Case study - Stanthorpe Southern Access by Joseph Marstella and Rod Moss

Abstract

The southern access to Stanthorpe has in the past experienced an unacceptable crash history. Prior to construction, the intersection was a non-conventional multi-crossleg intersection at grade. Following planning and submission for development funding under the targeted road safety scheme, works were implemented to construct a roundabout. Through the early stages of design, points of ingress and egress were assessed to ensure smooth transition from the existing road environment to a roundabout at crossfall. Transitions, ARNDT Analysis and multiple reviews were undertaken to ensure the practicality of the design. The design intent was to ensure driver awareness and redirection of the travelled path through a carriageway change were safe for driver negotiation. Due to political interest, works were staged to commence early construction that facilitated free flowing traffic management. Safety being a key deliverable on this project, works were undertaken to ensure minimal impacts to the public. Rock, subterranean moisture and climatic weather effects were all challenges the construction team worked collaboratively to overcome.