In an attempt to make all drivers in the county aware of the new regulations, Gloucestershire CC are placing large signs on major roads reminding drivers that they should not use their mobile phone when driving.
From 1 December, signs will be displayed at major road junctions in the county that experience a heavy flow of traffic.
Sergeant John Pickersgill, of Gloucestershire Constabulary's motorway policing unit, said: 'We have long recognised the dangers associated with using hand held mobile phones while driving and have until now been issuing fixed penalty tickets to people not in proper control of their vehicles due to the use of phones.
'However, the new legislation creates a specific offence of driving while using a hand held mobile phone and this will obviously give us greater grounds to take action and clamp down on this dangerous practice. We will be vigorously enforcing the new law when it takes effect.
'We will also continue to issue fixed penalty tickets to those not in control of their vehicles due to the use of hands free mobile phones or other devices.'