One of the challenges with this site was designing a pavement which wouldn't be significantly affected as a result of the ongoing settlement of landfill materials which underlie the road pavement. The pavement design incorporated a foamed bitumen base, which was a relatively new stabilisation treatment at the time, to provide a robust yet flexible base. The stabilisation treatment also helped to avoid any discontinuity of pavement materials and performance at the interface between the existing pavement and new widening.
![]() Before |
![]() Design |
![]() After Construction |



