Design of the Phase I BRT corridor in Nairobi

As a starting point, ITDP began with a map, recently produced by MIT, Columbia University, and the University of Nairobi of all of the Matatu routes in the City of Nairobi. This was the first time this map has been put to use for planning purposes and the collaboration proved successful. However, to build a baseline model which provides the full picture of the existing situation, more information was required. ITDP needed to know the hourly stop-by-stop demand for each route, as well as the current bus speeds.

For this purpose the following four different strategies were carried out: The Frequency and Visual Occupancy survey was performed to identify how frequent the buses and Matatus run on routes adjacent to the A104 corridor and how occupied those vehicles are. The objective of the Boarding and Alighting survey was to identify how many passengers get on and off at each of the stops along the route. Furthermore, the transit speed of the vehicles and their delays, as speed and travel time are a large factor in travel choice, were measured. Finally, a Transfer survey was performed in order to identify actual origin-to-destination trip patterns rather than just look at single trips.

The data and information were used to build a baseline travel demand model. Once the baseline model was in place, the demand and the speed of all links of the existing routes were included to develop a basic service plan. Links with the greatest demand show the greatest delay and are located close to the city centre. Based on existing demand and speed, ITDP suggested full BRT infrastructure on the A104 corridor and corresponding links in and around the city centre (CBD), where most of the BRT services will run.

Based on the basic service plan, ITDP has also assisted in the design of the BRT infrastructure. They have first recommended the re-design of critical intersections as well as identified a high-quality infrastructure design through the CBD since many passengers are indeed going to the CBD. This design, aligned to international best practice, will harness the full benefits of the new BRT system allowing passengers to get from origin to destination in the quickest, most efficient way possible.

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