SMEC carried out the initial investigations which included structural, geometric and traffic accommodation considerations. SMEC’s services included geometrics and structural design, materials investigation and pavement design, traffic analysis and construction supervision.
The Ballito Interchange Upgrade, located 45 km north of Durban, was identified as a priority project by the South African National Roads Agency SOC Ltd (SANRAL). This was due to increased traffic flow predictions in the surrounding area, caused by new developments including growth around the new King Shaka International Airport.
Due to capacity and topography constraints, the existing diamond interchange was replaced with a new Partial Cloverleaf Type A2 Interchange system. This required the construction of a new bridge, located 90 m south of the existing bridge, to accommodate three lanes in each direction.
In addition to the interchange construction, associated works included contiguous piled wall and cladding between ramps; pedestrian facilities including bus bays; street lighting; signage; service relocations; and pipe jacking of a 1,800 mm diameter concrete pipe under the N2 as well as demolition of the existing bridge over the N2.
- South Africa
- Technical Area:
- South African National Roads Agency SOC Limited (SANRAL)