Inside Ngong Road-Naivasha Road flyover that cost an average of Ksh46,341 per centimetre
By David Nthua, June 30, 2026President William Ruto on Monday, June 30, 2026, officially opened the Ngong Road-Naivasha Road Flyover in Nairobi, revealing that the project cost taxpayers Ksh3.8 billion.
The President described the 820-metre flyover as a major investment aimed at reducing traffic congestion along one of Nairobi’s busiest transport corridors, saying it would improve safety, lower transport costs and cut travel time by up to 60 per cent.
“The opening of the 820-metre Ngong Road-Naivasha Road Flyover, a Ksh3.8 billion investment, is a demonstration of our commitment to decongesting roads and improving mobility in Nairobi County, our capital city,” Ruto said.
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A simple calculation based on the total reported project cost and its 820-metre length shows that the project averaged approximately Ksh46,341 per centimetre of completed infrastructure.
The calculation is derived by dividing the total project cost of KSh3.8 billion by 82,000 centimetres (820 metres), resulting in an average cost of about Ksh46,341 for every centimetre of the project.
The figure represents the average cost based on the total project value and length.
It does not imply that each physical centimetre of concrete alone costs Ksh46,341, as the project cost also covers engineering design, supervision, drainage works, utility relocation, road approaches, lighting, traffic management and other associated construction expenses.
Spanish funding
The project was implemented by the Kenya Urban Roads Authority (KURA) and financed primarily through a Ksh3.58 billion (€25.3 million) concessional loan from the Government of Spain through the Spain Corporate International Fund (FIEM).
Construction was undertaken by Spanish engineering firm Centunion S.A.
According to project details, the works comprised a flyover spanning about 400 metres together with approximately 400 metres of expanded and upgraded adjoining road sections around the busy Junction Mall intersection to ease chronic traffic congestion.
More Nairobi road projects
During the commissioning, Ruto outlined several other transport infrastructure projects underway in the capital.
He said the government is constructing the Ksh3 billion Upper Hill-Kenyatta Avenue Viaduct, which is about 60 per cent complete, alongside the Ksh3.9 billion Talanta Sports City access roads.
The President also announced the upgrading of State House Road through a KSh1.6 billion investment and the planned dualling of the 23.5-kilometre Kiambu Road corridor, a project valued at about Ksh30 billion.
He further said the government is implementing an Intelligent Transport System covering more than 210 signalised junctions across Nairobi at a cost of Ksh45 billion to improve traffic flow through coordinated, real-time management.
Ruto added that the government is also maintaining 729 kilometres of roads across Nairobi as part of a wider programme aimed at modernising the capital’s transport network.
“Our goal is to build infrastructure that delivers a modern, efficient and globally competitive capital city, the gateway to Eastern Africa,” the President said.