ABSTRACTThe objective of the study was to identify the freeway systems performance
especially the productivity of a freeway. The study relates literature review to the
Australian National Performance Indicators (NPI) that has been proposed by
Austroads and its verification with Speed-Flow Curves for Basic Freeway
Segments of Highway Capacity Manual 2000. The study found that the
productivity measurement by using NPI method did not mention any clear
limitations and the values did not reflect the productivity of a freeway well.
Furthermore, this study on Speed-Flow Curves for Basic Freeway Segments of
HCM 2000 also suggested a set of values of optimum speed and flow that were
believed more suitable than the normalisation values suggested by Austroads.
