A man was arrested after he was found in possession of a speed-jamming machine along the N3 in Heidelberg, Gauteng traffic police said on Sunday.
"He was stopped on Saturday after the speed machine used by traffic officials failed to detect the speed he was travelling in. The equipment was found in the car," said spokesperson Busaphi Nxumalo.
Nxumalo said the equipment prevented the detection of the speed at which a vehicle was travelling.
The man was charged with defeating the ends of justice.
He is expected to appear in the Heidelberg Magistrate's Court on Monday.