The large-scale telephone outage, which made the ANWB unavailable for half a day on Monday, is over.

Roadside Assistance is again available by phone.

It is not known what caused the failure.

"We have been busy all day helping people with breakdowns who have difficulty reaching us," said a spokesman.

"That will continue tonight."

The ANWB was accessible via WhatsApp during the outage.

"We are very sorry that people have suffered from this," said the spokesman.

"We have done everything we can to help the people."

Among other things, the traffic service deployed extra road guards to track down people with breakdowns who were difficult to reach.