KeNHA to expand Kiambu Road into four-lane dual carriageway under China-funded project

Kiambu Road is poised for a major transformation, with the Kenya National Highways Authority (KeNHA) unveiling plans to expand the corridor into a four-lane dual carriageway. The upgrade forms part of a road infrastructure project funded by the China EXIM Bank.

The initiative, officially titled the "Capacity Enhancement of Pangani–Muthaiga–Kiambu–Ndumberi (B32) Road and Adjacent Road Network", targets crucial links between Nairobi and Kiambu County.

It is a key component of the government’s broader agenda to decongest traffic, boost road safety, and strengthen connectivity in the eastern Nairobi Metropolitan region.

KeNHA, which is overseeing the project, has invited eligible Chinese contractors to submit prequalification applications under Tender No. KeNHA/2889/2025. The submission deadline is Friday, August 22, 2025, at 11:00 am EAT.

According to the official tender notice, the project will cover the Muthaiga–Kiambu–Ndumberi stretch and key spurs, including Ridgeways Road, the Kiambu–Thika Road link, and UN Avenue through Runda. Several key junctions along the corridor are also slated for upgrades.

“The project will also improve the level of service and safety for road users and enhance accessibility through service roads and non-motorised transport facilities,” KeNHA stated.

The works will be carried out in line with the FIDIC Silver Book standards.

Interchanges and bridges

Construction will entail upgrading the current two-lane road into a four-lane dual carriageway, along with the development of new interchanges, bridges, and pedestrian infrastructure, including walkways and footbridges.

A total of six pedestrian footbridges are planned along the project route.

KeNHA noted that the upgrade is designed to ease traffic congestion along the corridor and enhance mobility between Nairobi and Kiambu.

“Upgrading of the entire project road to a four-lane dual carriageway, including pedestrian walkways, will ensure better service delivery,” the authority said.

The entire construction is expected to take 36 months, with a defects notification period of 24 months.

Road furniture

In addition to the main road works, the project will also include the installation of road furniture, signage, traffic management systems, and designated bus bays to support public transport.

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Only Chinese contractors or consortia led by Chinese firms are eligible to apply.

Interested bidders are required to meet specific qualifications outlined in the tender documents, including financial capacity, technical experience, and compliance with Chinese government-supported financing arrangements.

Prequalification documents can be accessed through the KeNHA website (www.kenha.co.ke) or the public procurement portal (tenders.go.ke). All inquiries should be directed to [email protected].

Completed applications must be physically submitted to the Director of Development at KeNHA headquarters, Barabara Plaza, located along Airport South Road in Nairobi.

Submissions must be clearly marked with the tender title and reference number.

“All interested bidders are required to continuously check KeNHA and PPIP websites for updates and clarifications,” the notice added.

The road expansion is part of a larger government strategy to modernise infrastructure, reduce urban congestion, and drive economic growth through improved transport networks.