Cabinet has cleared the long-awaited upgrade of the 20.2-kilometre Nairobi Northern Bypass, finally putting the city’s last single-lane bypass on course for expansion.
For years, commuters between Ruaka and Ruiru have crawled through morning and evening gridlock as lorries, matatus, and boda-bodas squeeze onto a single carriageway. The congestion pushes up fuel costs, drags down productivity, and pumps exhaust fumes into nearby estates.
Under the new plan, the existing road will double in width. Eight interchanges, overpasses, and underpasses will replace the current stop-and-go junctions, while dedicated walkways and cycle tracks aim to make the corridor safer for pedestrians and cyclists. Improved drainage and upgrades to adjoining roads round out the works.
| Key Feature | Current State | After Upgrade |
|---|---|---|
| Carriageway | Single lane each direction | Dual carriageway |
| Junctions | Standard intersections | 8 grade-separated interchanges |
| Non-motorised facilities | Minimal | Walkways, cycle paths |
| Length | 20.2 km | 20.2 km (wider) |
Stretching from Ruaka in Kiambu County to Ruiru, the Northern Bypass links both the Western and Eastern bypasses but has remained the network’s weak link. Peak-hour backups often spill onto feeder roads, frustrating businesses that rely on timely deliveries to industrial zones in Nairobi and Kiambu.
Transport analysts say the revamp will cut travel times, lower logistics costs, and open faster access to economic hubs, including the upcoming Nairobi Railway City regeneration. Crucially, the wider road should also improve safety, with smoother traffic flow and fewer risky overtakes.
The bypass overhaul sits within a broader Cabinet push to modernise infrastructure and spark economic growth. However, no timelines were provided for the expansion.
