Road works speed limits

[Sabantien]

Every day to and from work I drive through quite a long 40 zone (Kingsford Smith Drive for those playing along in Brisbane).

Most people do well above 40 driving through there. I've even seen someone doing over 80 (there are those radars that tell you your speed), and it's normally a 60 zone. (Honestly, if they wanted to revenue raise, perfect spot for it)

Problem is, I have NEVER seen any work being down on the side of the road. I once saw a group of suits in hard hats having a meeting, but that's about it.

I'll admit there could be something happening that I don't see, but how many times do we go through reduced speed limits where there is no one in sight?

Surely if they can whack up radar guns with a digital speed display, they could have variable limit signage for when there's no work going on. I think people going through roadwork after roadwork with nothing happening is why people don't bother to slow down at all for any road work.

I know on the highway sometimes they've physically reduced the width of the lane, but even that could have a sign letting people know what's going on.