Road rules need to be policed

I HAVE three lots of roadwork, one significant, on my route to and from work.
This means slowing to 60 and 40 kilometres per hour on two and 80km/h on the other. I welcome the work, but the speed limits could be managed more closely.
Once or twice a week I have someone behind me obviously impatient because I drive at the 40km/h limit, particularly on the loop around the Pakenham Bypass work on the Kooweerup Road.
The police regularly sit on one of the other work sites and have handed out enough tickets to earn their wages for a year. I seem to get speeding tickets easily enough without asking for them so I stick to the restrictive limit and put up with the tailgaters.
But, it seems strange to have a 40km/h limit on some sections when no workers are around; perhaps at those times 60km/h would be more reasonable.
A police car went through the Pakenham Bypass loop at 60km/h at 8.55am last Friday, indicating that the 40km/h limit may be too low, at least by that police driver’s assessment.
On the other hand, a car went off that loop during the previous night and finished on its roof.
My view is that if regulations say these sections must be as low as 40km/h, even when workers are off duty, then let the police set an example and stick to the rule.