wrote

Average speed cameras exist to raise revenue for the treasury.

So reduce the fine so that it merely covers the cost of enforcement, but
make it a 6 point offence to clear drivers who have little thought for other
road users off the road more quickly.

A major use of average speed cameras is through roadworks. Workers carrying
out the roadworks are at serious danger from speeding motorists, that's why
average speed cameras are used in these circumstances. The alternative may
be to close a motorway completely while it's being widened, but that
wouldn't be popular.

Ob rail. The need for an adjacent track to be closed while one track is
being worked on, so that, for example, if the Up Fast or Down Slow on the
WCML is being worked on it is sometimes effectively necessary to impose a
4-track blockade.

Peter