Recent floods in Mpumalanga have not created a crisis in the province’s road network, they have exposed systemic weaknesses that have developed over many years. Across the province’s secondary road network, the combined effects of ageing infrastructure, changing freight demands and increasingly intense rainfall are now visible as widespread failures. As consulting engineers who design and maintain both water and road assets across the province, we are seeing clear evidence that this network is no longer aligned with the realities it is expected to serve.

We see this challenge as an opportunity to build a more resilient, future-ready network that will serve our communities, farmers and tourism sector for generations to come.

What We Are Seeing

During heavy summer downpours, runoff volumes and flow velocities have increased beyond the capacities older drainage systems were designed to carry. Floods routinely wash away pavement edges, scour subgrade materials and create sinkholes. These problems are further compounded on our local roads, as they were not engineered for repeated heavy vehicle traffic. This problem is two-fold, with the increasing number of activities in chrome, coal and magnetite mining in the province, as well as the continued failure of the rail networks that were meant to carry these loads. These recurring failures are not isolated incidents; they point to deeper structural and planning shortcomings.

Technical Diagnosis

The root causes are multi-layered:

• Many secondary roads were designed for light rural traffic and lack the structural capacity for sustained heavy haulage.
• Cross-drainage infrastructure is often undersized or degraded, reducing flow capacity and increasing scour risk.
• Inadequate drainage weakens subgrades, leading to loss of support and cracking.
• Preventive maintenance is underfunded, resulting in reactive patching rather than planned rehabilitation.

According to local newspaper Newsday, the situation on local roads has become so severe that privately funded road repairs are needed, even though funds were officially earmarked for maintenance. The national government allocated R1.5-billion through the Provincial Roads Maintenance Grant, and the provincial Department of Public Works, Roads and Transport has a total budget of approximately R6-billion for 2026/27.

These allocations indicate that funding is not the primary constraint. The challenge lies in translating budgets into coordinated, technically sound delivery on the ground.

Technical Solutions That Work

We recommend a two-track response, which includes emergency stabilisation to restore access and a structured rehabilitation programme to rebuild resilience.

Consider, for example, how the deployment of rapid assessment teams to triage priority links using quick-condition surveys and geotechnical spot checks can change how the reoperation of roads are approached. Temporary reinstatements can be made using well-compacted granular overlays and geotextile separation, while the implementation of tactical traffic management to limit heavy axle loads on vulnerable routes can further support the proper rehabilitation of our province’s roads.

This would require pavement upgrades designed for realistic projections of loads, with increased base thickness and improved drainage layers; reconstructed cross-drainage sized to revised hydraulic models accounting for higher-intensity rainfall events and the adoption of asset management systems with condition-based prioritisation and lifecycle-costing.

Governance, Funding and Stakeholder Collaboration

Technical solutions cannot succeed without aligned governance. The engineering community in Mpumalanga is ready to partner, with industry professionals establishing committees to promote collaboration and uphold ethics and professionalism across consulting and client spaces.

At a recent meet-and-greet for members of Consulting Engineers South Africa’s Lowveld branch, which I Chair, concerns such as slow municipal payments were also identified as a significant barrier.

We see tremendous opportunity for integrated planning between the South African National Roads Agency (SANRAL), the provincial department, municipalities and local engineers to optimise freight flows and protect local roads, but it would require more intensive public-private partnerships to combine government resources with industry expertise for strategic upgrades.

Mpumalanga does not lack funding, expertise or intent. What is required now is disciplined execution, stronger alignment between stakeholders and a commitment to designing infrastructure for current and future conditions rather than historical assumptions. If we respond decisively, we have an opportunity not only to restore what has been damaged, but to build a road network that is resilient, fit-for-purpose and capable of supporting the province’s long-term economic growth.