Works on the Rironi–Mau Summit Road are progressing steadily, keeping the project on course for delivery within the committed timeline.Works on the Rironi–Mau Summit Road are progressing steadily, keeping the project on course for delivery within the committed timeline.

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1). The Sh200 billion Rironi–Mau Summit Road is an ongoing 233-kilometre infrastructure upgrade designed to dual and expand the vital transport artery connecting Nairobi, the commercial and political capital, to Western Kenya

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2). The project spans from Rironi in Kiambu County through Naivasha and Nakuru, ending at Mau Summit

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The Rironi–Mau Summit Road includes the Nairobi-Nakuru-Mau Summit (A8) and Nairobi-Maai Mahiu-Naivasha (A8 South) sections3). It includes the Nairobi-Nakuru-Mau Summit (A8) and Nairobi-Maai Mahiu-Naivasha (A8 South) sections
4). It is part of the Northern Corridor, carrying nearly 40% of Kenya’s trade traffic and linking the Port of Mombasa to Uganda, Rwanda and Congo-Kinshasa

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5). The project is expected to cost about Sh200 billion under a 35-year framework
6). The road was launched by President William Ruto on November 28, 2025

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7). The project includes solar-powered operations, expanded lanes (up to three lanes in congested zones like Naivasha-Nakuru) and a tree-planting initiative
8. The Department of Roads says the project is slated for completion by June 2027.
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