KeNHA: month-long partial closure on Waiyaki Way Mombasa-bound stretch from 31 July
Key points
- Partial close: Mombasa-bound Waiyaki Way between GTC and Kempinski, 31 July–31 August 2026.
- Road classed as A8; KeNHA calls it highway maintenance on the affected stretch.
- Motorists told to use remaining open lanes and diversions; police and marshals to direct traffic.
- Normal operations promised only after works finish — not mid-calendar by default.
31 July to 31 August 2026 is the window Kenya National Highways Authority put on a partial shutdown of the Mombasa-bound side of Waiyaki Way between GTC and Kempinski — a month that will punish Westlands–Riruta peak traffic if drivers ignore diversions, Eastleigh Voice reported from KeNHA's notice.
The agency said the works hit part of the A8 and told motorists to stay on unclosed sections or switch routes rather than queue into a dead lane. Police and traffic marshals will staff the site under a traffic management plan KeNHA asked the public to follow.
Why this stretch bites so hard
Waiyaki Way is a primary western exit from Nairobi. Even a one-direction partial close multiplies bus, matatu and private-car delay into the CBD and onto the Southern Bypass and Ngong Road corridors. Freight that still tries to force the closed edge will back up side streets used by school runs and hospital access.
KeNHA's line is that normal flow returns when maintenance ends — so the practical question is daily lane discipline, not a promise of overnight reopening. Night works, if any, should be posted with exact hours to protect night-shift workers.
What motorists should do from day one
Leave earlier, load maps offline, and treat marshals as primary guidance over social-media shortcuts. Transport desk: Energy & Transport.
County and NTSA messaging should mirror KeNHA's GTC–Kempinski map in one graphic for 31 days so radio call-ins do not invent phantom full closures of both directions.
Businesses along the corridor can stagger deliveries before 7am and after 8pm where contracts allow, cutting the daytime crush on remaining lanes.
Schools and hospitals west of the CBD should post temporary pickup maps for the full 31 July–31 August window. Matatu saccos that still force the closed edge will only lengthen queues for everyone else on the open half of A8.
Based on Eastleigh Voice reporting of KeNHA's Waiyaki Way notice. On-site marshals and later KeNHA updates control day-to-day lane status.
