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The current 21 km long Kampala Northern Bypass Highway in Uganda is forming a semicircle across the Northern suburbs of Kampala. The construction was finished in 2009, but already at this stage it was found necessary to upgrade the road to improve the capacity.
The purpose of the bypass is to improve the East-West traffic flow and ease traffic congestion in the city centre. The new capacity improvement will relieve congestion, reduce travel time and vehicle operating costs as well as protect Kampala’s city roads from heavy commercial through traffic.
The rationale behind the original design was to limit the number of interchanges to the bypass due to capacity and safety considerations.
The existing intersections are all roundabouts with exception of Bombo which is a grade separated interchange. The grade separation included in the new design improves the capacity of the intersection by providing uninterrupted traffic flow (fly-overs).
The upgrading works can be summarised as:
Bridge structures are the major components of the grade-separated interchanges, which will provide overpass at Hoima, Gayaza, Bukota-Kyebando and Naalya roundabouts and an underpass at Ntinda interchange.
Further to the bypass works, service roads shall be constructed and utilities relocated as required.
An important input for the design review conducted by COWI, is the evaluation of the capacity of the grades separated intersections (fly-overs with roundabouts), using the state of the art traffic simulation software VISSIM. VISSIM handles various types of traffic flows and different vehicle fleet compositions as well as the performance of traffic light regulations.
By Jan Holm PedersenPublished 05.08.2014
Jan Holm Pedersen Project DirectorRoads and AirportsTlf: +45 5640 email@example.com
COWI's services include design review and construction supervision over the full three years construction period and one year defect liability period.
Roads and highways
The Construction works has been awarded to the Portuguese contractor Mota-Engil Africa and the Client is the Ministry of Finance represented by Uganda National Roads Authority (UNRA). The project is partly (58%) funded by the EU.
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