KeNHA Confirms Toll Fees for Rironi-Mau Summit Highway

The Kenya National Highways Authority (KeNHA) has announced that motorists using the Rironi-Mau Summit highway will pay a toll fee of Ksh8 per kilometre once the road becomes operational.

According to a project disclosure notice, the 139-kilometre highway will operate as a toll road for 30 years under the current Public-Private Partnership (PPP) arrangement. Motorists travelling the full stretch between Nairobi and Nakuru would pay roughly Ksh1,112 per trip based on the current tariff.

The toll will apply to both the Rironi-Naivasha-Gilgil and Rironi-Mai Mahiu-Naivasha routes, subject to future adjustments and regulatory approval. KeNHA stated that any changes to the Ksh8 tariff would follow the terms of the project agreement and require government and regulatory sign-off.

All project assets will revert to KeNHA once the 30-year concession period ends, the authority confirmed, with the handover to follow agreed performance standards at that point.

The project is being delivered by China Road and Bridge Corporation (CRBC) and the National Social Security Fund (NSSF), selected as preferred partners through a PPP evaluation process. The PPP Committee approved the project and its financial risk assessment in November 2025, clearing the way for the project agreement to be signed and road expansion works to begin.

The Ksh200 billion highway expansion includes the construction of interchanges, bridges, drainage systems, tolling infrastructure, and road safety facilities along the corridor.

KeNHA said the completed highway is expected to improve traffic flow, cut travel times, and lower vehicle operating costs for motorists moving between Nairobi and the wider Rift Valley region. The authority also pointed to anticipated gains in local trade, tourism, and investment in towns along the route, alongside job creation during both construction and eventual operation of the road.

Treasury Principal Secretary Dr Chris Kiptoo inspected progress on the Mau-Rironi Summit works on May 27, as the project continues toward its targeted completion in April 2027.