The National Intervention Unit is relying on hired vehicles, which are not equipped to deal with traffic officers' duties, according to a report on Tuesday.
The Star reported that the Road Traffic Management Corporation (RTMC) hired 40 cars last month to enable the unit to perform its duties and increase visibility.
RTMC spokesperson Ashref Ismail said that half, at R235 per car per day, were sponsored by Avis.
Unnamed sources told the newspaper that the vehicles were not fitted with required equipment such as sirens, numberplate recognition devices and communication radios.
Justice Project SA spokesperson Howard Dembovsky said that traffic officers needed blue lights and sirens to legally break traffic laws in the line of duty.
"You can't disregard the traffic laws and road signs... if you are using a vehicle that is not marked properly."
The National Intervention Unit is tasked with co-ordinating law enforcement on the country's roads and was created to bring down road deaths and crack down on drunken driving, reported The Star.