Drivers who use their mobile phones without a hands free kit are being targeted by police in south Wales.
Police will clamp down on drivers using hand held mobile phones
South Wales Police said many motorists are still flouting the law which bans people from using a mobile phone while behind the wheel.
Anyone caught using their phone while driving faces a fine of up to £1,000. But courts do not have the power to impose penalty points.
Using a hand held mobile phone while driving has been illegal since 2003.
But despite the hefty fines, the offence is non-endorsable, so no points can be added to a motorist's licence.
Many drivers now use hand free kits to make calls while on the move, but under existing legislation, they can be prosecuted if it is proved that they are not in proper control of their vehicle.
Despite several operations to clamp down on the dangerous use of phones, South Wales Police say that many motorists continue to ignore the law.
Road Safety Officer Sergeant Nigel Whitehouse is heading an operation which launches on Monday to target such drivers.
He said: "We have already prosecuted a number of drivers since the legislation was introduced as their driving actions fell well below the standard required.
"This is a warning to all motorists who travel through the south Wales area, that we will not tolerate such actions where other people's lives are endangered.
"We wish to reiterate the dangers of driving whilst using mobile phones and urge drivers to comply with the law.
"The practice of using phones whilst driving not only endangers the driver but innocent road users as well," he added.