Thames Valley Police officers carried out a road safety check at Junction 14 of the M1 at Newport Pagnell on Thursday finding three to be overweight.
Officers from the Joint Roads Policing Unit based at Milton Keynes weighed heavy goods vehicles between 8am and 11am.
Out of the 15 goods vehicles checked three were found to be overweight.
One driver whose vehicle was 17 percent overweight was issued with a £200 on-the-spot fine and another was fined £60. Both fines were issued under the new graduated fixed penalty system, where the more serious the offence the higher the fine. It has to be paid on the spot to release the driver and the vehicle.
One driver was given a verbal caution for being 3.7 per cent overweight.
All the drivers had to either remove loads from their vehicles or adjust them to ensure that no one axle was overloaded and that the vehicles were safe.
One driver was issued with a £60 standard fixed penalty for not wearing a seatbelt.
Sergeant Simon Hills, of the Joint Roads Policing Unit based at Milton Keynes, said: “Thames Valley Police would like to remind drivers that driving an overweight vehicle presents a danger to other road users, as they can become unstable under steering or harsh braking and may have a longer stopping distance in an emergency situation.
“Officers will continue to target drivers who drive with overloaded vehicles or in an unsafe manner.”