The government has approved the dualling of the 23.5-kilometre Muthaiga–Kiambu–Ndumberi road, a critical transport corridor linking Nairobi and Kiambu counties. The project is expected to ease chronic traffic congestion, enhance mobility, and boost trade and real estate development across the northern Nairobi metropolitan area.
The Cabinet’s decision, announced on November 11, 2025, marks a major investment in urban infrastructure modernization under the Kenya Vision 2030 and the government’s broader plan to upgrade the Nairobi Metropolitan Transport Network.
The road expansion will transform the existing two-lane highway into a dual carriageway complete with bypasses, loops, and access roads designed to increase vehicle capacity, reduce travel times, and improve road safety.
Unlocking the Nairobi–Kiambu Corridor
The Muthaiga–Kiambu–Ndumberi corridor is one of Kenya’s busiest suburban routes, serving major residential, commercial, and institutional hubs including Muthaiga, Runda, Ridgeways, Kiambu Town, and Ndumberi.
Traffic volumes along the corridor have grown exponentially due to rapid urbanization and population growth in Kiambu County — one of Kenya’s fastest-growing peri-urban zones — which has increasingly become a residential and economic extension of Nairobi.
During peak hours, motorists routinely face long traffic jams stretching several kilometres between Ridgeways and Kiambu Town, causing massive time and productivity losses.
Transport experts have long identified the corridor as a bottleneck constraining regional economic efficiency and quality of life.
“The congestion along this stretch undermines business competitiveness and raises the cost of logistics,” said Eng. Charles Karanja, a transport infrastructure consultant. “Upgrading it to a dual carriageway will unlock significant productivity gains for both counties.”
Project Scope and Features
The proposed project will expand the existing two-lane road into a modern dual carriageway, featuring:
- Bypasses and loops to divert through-traffic and improve flow;
- Service lanes and access roads for local users and businesses;
- Non-Motorised Transport (NMT) facilities including walkways and cycling lanes to enhance safety and promote sustainable mobility; and
- Modern commuter facilities such as designated bus bays, pedestrian crossings, and lighting to improve accessibility and security.
The dualling will also include drainage works, street lighting, signage, and landscaping, ensuring compliance with environmental and urban planning standards.
Cabinet sources indicated that the project will be implemented through a public infrastructure financing model, potentially leveraging partnerships with private contractors and development financiers.
A Strategic Link in the Metropolitan Transport Network
The Muthaiga–Kiambu–Ndumberi upgrade is part of a larger government strategy to decongest Nairobi and strengthen its transport integration with satellite towns such as Thika, Limuru, and Ruaka.
It complements ongoing works on the Ruiru–Githunguri–Uplands Road, Nairobi Expressway expansion, and Waiyaki Way–Redhill link, all aimed at improving traffic distribution within the metropolitan region.
According to the State Department for Roads, the corridor will serve as a key feeder to major routes including the Northern Bypass, Thika Superhighway, and Ndumberi–Tigoni link, creating a seamless road network that supports commuter, freight, and tourism traffic.
“This expansion will transform Kiambu into a more accessible economic hub,” said Transport PS Mohamed Daghar. “It supports industrial growth, urban development, and housing expansion along the Nairobi–Kiambu belt.”
Catalysing Real Estate and Local Commerce
Beyond traffic relief, the dualling is expected to catalyse major real estate, retail, and logistics investments in the Nairobi–Kiambu corridor.
Kiambu’s proximity to the capital, availability of land, and growing middle-class population have already made it a magnet for residential estates, mixed-use developments, and commercial hubs such as Two Rivers Mall and Kiambu Mall.
Developers have welcomed the move, noting that improved connectivity will enhance property values and unlock new investment frontiers in areas such as Ndumberi, Riabai, and Ting’ang’a.
“Transport infrastructure remains the single biggest driver of land value appreciation,” noted Nancy Gitonga, a property economist with the Kenya Property Developers Association (KPDA). “The Muthaiga–Kiambu expansion will make the area more attractive for affordable housing, retail chains, and light manufacturing.”
Socio-Economic Impact
The project will generate hundreds of jobs during construction and strengthen supply chains for local materials such as aggregates, steel, and bitumen.
It will also improve access to social amenities including schools, hospitals, and markets for thousands of commuters who travel daily between Kiambu and Nairobi.
For small businesses — particularly matatu operators, boda-boda riders, and roadside traders — better road infrastructure means faster turnaround times and reduced vehicle maintenance costs.
The inclusion of non-motorised transport lanes and safe crossings will also improve pedestrian safety, a persistent challenge on the current stretch that has recorded several fatal accidents in recent years.
Aligning with Vision 2030 and Sustainable Development Goals
The Cabinet affirmed that the dualling supports Kenya Vision 2030’s infrastructure pillar and aligns with UN Sustainable Development Goal 9 (Industry, Innovation, and Infrastructure) and Goal 11 (Sustainable Cities and Communities).
By promoting sustainable mobility and reducing congestion, the project is expected to contribute to lower carbon emissions, improved air quality, and better urban resilience.
“Efficient transport networks are the arteries of a modern economy,” said Prof. Mary Wanjiku, an urban development scholar at the University of Nairobi.
“This project reflects Kenya’s shift toward sustainable urban planning, where mobility, safety, and environmental stewardship go hand in hand.”
BusinessRadar Insight
The Muthaiga–Kiambu–Ndumberi Road dualling is more than an infrastructure project — it’s an economic artery being re-engineered for the next generation.
If executed efficiently, it could cut average travel times by over 40%, decongest Nairobi’s northern suburbs, and catalyse billions in real estate and business investments.
For Kenya’s capital region, this marks another step in transforming gridlock into growth — and congestion into connectivity.
