The association argues that constructing a highway above the existing Thika Superhighway could duplicate infrastructure instead of providing a lasting solution to congestion along the busy corridor.
In a statement dated Monday, November 2, 2026, MAK questioned the need for an additional elevated road, noting that Thika Road already has multiple lanes, interchanges, pedestrian footbridges, controlled entry points and service roads.
The association pointed out that some sections between Pangani, Wangari Maathai Road and Thika have as many as 12 lanes.
It argued that improving existing junctions and managing traffic more effectively would be a better approach than constructing another road above the current highway.
Concerns over businesses and the environment
MAK has also raised concerns about the possible effects of the elevated structure on businesses operating along Thika Road.
According to the association, the supporting pillars and concrete structures could reduce natural light, increase noise and pollution, and affect the attractiveness of commercial premises.
The group warned that construction activities could also interfere with existing traffic lanes, access roads and businesses, potentially disrupting economic activities along the corridor.
However, the actual effects will depend on the final engineering design and how the construction work is organised.
Questions over traffic congestion
Another concern raised by the association is whether the additional road capacity would solve congestion or simply move traffic jams to other parts of Nairobi.
MAK argues that motorists could experience faster movement along the elevated road but still encounter congestion when connecting to other busy city routes.
It identified Pangani Junction as one of the areas requiring attention and proposed improvements such as cloverleaf interchanges and better traffic management.
The association also mentioned Khoja Roundabout and several exit points along the corridor as areas where improvements could help traffic flow.
Alternative transport proposals
Instead of concentrating investment on another highway, MAK wants the government to strengthen public transport.
Its proposals include improving commuter railway services, developing a high-capacity light rail system, establishing dedicated Bus Rapid Transit corridors and providing better facilities for pedestrians and cyclists.
The association has also suggested developing bypass links connecting Kilimambogo, Tala and Kantafu to Thika Road and Kajiado, alongside improvements to the Mitaboni-Konza corridor.
It believes these alternatives could spread traffic across a wider road network and reduce dependence on private vehicles.
What the government plans
The proposed elevated expressway is expected to cover approximately 60 kilometres, connecting Thika town to Museum Hill in Nairobi, where it would link with the Nairobi Expressway.
President William Ruto announced the project during the 62nd Jamhuri Day celebrations in December 2025.
The government intends to pursue the development through a Public-Private Partnership arrangement. The estimated cost has been reported at between Sh150 billion and Sh200 billion, although the final project cost and financing arrangements remain subject to further studies.
Deputy President Kithure Kindiki said on October 28, 2026, that the President was expected to preside over the groundbreaking ceremony within one to two months.
Design and feasibility studies began in October 2026 to establish the project's engineering requirements, environmental and social effects, traffic capacity and land requirements.
The Motorists Association's opposition adds another dimension to the debate over how Kenya should invest in transport infrastructure, particularly along one of the country's busiest commuter corridors.
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