More than a third of drivers were found to be behind the wheel while under the influence of drugs, according to new figures released by police.
A total of 225 roadside tests were conducted across Norfolk and Suffolk during a month-long campaign, led by the Department for Transport, during March.
Of those, 80 tests proved positive, with 144 negative. One person refused to provide a sample.
The testing equipment is used on motorists thought to be under the influence of either cannabis or cocaine. It is an offence to be behind the wheel in excess of legal limits of those drugs and several others, even if you are not unfit to drive.
The legislation, which came into force last year, also covers a number of prescription medicines.
Chief inspector Kristin Barnard, head of Norfolk and Suffolk’s combined roads policing unit, said: “The message is clear and simple - police are using the roadside kits which means that if you drug drive you’re more likely to be caught and convicted.
“I hope campaigns like this increase awareness of the fact that drug driving is not acceptable and you will be held accountable for your actions.”