The rehabilitation and upgrading of National Route 1, Section 16 between Winburg Interchange (km 77.5) and the Winburg Station (km 89.8)

The project entails the upgrade from a 2 lane single carriageway to a 4 lane dual carriageway. The existing carriageway will also be rehabilitated in full.

Scope of work:
Construction of a second 2 lane carriageway in the northbound direction.
Rehabilitation of the existing carriageway as the southbound carriageway.
All aggregate and pavement layer material is mined and crushed on site. (Approximately 470 000m³ of rock material)
Pavement:
The new carriageway is constructed using rockfill from adjacent cuttings.
300mm stabilized subbase.
150mm G1 base 
40mm asphalt with 20mm UTFC surfacing.
The existing carriageway is rehabilitated in full
The existing asphaltic surfacing is milled off for reuse as a recycled asphalt pavement
The existing base and subbase is insitu stabilized as the new subbase.
New 150mm G1 base course overlay.
40mm asphalt with 20mm UTFC surfacing.
Bridges and other structures:
A new road over rail bridge structure is constructed to accommodate the second carriageway.
Several large drainage structures are extended to accommodate the second carriageway.
Truck staging area:
A stop and rest area for trucks are formalised by constructing a reinforced concrete pavement of 2.4ha in size.