Batemans Bay police say at about 2pm on Friday, June 22, highway patrol police stopped a white Toyota sedan on the Princes Highway, Cullendulla.
Police say they stopped the vehicle for a roadside drug and alcohol test, and that both tests were negative.
Police say they then searched the vehicle,and found a quantity of alleged cannabis in the engine bay.
The 48-year-old male driver was arrested and charged at Batemans Bay Police Station with posses prohibited drug. He is to appear at Batemans Bay Local Court.