The Passenger Rail Agency of South Africa (PRASA) has committed R11 billion to signalling and telecommunications infrastructure across Durban's rail corridors, alongside a further R2 billion to rehabilitate the uMlazi Corridor, the busiest rail route in KwaZulu-Natal by passenger numbers.

The combined R13 billion programme aims to deliver measurable gains in safety, reliability and service frequency. Once the new signalling is operational, PRASA expects trains to run at intervals of three to five minutes — a headway range that would fundamentally change capacity on the Durban network.

Signalling is the technology that controls and coordinates train movements across the network. Modernising it directly determines how many trains PRASA can run and how safely it can manage them.

Thami Sithole, PRASA's regional manager for KwaZulu-Natal, said the automated system could allow the agency to double the number of trains operating on the network.

"The project is improving how we are able to manage the trains themselves," Sithole said. "So if we are running about 10 trains with the signalling, we can double the number of trains."

That projection remains a target rather than a measured result; PRASA has not yet published operational data showing the headways or fleet deployment the system will deliver once commissioned.

Ridership ambition

The investment arrives at a low base. Annual rail passenger numbers in the region currently stand at 1.8 million, according to eThekwini Mayor Cyril Xaba, who said the improved service could lift that figure to more than 10 million.

Xaba framed the programme as a congestion and mobility measure for the city, arguing that reliable, affordable rail reduces pressure on Durban's roads and changes settlement patterns.

"If you know that you have a reliable train service, it's cheaper, and it's auto-safe, and you stay some 50km away from town, there's no point of you rushing to come and build an informal settlement in town," Xaba said.

"It will also encourage people to sleep at home as well. People move away from their families to the cities for convenience. Now this provides that convenience; you don't have to relocate to the city."

The uMlazi priority

The R2 billion uMlazi Corridor rehabilitation targets the line that carries the largest number of train passengers in KwaZulu-Natal. Its recovery is the operational centrepiece of the wider programme: without the corridor's infrastructure restored, higher train frequencies enabled by the new signalling cannot translate into additional passengers carried.

PRASA is implementing the signalling and telecommunications rollout across various corridors, not a single route, which positions the Durban investment as part of a broader modernisation effort by the agency.

The scale of the ridership target — a more than fivefold increase from 1.8 million to over 10 million annual passengers — sets a demanding benchmark against which delivery of the signalling programme and corridor rehabilitation will be measured in the years ahead.