL RECEIVE FINES UP TO $5000 BY MAIL” then that’s fair game. If it’s a camera on a post with no notice and just the normal SPEED LIMIT signs that mean nothing of the sort the world over… that’s like a troll hiding under a bridge shaking down unsuspecting travelers as they pass.