Investing in road network outcomes: beyond economic development

The paper explores the methodology of an evaluation tool called the Goals Achievement Matrix (or GAM), which has been developed in Queensland, Australia, to assist with the formulation of investment strategies for the road network. The tool is unique as it enables application at the network-wide level, and addresses economic and non-economic objectives in an all inclusive process. The GAM tool enables road planners to develop road investment strategies for 20 years and beyond, with alternative investment scenarios. The methodology of the GAM involves road network objectives, their relative weights and investment vision options, that can be developed in conjunction with stakeholders for transparency and accountability. The necessity for this tool stems from the enormous road network in Australia which is unique in the world. New evaluation techniques and tools were needed to meet the challenges of planning for the future. However, existing traditional models such as benefit cost analysis (BCA) were utilised as much as possible. Each traditional technique alone was not considered sufficient for application to Australian roads. The new GAM methodology incorporates additional economic and non-economic performance criteria which enhance traditional techniques to enable taking account of a diverse range of social, environmental and economic objectives of government and the community.