The Kenya National Highways Authority has expressed confidence in the progress of the expansion of the Rironi-Nakuru-Mau Summit Highway after an assessment conducted on Friday, July 10.

🇰🇪 Breaking It Down

The KeHNA Board of Directors, led by the Chairman, Winfrida Ngumi, inspected the construction works that began in November 2025 and received updates on the design and construction.

According to the Authority, the assessment focused on the ‘priority sections of the corridor’ of the 233-kilometre road.

Under the current construction plan, the two construction companies running the project began work at different ends in a dual-front strategy.

📌 What You Need to Know

This came about after the mapping of the highway, which identified and isolated specific priority sections based on traffic congestion bottlenecks. These sections are being built simultaneously.

Because the initial bottleneck starts right where the Nairobi Expressway and the Southern Bypass traffic meet the existing double-lane highway, the contractors opted to aggressively prioritise the initial take-off points.

The China Road and Bridge Corporation (CRBC) has prioritised the first 5-kilometer stretch starting at Rironi around the Kamandura area to expand it into the planned 4-lane dual carriageway.

The other high-priority section is the 58-kilometre escarpment, the Rironi-Mai Mahiu-Naivasha route.

Heavy earthworks, hillside cutting, and the installation of gabion and retaining walls are being fast-tracked here.

Documents reviewed by Kenyans.co.ke indicate that the immediate focus is on adding dedicated climbing lanes on the steep inclines to separate slow-moving heavy trucks from passenger vehicles.

📰 Source: Kenyans.co.ke