KeNHA Announces Six-Month Closure of Bomas–Kiserian Road to Pave Way for Drainage Upgrade

Motorists plying the Bomas–Kiserian (B19) Road are set to face traffic disruptions after the Kenya National Highways Authority (KeNHA) announced the temporary closure of a key section of the busy route for six months.

In a public notice issued on Thursday, KeNHA said the section between Brookhouse and Galleria Mall up to the Catholic University of Eastern Africa (CUEA) junction will be closed from Monday, October 20, 2025, until April 20, 2026, to allow for the construction of two box culverts.

The Authority said the project is part of a broader initiative to improve drainage systems and enhance road safety along the rapidly developing Lang’ata–Kiserian corridor, which has experienced persistent flooding and traffic bottlenecks during the rainy seasons.

“This closure has been necessitated by the scheduled construction of two box culverts along the affected section,” said Luka Kimeli, KeNHA’s Acting Director-General. “The works are designed to improve water flow and reduce flooding incidents that have been experienced during the rainy seasons.”

KeNHA urged motorists to exercise patience and caution throughout the construction period, assuring that measures have been put in place to manage traffic and minimize inconvenience.

To ease congestion, the Authority has provided alternative routes for motorists:

•Those using Lang’ata Road can divert through Lang’ata South Road–Kiboko Road–Banda Lane–Magadi Road.

•Another option is Lang’ata South Road–Kiboko Road–Mukoma Road–Magadi Road near the Shell Petrol Station.

Traffic police officers and marshals will be deployed to guide motorists and ensure smooth traffic flow along the diversions.

Kimeli emphasized that the temporary disruption is necessary for long-term safety and efficiency.

“We advise all road users to follow the traffic diversion plan, observe road signage, and cooperate with traffic police and marshals deployed on-site to ensure safety and order,” he added.

The Bomas–Kiserian stretch serves as a vital link connecting Nairobi’s southern suburbs to Kajiado County, and the closure is expected to affect daily commuters and businesses operating along the route.

KeNHA has appealed for understanding, noting that the upgrade will contribute to improved mobility, drainage, and overall road infrastructure in the area once completed.