The Kenya National Highways Authority (KeNHA) has confirmed that motorists will pay a base toll rate of Ksh 8 per kilometre to use the upgraded Rironi–Mau Summit Highway. The project is a vital multi-billion shilling transport artery designed to eliminate traffic gridlocks between Nairobi, Nakuru, and western Kenya.
Key Project DetailsEstimated Cost: The project is projected to cost around Ksh 180 billion to Ksh 200 billion.Project Operators: The highway is handled by a consortium of the China Road and Bridge Corporation (CRBC) and the National Social Security Fund (NSSF).Concession Period: The corridor will operate as a toll road for a 30-year period under a Public-Private Partnership (PPP) model.Tolling Mechanism: An open tolling layout with eight distinct toll stations means drivers only pay for the specific distance they travel.
Expected Trip CostsThe Ksh 8 base fee specifically applies to passenger cars and small 4WD vehicles, while trucks and buses will be billed on a separate tier. Based on the current distance calculations, estimated costs include:Route StretchApproximate DistanceEstimated One-Way Toll CostRironi to Naivasha58 kmKsh 464Nairobi to Nakuru~139 kmKsh 1,112Full Stretch (Rironi to Mau Summit)175 kmKsh 1,400Price Escalation and ExemptionsAnnual Hikes: To shield investors from inflation and foreign exchange rate fluctuations, toll rates will escalate by 1% annually.
Exempt Vehicles: The PPP Directorate has structured absolute exemptions or reduced rates for ambulances, military vehicles, police vehicles, and localized traffic for residents living directly along the corridor.Alternative Options: Following public pushback over double-taxation fears, KeNHA confirmed that free alternative public routes will remain maintained for motorists who opt out of using the expressway.
