"Netting Off" is the term used to describe how money from fines is collected and given to local authorities for more speed detection devices.

The money is then passed on to the police, who previously were only allowed to use the cash to buy fixed-point equipment.

The police say their intention is to prevent motorists speeding and to reduce accident numbers rather than trap drivers and swell constabulary coffers.

'Cultural shift'

There are currently around 100 fixed-point speed cameras in Devon and Cornwall.

They are all situated at known accident spots.

The police said: "The aim is to increase progress towards a cultural shift against anti-social and dangerous speeds.

"Although enforcement will only target speeds above the legal limit, there will also need to be an influence on inappropriate speeds, especially in rural areas."