Sustainability

The Warrego Highway is the principal road link between Brisbane and Toowoomba, a major provincial city on the eastern edge of the Great Dividing Range some 130 km to the west. The four-lane section of the highway extending nearly 6 km east from Toowoomba to Withcott, part of which traverses...

The City of Blacktown, located approximately 40 km west of Sydney, has experienced a massive expansion of industrial, commercial and residential development over the last two decades and continues to be one of the maior growth centres in the Sydney region. Luxtord Road, a major collector road with a four...

Many Local Government authorities in Australia are finding themselves in the position where roads constructed many years ago are now showing signs of distress. This can be due to a deterioration in the riding surface, a loss pf structural capacity in the pavement itself or, as is often the case,...

Stabilisation, already widely used in road pavements in Australia, is being increasingly specified by engineers in three general areas: (a) To improve the engineering properties of sub- grade materials. (b) To modify or strengthen locally available materials which are often of a marginal quality in a situation of diminishing availability...

The Brisbane City Council operates a Pavement Management System for the identification of the pave- ment needs of the City’s 4400 km of roads. Roads with failed areas exceeding 20 per cent and in need of rehabilitation are identified by this system. One of the rehabilitation methods adopted for roads...

In recent years there has been increasing usage of cement-stabilisation techniques to rehabilitate or re- cycle existing granular road pavements, providing a major service-lite extension for them at a cost much lower than that of reconstruction. This technique has now been successfully extended to include forestry roads. Following a successful...

During 1990 large inland areas of Queensland and New South Wales were devastated by severe floods. Considerable media attention was devoted to the effect of these floods on people and their property. Evacuation, flood-relief oDerations and subseauent rehabilitation of towns damaged by the floods were widely reported. One element of...

Until the last few years the main use of pavement rehabilitation by recycling the existing pavement by cement stabilisation had been in urban roads administered by Local Government. The existing pavement thicknesses and therefore the depths of pavement recycling in these applications are typically 150—200 mm. Using similar procedures the...

The Victorian Roads Corporation (VIC ROADS) has recently completed Australia’s largest single road pavemen1 recycling programme. The key process used in the programme was the insitu cement stabilisation of the existing pavement material and bituminous surfacing. Within an annual statewide contract, an area of pavement of 800 000 m+ in...

Over the period October 1990 to December 1992 the Roads and Traffic Au1hority (RTA) in NSW has comDleted the rehabilitation of about half a million sauare metres of the Pacific Highway. The work has been located within sections of the Highway from Bulahdelah to the Port Macauarie area. An integral...

Precast drainage structures play an important role in road d infrastructure renewal and augmentation where minimising the interruption to traffic flow during works is vital. In some rural areas there is not always ready access to skilled concrete workers while restricted site access and speed of construction are major challenges....

Much of the mechanism to minimise the environmental impact of new, and upgrading of existing, roads is described in environmental impact statements (FIS). Recently, the community has played an important role in the preparation of EISs by assessing the potential impact and benefits derived from such statements Prepared by engineers....