President William Ruto, Nairobi Governor Johnson Sakaja, Transport CS Davis Chirchir during the launch of the Ngong-Naivasha Rd viaduct on June 29, 2026./PCS
President William Ruto and Nairobi Governor Johnson Sakaja on Monday commissioned the Ngong Road–Naivasha Road viaduct, describing the project as a major milestone in transforming the capital's transport network through the National Government–Nairobi County Cooperation Agreement.
The new viaduct is expected to ease traffic congestion along one of Nairobi's busiest transport corridors, significantly reducing travel time and improving mobility for thousands of motorists and commuters.
Speaking during the commissioning, President Ruto said the project is among the flagship developments being implemented under the cooperation agreement between the national and county governments, which has accelerated infrastructure development across Nairobi.
"This is exactly what we meant when we spoke about the Cooperation Agreement—to bring together the two levels of government to fast-track development in the capital city," President Ruto said.
Governor Sakaja welcomed the progress, saying the partnership has unlocked unprecedented investment for Nairobi, including an additional Sh80 billion to fund transformative projects across the city.
"Even as counties receive their equitable share, Nairobi has greatly benefited from the Cooperation Agreement. The additional Sh80 billion is accelerating critical projects, including roads, markets, street lighting, drainage and the regeneration of our city," Sakaja said.
The Governor said Nairobi has already received Sh2 billion specifically to strengthen drainage infrastructure ahead of the anticipated El Niño rains, with works already underway across the city's 85 wards.
"We have received Sh2 billion to address Nairobi's drainage ahead of El Niño. The works are ongoing, and with development now devolved to every ward, it is only a matter of months before we significantly improve our drainage systems, roads and other critical infrastructure," Sakaja said.
"The Sh2 billion will support a comprehensive drainage overhaul that complements the ongoing Nairobi Regeneration Programme. Our goal is to permanently address the flooding challenges that have affected the city for many years," the president said.
"These are developments Nairobi should have received many years ago. Although they have come more than a decade later, I am proud to be the Governor under whose leadership this cooperation agreement is being fully implemented. I thank the President for recognising the need to unlock Nairobi's full potential," Sakaja said.
President Ruto also announced that the flyover near Serena Hotel is on course for completion before December this year.
He added that the ongoing installation and rehabilitation of up to 100,000 street lights across Nairobi will improve security, enhance the city's appearance and stimulate economic activity.
"Through this Cooperation Agreement with Governor Sakaja, we are installing and rehabilitating nearly 100,000 street lights. Nairobi will never be the same again," President Ruto said.
Other flagship projects being implemented under the Sh80 billion Cooperation Agreement include the construction of 20 modern markets, road construction and recarpeting across all 85 wards, the Nairobi River regeneration programme, end-to-end solid waste management reforms, sewer and sanitation upgrades, and expanded public lighting infrastructure aimed at transforming Nairobi into a modern, resilient and globally competitive capital.
