• Funding program Roads to Recovery Program
  • Status Completed
  • Transport mode Road
  • Expected start/finish Sep 2020 - Oct 2021
  • Estimated project cost $1,200,000
  • Australian Government contribution $600,000
  • Local Council/Shire South Australian Local Government Grants Commission
  • State SA

Project description

The Basedow Road section is located in an area with highly reactive black clay soils, with typical expansion factors of more than 150mm heave. As a result, the road pavement and kerb and gutter has deformed excessively since construction with deflection of up to 200mm across sections of the road pavement and kerb and gutter alignment. This excessive road deflection severely impedes drainage flows creating deep ponding on the road surface and within the gutter. The ponding water often overflows the top of kerb across the verge into adjacent business and residential allotments, causing localised flooding. Ponding of water is accelerating pavement failure with ingress of water aggravating further pavement deflection. The undulated pavement no longer provides an acceptable level of service in terms of rideable surface, drainage or serviceability and as such the current level of surface provided on Basedow Road, from Walden Street to Menge Road is no longer fit for purpose to accommodate the designated mix of heavy vehicles cars, bicycles and pedestrians. The works will include widening of the wings at the intersection of Basedow Road and Menge Road to safely accommodate the prescribed PBS level 2 vehicles. Basedow Road is currently gazetted as a PBS level 2A (equivalent 26m B-double vehicle) route. The freight industry has been proactively requesting through the national Heavy Vehicle Regulator (NHVR) upgrade of the route to a PBS level 2B (equivalent 30m A-Double vehicle)

Work proposed includes reconstruction of failed pavement and kerb and gutter infrastructure on Basedow Road from Walden Street to Menge Road, including widening of the wings at the Basedow Road / Menge Road intersection.The present road pavement width will be retained, with kerb to kerb distance of 10 metres - plus compacted rubble footpath verge and 1.5 metre wide sealed footpath on both sides. The road pavement is to be a bituminous hotmix pavement wearing course. Works will include consideration of a range of construction techniques such as full depth pavement reconstruction, subgrade conditioning and use of mechanical Geogrid technology. The road horizontal alignment will be maintained along the straight. At the intersection of Basedow Road and Menge Road, the wings will be widened as required to accommodate the PBS level 2B design vehicle, to provide a consistent speed environment commensurate to the vehicle type and local physical constraints such as boundaries and stobie pole infrastructure. This project will upgrade Basedow Road to a level of service sufficient to accommodate its designated freight and community access level of service requirements.

Total cost of proposed project is $1,200,000

Project last updated:

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