A recent WRI Working Paper, The Trillion Dollar Question: Tracking Public and Private Investment in Transport aims to estimate the global share of public and private capital investment in the transport sector. The study finds that the global annual figure is between US$1.4 and US$2.1 trillion each year. Private investment accounts for roughly 58% of the total and comprising the majority of spending in high-income countries. Public investment is higher, in aggregate, in low- and middle-income countries; however, according to the World Bank, private participation in transport projects increased 400% from 1990 to 2012. The report concludes that attracting private investment and leveraging public resources to do so will be essential to shifting future investment patterns toward sustainable, low-carbon transport in developing countries.

To read the related blog post, please go to http://www.wri.org/blog/trillion-dollar-question-where-does-transport-investment-come

To download the Working Paper please go to http://www.embarq.org/en/the-trillion-dollar-question-tracking-public-and-private-investment-transport;