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Review of Sign Size for Electronic Regulatory Speed Signs
This report documents research to determine if the size of electronic regulatory speed signs (ERSS), such as variable speed limit signs, could be reduced without adversely impacting efficiency of driving or safety.
Update of Double / Double Design for Austroads Sprayed Seal Design Methods

This document is an update of the design procedure for double/double sprayed seal surfacing. The information supersedes that in Update of the Austroads Sprayed Seal Design Method(Austroads 2006), and replaces Sections 6, 7 and 8 in that document.

Establishing a Reference Aggregate for Aggregate Polishing Tests

Polished aggregate friction value (PAFV) tests are used by most jurisdictions in Australia to determine the resistance of aggregates to the polishing action of vehicle tyres on the road. Two versions of the PAFV test are used in Australia: the…

A New Reference Aggregate for PAFV Testing

This report describes studies of the effects of test conditions on vertical polished aggregate friction value (PAFV) results and the results of a proficiency study which was conducted to determine a preliminary PAFV value for UK aggregate. The…

Aggregate Wetting and Initial Adhesion of Sprayed Sealing Binders

Cutting solvents have been traditionally added to binders used in sprayed sealing in Australia and New Zealand to ensure that effective adhesion occurs between binder and aggregate. Recent Polymer modified binder (PMB) sealing failures, which have…

Aggregate Wetting Experiments and Effects on Recommended Polymer Modified Binder Cutter Levels

The work described in this report determines updated cutter level recommendations for S10E and S20E binders. Studies were also conducted to investigate the relationship between the contact angle of water on films of bitumen and PMB binders, and…

Upstream and Downstream Detection to Improve Congested Network Operation
Congestion in Australian cities has continued to get worse with significant increases in population and new car registrations. About a million new motor vehicles per year were registered in Australia in the years 2005-2007 before the global…
New Traffic Signal Controller - Functional Specifications
This report provides a traffic or logical architecture for the new controller. Austroads recognised the need to develop a new generation of traffic signal controllers, making use of modular, scalable design with an open architecture. Two key…
Treatment of Flushed Seals Using Chemical Solvents
This Pavement Work Tip is a practical guide for restoring texture to bleeding or flushed surfaces by applying additional aggregate with the assistance of chemical solvents.
Traffic Signal Controller - Future Directions: Functional Requirements
This report includes the examination and recommendation of a five-layer framework to implement controller functions. The key benefit of this concept is the clear demarcation of functions. The proposed concept allows functions to be built logically…