Motorists Sue NTSA Over 50 km/h Speed Limit on Nairobi-Embu Highway

A court petition challenging a newly introduced 50 km/h speed limit zone along the Nairobi-Embu highway has reignited debate over Kenya’s growing network of low-speed enforcement zones targeting motorists along major highways and urban corridors.

The petition, filed at the High Court in Murang’a by motorist Nicholas Karimi Muna, seeks to stop the National Transport and Safety Authority and the Kenya National Highways Authority from enforcing the newly introduced deceleration zone near the Montezuma Monalisa Funeral Home in the Makenji area.

Through his lawyer, Gachie Mwanza, the petitioner argues that the sudden drop from highway speeds to 50 km/h on a dual carriageway creates dangerous driving conditions that could trigger fatal rear-end collisions.

The case now places renewed focus on NTSA’s wider speed enforcement strategy, which has seen the expansion of 50 km/h zones across several towns, trading centres and urban sections along the Central Kenya transport corridor.

The restrictions became more visible following the rollout of smart traffic enforcement cameras under a programme involving NTSA, KCB Bank Limited and Pesa Print Consortium.

Several towns along the Central Kenya corridor have since become active speed enforcement zones, including Kenol, Makuyu, Sagana and Karatina. Other urban sections under strict 50 km/h enforcement include parts of Red Hill Road, Lang’ata Road, and access points leading into Nairobi Central Business District.

Under the programme, authorities planned the deployment of 700 stationary cameras and 300 mobile speed enforcement cameras aimed at monitoring speeding, lane discipline and traffic violations across major roads.

NTSA has repeatedly advised motorists to slow down immediately upon approaching built-up areas, regardless of the speed limit on the preceding highway section.

However, the growing expansion of these zones has triggered mixed reactions among motorists, with some drivers arguing that abrupt speed reductions along high-speed highways create confusion and increase the risk of accidents.

The Murang’a court petition is now expected to test the legality, safety implications and implementation of the speed control measures as debate continues over how Kenya should balance road safety enforcement with smooth traffic movement on highways.