General Road and Highway Discussion

[tomh009]

I believe the speed cameras in France and England have a very low tolerance beyond the limit,  like <5 kph/mph.  That should be the same here if we went that direction.

Ideally it'd be variable limits based on weather, volume, time, etc... But again, Dumpster Fire is going to be Dumpster Fire.

UK does variable speed limits, based primarily on weather and traffic volumes. When driving on the M25 (world's largest car park, as the locals say …) you really need to pay attention to the changing speed limits, unless your car does it for you. And, yes, the allowable margin is quite small. The infrastructure for the variable speed limits does increase costs, though, at least the way the UK does them.

They additionally do maximum average speed in special cases, such as construction zones.

The right way to do photo radar is the way most of Europe does it, with camera boxes scattered liberally by the roadsides, but only some of them active at any given time. The photo radar vans we had in the distant past were a crutch.