The Gautrain service between Rosebank and Hatfield had a punctuality record of 97.8 percent in its first 50 days, the Bombela Concession Company said on Tuesday.
This was almost three percent higher than that of the London Overground service.
Spokeswoman for the Gautrain's operator, Nano Gasenewe, said the good track record was achieved despite two service disruptions caused by cable theft.
The Sandton-airport link had a punctuality record of 99.6 percent over the same period.
Wednesday would mark the 50th day of the service between Rosebank, in Johannesburg and Hatfield, Pretoria, Gasenewe said; forty million passenger kilometres - equivalent to about 1000 times around the world - had been completed in this period.
The Gautrain had completed 48 000 station-to-station trips on this route and had carried 1.2 million passengers.
Bombela executive Errol Braithwaite said: “Train passengers are currently averaging about 28 000 per day and bus passengers about 9000 per day, both with steady growth.
“We are immensely proud to have consistently achieved service levels comparable to the best systems anywhere in the world.”
He said the company aimed to improve its service and hoped to announce several new initiatives in the near future. - Sapa