y and environmental sustainability; b) high degrees of public/ political support; and c) strong accountability for performance results. Some of the innovative features of transportation infrastructure financing mechanisms are: Accrual public accounting for infrastructure cost, depreciation expense and financing costs (including appropriate return to the shareholder). Use of commercial borrowing as a funding source to encourage fiscal sustainability and demand fiduciary accountability for fund uses, better link accountability to performance, and better distribute benefits and costs. Use of user-pay pricing for heavy goods vehicles as a major aspect of revenue generation for infrastructure and "efficiency gain-sharing", and to effect modal shift (from road to rail) and/or full-cost user pricing to achieve efficiency and environmental sustainability objectives. Network-wide asset planning and project identification, and comprehensive asset management and performance measures. Involvement of local stakeholders in mechanism management, strategic planning and project selection, with high degrees of public transparency. Explicit criteria to promote inter-jurisdictional standardisation/interoperability of equipment-technologies-processes in infrastructure management. 5. Conclusions Key drivers of land transport infrastructure (capital stock and new construction) are the relationships between, on the one hand, GDP and population growth (and GDP per capita growth), and on the other, measures of road use, vehicle ownership and paved-road capital stock - which are embodied in the elasticity between infrastructure (road and rail) capital stock and GDP per capita. Growth in GDP per capita results in higher vehicle ownership, more freight transport, more road traffic, and demand for road infrastructure. There is a relationship between paved-road capital stock (current and lagged) and new construction requirements. The latter include both new construction required for net additions to the value of the paved-road capital stock, a