Three people were arrested and cocaine was seized from a vehicle during a police crackdown in Ipswich last week.
The operation took place on Wednesday, March 27, with a focus on organised crime groups who commit offences across county borders while using the road network.
Officers were poised to bring in vehicles identified as being potentially involved in criminality or committing offences.
This involved bringing a vehicle into a check site at the Tesco truck stop, near to the Copdock Interchange, where police and partner agencies conducted checks of the vehicles and occupants.
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Officers also stopped anyone suspected of committing any of the fatal four offences, along with people driving vehicles which were unroadworthy or had a defect.
One person was arrested on suspicion of intent to supply and two were arrested on suspicion of drug-driving, one of whom was also arrested on suspicion of possession of Class A drugs and driving while disqualified.
40 vehicles were escorted back to the site, with only six leaving clear of any offence and five vehicles were seized.
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49 Traffic Offence Reports were issued including 12 for having an insecure load, 11 for tinted windows, five for no insurance, four for carriage of dangerous goods, four for no MOT, two for using a mobile phone, and two for not wearing a seatbelt.
Sergeant Richard Starkey said: "These days of action provide us with a great opportunity to detect vehicles with defects and remove unsafe vehicles from the roads, while also enforcing the Fatal Four main causes of fatal or serious collisions.
"The number of offending drivers or vehicles with defects was considerably lower than we have detected working from this location previously, which I hope is a sign that the messages of our regular road safety campaigns and days of action are beginning to get through to people."
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