Rironi- Mau Summit Road

06/07/2026

Twende Nakuru

25/06/2026

Key benefits of upgrading Rironi - Mau Summit Road infrastructure:

- Reduced traffic congestion
- Improved road safety
- Lower transport costs
- Boost to trade and regional integration
- Support for farmers
- Job creation
- Economic growth and investment
- Improved access to services

26/05/2026

28/11/2025

The 94km Gilgil-Mau Summit road, the second section of the Western Corridor passing through the heart of Nakuru City, will be upgraded into a modern dual six-lane carriageway, ensuring smoother traffic flow and enhanced safety.

In Nakuru City, the project will incorporate a 3.34km dual four-lane viaduct to ease urban congestion as well as a 900 metres retaining-wall to stabilise the road and safeguard the nearby infrastructure.

Construction of this section will be undertaken by Shandong Hi-Speed Road and Bridge International Engineering Company Ltd at a cost of $678 million (KSh88 billion), with works scheduled for completion within two years.

28/11/2025

The Nairobi–Mau Summit upgrade has officially begun, covering 81km from Rironi to Gilgil and 58km on the Rironi–Maai Mahiu–Naivasha stretch.

The Rironi–Naivasha is being expanded into a dual four-lane highway, while Naivasha–Gilgil becomes a dual six-lane corridor to ease traffic and improve movement of goods.

The 139km project will be completed in two years at a cost of KSh112 billion by the CRBC–NSSF consortium.

28/11/2025