The Kenya National Highways Authority (KeNHA) has formally announced a temporary shutdown of a critical stretch of Mombasa Road, one of the country’s busiest and most vital road corridors. The closure, which will begin on Saturday, July 5, 2025, and end on Saturday, July 12, 2025, will affect the Nairobi-bound carriageway only, specifically between General Motors (FUSO Simba Colt) and the Southern Bypass Interchange at Ole Sereni.

This section of the highway forms part of the Trans-Africa A8 route, a continental link that stretches from the Port of Mombasa through Nairobi to Uganda and on to West Africa. Its maintenance is not just a national concern but a regional necessity.

Reason for Closure: Critical Highway Maintenance

According to KeNHA Director General Kung’u Ndungu, the closure is necessary to facilitate essential highway repairs. The targeted section is undergoing structural and surface rehabilitation to address wear and tear caused by high-volume traffic and heavy commercial vehicles. With this being a primary cargo and passenger route, the aim is to improve road conditions, extend the lifespan of the infrastructure, and enhance road safety for all users.

KeNHA emphasized that this operation is time-sensitive and part of the government’s broader infrastructure maintenance plan. The works will be done rapidly within the 7-day window to minimize disruption.

Traffic Rerouting and Impacted Motorists

The closure will primarily affect Nairobi-bound motorists, particularly heavy commercial vehicles with a gross weight exceeding 3.5 tonnes, which make up a significant percentage of road users on Mombasa Road. These vehicles will be diverted to exit at the Kyang’ombe Slip Road, which will serve as a temporary bypass.

For other motorists, a single alternate lane will be available through the affected stretch, and access to old Mombasa Road will be provided to distribute traffic and reduce congestion.

KeNHA has asked motorists to adhere strictly to the detour routes and follow guidance from traffic police and marshals stationed along the route. Drivers are also reminded to exercise extra caution near construction zones and to avoid reckless overtaking or sudden lane changes, which could lead to accidents or further delays.

Ongoing Works Across Nairobi’s Road Network

The Mombasa Road closure is not an isolated incident. KeNHA had earlier announced another major disruption at the Gitaru Interchange, which connects Waiyaki Way with the Southern and Western Bypasses. That closure is set to last 45 days, running from June 28 to August 11, 2025, affecting Westlands-bound and bypass traffic. The combination of these two closures means Nairobi residents and commuters should prepare for significant road pressure over the coming weeks.

What This Means for Commuters and Logistics

The ripple effects of this closure will be felt across Nairobi’s transport network. Commuters can expect longer travel times, and logistics companies may face delays in cargo delivery due to the detours and lane restrictions. Businesses relying on just-in-time deliveries or regular supply chain movements should consider rescheduling operations or using alternative transport routes where possible.

Matatu operators, taxi services, and public transport users should also anticipate increased congestion and delays, especially during peak hours. KeNHA recommends that all road users plan their journeys ahead of time, leave earlier than usual, and stay informed through KeNHA’s official updates.

KeNHA’s Assurance and Appeal for Cooperation

Despite the disruption, KeNHA maintains that the maintenance is short-term pain for long-term gain. The improvements are expected to enhance traffic efficiency, reduce vehicle maintenance costs due to poor roads, and improve road safety.

Motorists are urged to cooperate with law enforcement, follow signage and advisories, and above all, remain patient during this critical infrastructure repair phase.