The Kenya National Highways Authority (KeNHA) has warned that motorists using the Nairobi Southern Bypass should brace for temporary traffic disruptions this coming weekend.
In a notice issued on Tuesday, October 21, KeNHA Acting Director Kula Kimeli revealed that the Bypass will remain closed for 14 hours, from midnight Saturday, October 25, to 2:00 p.m. on Sunday, October 26.
KENHA to Close Southern Bypass for Standard Chartered Nairobi Marathon
The Southern Bypass will be closed from Ole Sereni Interchange to Kikuyu Town to facilitate the Standard Chartered Nairobi Marathon.
“The Kenya National Highways Authority (KeNHA) wishes to notify the public on the temporary closure of Nairobi Southern Bypass from Ole Sereni Interchange to Kikuyu Town on Saturday, October 25, 2025, at Midnight to Sunday, October 26, 2025, at 2.00 pm,” read the notice in part.
“This is to allow for the 2025 Standard Chartered Nairobi Marathon.”
The authority advised motorists to use Mombasa Road (A8) from Ole Sereni Interchange, through Uhuru Highway, and vice versa.
“All road users are further advised to follow the traffic signs and guidance as directed by traffic marshals and the police,” KeNHA noted.
Also Read: KeNHA to Close Thika Road Section for Two Months
Road Closures and Traffic Diversions
Accessible Areas
| From | To | Diversion |
| Kikuyu | Dagoretti via Southern Bypass | Vehicles will be able to access Dagoretti from Kikuyu through the Southern Bypass |
| Karen (Karinde) | Kikuyu via Southern Bypass | Vehicles will be able to use the Southern Bypass to access Kikuyu from Karen through Dagoretti Road |
12:00 am – 12:10 pm Sunday, 26th October 2025
| From | To | Diversion |
| Karen Shopping Centre | Kikuyu via Southern Bypass | Vehicles to use Dagoretti Road |
| Karen Shopping Centre | Mombasa Road via Southern Bypass | Vehicles to use Langata Road |
| Langata Road (Galleria Mall) | Kikuyu via Southern Bypass | Vehicles to use Dagoretti Road via Langata Road |
| Langata Road (Galleria Mall) | Mombasa Road via Southern Bypass | Vehicles to use the Uhuru Highway through Langata Road |
| ICD | Kikuyu via Southern Bypass | Vehicles to use Waiyaki Way through Mombasa Road / Uhuru Highway |
| Mombasa Road | Ole Sereni | Vehicles to access Emara Ole Sereni through Westgate Mall |
| Likoni Road | Mombasa Road (through Southern Bypass) | Vehicles to use Enterprise Road |
Also Read: KeNHA Announces Closure of Major Nairobi Road for 42 Days
12:00 am – 1:30 pm Sunday, 26th October 2025
| From | To | Diversion |
| Kikuyu | Mombasa Road via Southern Bypass | Vehicles to use Waiyaki Way |
| Dagoretti | Mombasa Road via Southern Bypass | Vehicles to use Waiyaki Way or through Ngong Road and Mbagathi Way |
| Lenana (Ngong Road) | Kikuyu via Southern Bypass | Vehicles to use Waiyaki Way through Waiyasha Road or James Gichuru Road |
| Lenana (Ngong Road) | Mombasa Road via Southern Bypass | Vehicles to use Langata Road through Karen Road |
| Waiyaki Way | Mombasa Road via Southern Bypass | Trailers and Lorries to use Waiyaki Way |
The Standard Chartered Nairobi Marathon is set to take place on Sunday, 26th October 2025, at Uhuru Gardens, Nairobi.
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