Two men were arrested for speeding on Saturday, Gauteng traffic police said.
A 35-year-old motorcyclist was arrested for travelling at 205km/h on his blue Suzuki Hayabusa on the R21 near the R25 off-ramp, spokesperson Busaphi Nxumalu said in a statement.
"He claimed he thought the high performance vehicle of the high speed unit wanted to challenge him," said Nxumalu.
"According to the officer, the driver did not even realise that they were following him. He only noticed the vehicle when they activated their blue lights and siren."
In a another incident, a 34-year-old engineer was arrested for driving at 201km/h in his brand new Porsche Carrera.
The man attempted to evade the police but was forced to stop near the N1 highway.
Both men were taken to the Olifantsfontein police station where they were charged with reckless driving and speeding.
The motorcyclist was released on R1500 bail, while the second man would be released later.
Both men were expected to appear in the Tembisa Magistrate's Court soon.
A total of 24 motorists have been arrested so far this weekend by Gauteng traffic police, said Nxumalu.