Roadway Project in Lusaka, Zambia, Reduces Traffic Accidents
Stanley Consultants completed the final design for the rehabilitation completion of a 53.3 km segment of the Zambia trunk road which links the capital city of Lusaka with the industrial town of Kafue.
The 20-year-old road has received poor maintenance and is in varying stages of distress. Pavement conditions are relatively good in some sections with only limited areas of block cracking. In other areas, surface cracking has allowed moisture to penetrate the protective surface membrane causing road failure. Contributing to the deterioration is a growth of vegetation and silting of side and cross drains which has resulted in the failure of the under layers. Lack of shoulder maintenance has resulted in dangerous drop offs and edge raveling on virtually the entire project length.
Rehabilitation included complete reconstruction of 9.85 km, overlay and sealing of 29.85 km, and the patching and sealing of 9.70 km of roadway. The existing alignments were maintained except for minor roadway relocation in two locations. Improvements removed existing traffic bottlenecks allowing an increased traffic volume to travel at higher speeds and have reduced accident and breakdown rates and transportation costs.
Stanley Consultants completed final design, which was already started. All work previously undertaken was reviewed, old data and information gaps were updated and filled by additional desk and field work, and preliminary engineering designs were refined and expanded to a level of detail enabling a contractor to visualize the project scope, estimate the work content, and complete rehabilitation. Other services included construction supervision and assistance in administering the construction contract. Road maintenance equipment, material storage facilities, and spare parts have been procured and provided.