Motorists Stranded Overnight as Trailer Crash Chokes Nairobi-Mombasa Highway

NAIROBI, Kenya — A trailer crash at Kapiti Plains left motorists stranded for hours on the Nairobi-Mombasa Highway, with queues stretching for kilometres as the blockage spilled far beyond the accident scene.

The disruption began on Thursday night and continued into Friday morning, with reports of motorists spending close to 10 hours caught in the gridlock.

Traffic was reported from the Malili area towards Machakos Junction near Konza, while congestion also affected the Athi River side of the highway.

The Nairobi-Mombasa Highway is one of Kenya's busiest transport corridors, carrying long-distance buses, matatus, trucks and trailers between the capital and the Coast.

When a crash blocks both carriageways, the effect can quickly spread across a much wider section of the road.

Two trailers reportedly collided

Initial reports indicate that two trailers travelling in opposite directions collided at Kapiti Plains late Thursday.

The impact reportedly left both sides of the highway blocked, making it difficult for other vehicles to pass.

The Long Distance Truck Drivers and Conductors Association (LoDDCA) said the accident had triggered extensive congestion along the A109.

"After last night's accident, traffic has now stretched from Malili to Machakos Junction and from Athi River past Machakos Junction along A109," the association reported.

LoDDCA also blamed overlapping — where motorists move outside their proper lanes or use the wrong side of the road to bypass queues — for worsening the situation.

The exact circumstances leading to the collision had not been established by Friday morning.

There was also no confirmed official death or injury toll available for this particular crash at the time of publication.

That distinction is important because images and videos circulating online do not, on their own, establish the number of casualties.

Why the traffic spread so far

The Kapiti section is not an isolated rural road.

It sits on the heavily used stretch connecting Athi River, Konza, Machakos and the southern section of the Nairobi-Mombasa transport corridor.

A previous road-safety assessment identified several blackspots along the Salama-Athi River section, including the Makutano-Kapiti-Konza area.

The highway also carries a large volume of heavy commercial traffic.

That combination means a serious blockage can quickly create a second problem: vehicles that cannot move begin occupying available road space, while other motorists attempt to find ways around the queue.

This appears to have contributed to the scale of the latest congestion, although an official assessment of the traffic management operation was not immediately available.

Kapiti has seen several serious crashes

The latest traffic crisis comes less than three weeks after a fatal crash at the same broader Kapiti Plains stretch.

On September 16, police said five people died after a Toyota Hiace matatu collided with an oncoming Isuzu FH lorry.

Seven other passengers were injured and taken to Machakos Level Five Hospital, according to police accounts reported by The Star.

In July, another major crash near Kapiti involved a passenger bus and trucks.

Six people were killed and dozens of passengers were injured after a collision involving a Tahmeed bus and two trucks.

The repeated crashes have kept attention on road safety along the corridor, particularly where passenger vehicles and heavy trucks share the same highway.

However, the circumstances of each crash are different, and it would be premature to attribute the latest collision to a particular cause before investigators complete their work.

Mombasa Road already facing separate disruption

The latest gridlock comes as motorists using Nairobi's Mombasa Road are also dealing with a separate traffic restriction.

KeNHA partially closed the JKIA-bound section at the Cabanas-Eastern Bypass off-ramp from September 17 to October 22 to allow construction of a box drain.

Motorists coming from the Eastern Bypass towards JKIA have been directed to use a designated diversion lane, with traffic marshals deployed to guide vehicles.

The Cabanas works are separate from the Kapiti crash and should not be presented as the cause of the overnight congestion reported in Machakos County.

But they add another pressure point to a road network already carrying heavy traffic.

Motorists urged to exercise caution

Drivers heading towards Kapiti, Konza, Machakos and the Coast should expect possible delays while traffic conditions stabilise.

Motorists have also been urged to avoid overtaking through queues or driving on the wrong side of the road in an attempt to bypass congestion.

Such manoeuvres can create further collisions and make it harder for emergency and recovery teams to reach crash scenes.

KeNHA lists a Lower Eastern regional office in Machakos and provides a national customer service hotline for road-related concerns.

For now, the immediate priority is clearing the wreckage and restoring normal movement.

But the overnight chaos has again highlighted a wider problem along the Nairobi-Mombasa corridor: when a major crash blocks a key section of the highway, thousands of motorists can be affected long after the collision itself has ended.

About the Author

Maureen Onyango is a journalist passionate about storytelling, life coaching and spiritual lessons. She studied at the Kenya Institute of Management and enjoys telling stories that inform, inspire and empower communities.