Nairobi Street Retrofit
Redesigning an arterial for safety without widening the road
A safer multimodal street within the width already available
This independent before-and-after study tests how a motor-dominated Nairobi arterial could better support transit, walking and protected cycling without adding a single metre of road width.
The constraint was not design freedom but how much more an existing street could do within its current corridor. The result is a rigorous illustrative concept, not an approved engineering or statutory design.
We completed the street analysis, multimodal concept design and implementation communication.
- Read the existing street section and current movement priorities
- Apply complete-street and road-safety principles
- Test protected cycling facilities and transit priority within the same width
- Translate the concept into real dimensions and phased implementation notes
- Before-and-after street section
- Facility dimension guide
- Intersection principles
- Phasing notes
- Complete-street and road-safety principles applied to a real Nairobi arterial
- Design intent translated into dimensions and phasing
- Space, speed and safety trade-offs made visible for productive discussion
Bring this capability to a live brief.
County roads departments, development partners and advocacy groups need concrete, buildable cases for safer streets rather than another general guidance document. We turn road-safety principles into corridor-specific design propositions.