If you can find an electorate who’d be okay with this you might have a point.
Those cameras would come down in like a month, what few a local government could afford to put up, anyway.
They could do this easily on major highways and yet they haven’t yet, precisely because the local government knows it would be electoral suicide.
A better solution would be pace cars that drive the speed limit with big gates so nobody can go around them. Then people literally can’t speed.