A road built to serve thousands of motorists between Kajiado and Narok counties is now being pushed beyond its limits, with the Kenya Rural Roads Authority (KeRRA) blaming overloaded trucks for the rapid deterioration of the Ngong-Suswa highway as it reassured the public that repair works are already underway.
In a public notice issued on Thursday, the authority said the road is undergoing phased maintenance to restore damaged sections and improve safety following growing public concern over its condition.
"The Authority wishes to clarify that Ngong-Suswa is currently undergoing maintenance in phases to address existing pavement distress caused by overloading and to improve safety for our road users," KeRRA said.
The authority explained that although the road has been in use for the past eight years, the final section of the project was only completed in December 2025.
KeRRA said the road was designed to carry vehicles with axle loads of up to 10 tonnes but has increasingly been used by trucks transporting loads of up to 50 tonnes, leading to faster wear and damage.
"The Ngong-Suswa road was constructed with axle load limits of up to 10 tonnes per axle; however, the road has been subjected to traffic carrying up to 50 tonnes, which has accelerated its deterioration," the authority said, adding that the damage is particularly visible on the right-hand side of the carriageway towards Suswa.
To prevent further destruction, KeRRA said it has installed the Ngong-Suswa-Ewaso-Kedong Virtual Weighbridge to detect overloaded vehicles and enforce axle load rules under the Traffic Act.
"Offenders not complying have been arrested and charged," the authority said, adding that the virtual weighbridge is intended to detect overloaded vehicles before they cause further damage to the national road.
The authority said it will continue carrying out improvements on the road to match the growing traffic demand while calling on transporters and motorists to comply with the required axle load limits.
"We appeal to all road users to adhere to the stipulated load limits to ensure the safeguarding of this National Road asset," the authority said.
The Ngong-Suswa road is an important transport link connecting Ngong and Suswa and is widely used by motorists travelling between Kajiado and Narok counties, making its upkeep vital for the movement of people and goods.