SMEC was engaged to provide contract administration and construction supervision for the rehabilitation works.
SMEC’s scope of services included:
- Pavement investigations
- Material inspection
- Preliminary and detail pavement geometric and drainage design
- Modelling and mapping.
An innovative construction sequence resulted in improved safety, capacity and reduced maintenance requirements over the pavement lifetime.
TR7/1 forms part of the Trans-Kalahari Highway, connecting Walvis Bay harbour to the capital Windhoek and landlocked neighbour Botswana.
The road required rehabilitation of a deteriorating pavement as well as widening and other geometric improvements to accommodate higher traffic volumes and improve road safety.
Project scope of work comprised:
- Rehabilitation and upgrade of 112 km of rural roadway
- Addition of 13 km of passing lanes to avoid traffic queues
- Widening of 14 river bridges
Rehabilitation and widening through rolling terrain included construction in half-widths. An innovative design approach made it possible to add auxiliary lanes and wider surfaced shoulder at minimal additional cost without requirements for construction of a bypass. Another added benefit of the adopted design approach is the reduced requirement for maintenance over the expected life of the road.
- Technical Area:
- Roads Authority Namibia