Former Cosatu general secretary Zwelinzima Vavi and EFF leader Julius Malema are plotting to overthr.
"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," spokeswoman Busaphi Nxumalo said.
The man was charged with defeating the ends of justice.
He is expected to appear in the Heidelberg Magistrate's Court today.