Signalised interchanges and ramp metering are major components of the interface between the arterial road system and the motorway system. The control systems of motorways and arterials are often treated as separate control components, which can introduce inefficient operations on both systems. This project involved a survey of problematic interface sites throughout Australia and New Zealand. Four specific types of interfaces were studied: arterial roads adjoining motorway on-ramps; motorway off-ramps onto arterial roads; motorway-to-motorway interchanges; and motorways terminating at arterial roads. This report examines four case study sites (one for each interface type) which currently or previously have exhibited inefficient traffic operations. Treatments which have been applied have been documented, along with subsequent improvements in operations resulting from these treatments. From examination of the case study sites and discussion amongst jurisdictions, a set of principles, strategies and treatment options has been developed for each of the four interface types. (Author/publisher)
Abstract