KENYA · INFRASTRUCTURE
Key Facts
- The country Kenya is East Africa’s largest economy, and this road sits on its main route inland from Mombasa.
- What happened The Rironi-Naivasha road was due to be fully dualled by Friday 30 October 2026, and it was not.
- New date Transport Minister Davis Chirchir wants the road fully open to Naivasha by December 2026.
- Why late Chirchir blames a bitumen shortage, tied to oil supply trouble around the Strait of Hormuz.
- Tolls Planned tolls are Sh8 (about US$0.06) a kilometre from Rironi to Naivasha.
The Rironi-Naivasha road delay means Kenya’s new highway will miss its 30 October 2026 deadline, and the government now wants it fully open by December. The road runs northwest from the edge of Nairobi into the Rift Valley, as the first stage of the larger Rironi-Mau Summit highway.
Transport Cabinet Secretary Davis Chirchir, the minister in charge of roads, gave the new target on Friday 30 October 2026 while inspecting the works. For US readers, the road lies on the main freight route from Mombasa towards Uganda, so a late finish affects shipping costs.
In Plain English
Rironi is a town on the western edge of Nairobi, and Naivasha is a lake town in the Rift Valley. The Rironi-Naivasha road is being widened from two lanes to four.
The project is a public-private partnership, a deal in which companies build a road and earn their money back from tolls. The builders are China Road and Bridge Corporation, a Chinese state-owned contractor, and Kenya’s National Social Security Fund, the national pension scheme.
Why the Rironi-Naivasha Road Delay Happened
The Kenya National Highways Authority, known as KeNHA, is the state agency that oversees the road and tolling. Chirchir explained the Rironi-Naivasha road delay while visiting the site on Friday 30 October 2026.
Chirchir said the main problem is bitumen, the black binder that holds asphalt together. He said its price rose from Sh90 (about US$0.69) a kilogram six months ago to Sh220 (about US$1.69) now, more than double.
He linked the shortage to oil supply trouble around the Strait of Hormuz, the narrow sea passage through which much of the world’s oil ships. He added that import costs could fall if the government bundles its orders and uses bigger ships.
The New Date and the Deadlines Before It
Chirchir told the contractor to keep its promise and have the road fully open to Naivasha by December. He said he is optimistic this will happen before the year ends.
On Wednesday 9 September 2026 Chirchir had promised full dualling, meaning a second carriageway for four lanes, by 30 October. That was ahead of the contractor’s own December forecast, and in late August the contractor put overall progress at about 20%.
What Follows the Rironi-Naivasha Road Delay
Once the Rironi-Naivasha road is done, the government says its attention shifts to the rest of the corridor, including the Rironi-Mai Mahiu-Naivasha route. Further north the project continues through Gilgil and Nakuru to Mau Summit.
President William Ruto said in October 2026 that he will open the road to Mau Summit in April 2027. Launched on 28 November 2025 for June 2027, the project is reported to cost Sh183 billion (about US$1.41 billion) to Sh200 billion (about US$1.54 billion).
Tolls and the Cost of Driving
KeNHA’s planned toll on the Rironi-Naivasha road is Sh8 (about US$0.06) a kilometre. From Naivasha to Mau Summit it is Sh8.50 (about US$0.07) a kilometre.
Prices are also rising across Kenya, with annual inflation at 7.3% in October, up from 6.8% in September and above the 7.0% analysts expected. Our explainer on Kenya’s October inflation shows how fuel and food costs are pushing prices higher.
What It Means for US Readers
The road sits on the main freight route from Mombasa towards Uganda, so delays add cost for firms that ship to or from East Africa. American travellers heading to Naivasha, Lake Nakuru or the Rift Valley should expect roadworks, slow trucks and diversions on the Nairobi side.
Check road conditions with your lodge or tour company before long drives. Avoid night driving on this corridor.
What Is Not Known
The government has not said how much of the Rironi-Naivasha road is finished today, so the size of the remaining work is unclear. The cost of the delay to the contractor and to the state has not been published.
It is not clear whether bitumen supply will ease, or whether December will hold after earlier dates slipped. The date when tolls begin has not been announced, and the contractor has not issued a new timetable.
More: Kenya news in English, every day from The Rio Times.
Frequently Asked Questions
When will the Rironi-Naivasha road open?
Transport Minister Davis Chirchir wants the road fully open to Naivasha by December 2026. The earlier deadline of 30 October 2026 was missed.
What caused the Rironi-Naivasha road delay?
Chirchir blames a shortage of bitumen, the paving binder. He says its price more than doubled in six months because of oil supply trouble around the Strait of Hormuz.
How much will tolls cost on the road?
KeNHA’s planned toll is Sh8 (about US$0.06) a kilometre from Rironi to Naivasha. A start date for tolls has not been announced.
Who is building the road?
China Road and Bridge Corporation builds the Rironi-Naivasha stage in a public-private partnership that includes Kenya’s National Social Security Fund. KeNHA is the state agency overseeing it.
Does the Rironi-Naivasha road delay matter to the United States?
The road carries freight between Mombasa and Uganda, so delays raise shipping costs for US firms trading with East Africa. Travellers to Naivasha should expect roadworks.
Sources: Kenya National Highways Authority (KeNHA), Rironi-Mau Summit expressway and toll notices, 31 October 2026; Kenya Ministry of Roads and Transport, statements by Cabinet Secretary Davis Chirchir, 30 October 2026; Kenya National Bureau of Statistics, Consumer Price Index for October 2026, 30 October 2026.
Editorial responsibility: Matthias Camenzind, Editor-in-Chief · Editorial standards · Report an error