Skip to main content

Monetising time savings makes toll roads financially stack up, says research

Putting a financial value on the savings from traffic congestion, noise and air pollution as a result of toll roads and tunnels will make large infrastructure projects more cost effective, according to a new study by Australia’s Queensland University of Technology (QUT). Sae Chi, from the university’s Science and Engineering Faculty, has compared the financial and economic cost of public and privately operated toll roads and tunnels, and found the net impacts to the community should be taken into account
September 29, 2017 Read time: 2 mins
Putting a financial value on the savings from traffic congestion, noise and air pollution as a result of toll roads and tunnels will make large infrastructure projects more cost effective, according to a new study by Australia’s Queensland University of Technology (QUT).


Sae Chi, from the university’s Science and Engineering Faculty, has compared the financial and economic cost of public and privately operated toll roads and tunnels, and found the net impacts to the community should be taken into account in decision-making about transport infrastructure investment.

The research has been published in the Journal of Transportation Engineering titled Measuring impacts and risks to the public of a privately operated toll road project by considering perspectives in cost-benefit analysis.

The report claims that the financial bottom line should not be the only consideration when determining whether or not to invest in toll roads and tunnels.

Governments often partner with the private sector to share the costs and risks of building and operating toll road and tunnel projects. However, the report says that while private operators were looking for a bottom line return on investment, governments needed to consider benefits in addition to toll charges and traffic flows that can result in profits. Even when partnering with the private sector, it is important that governments consider the public benefits and monetise savings such as travel time, reduced costs to drivers and the positive outcomes for the environment. Chi believes that when governments put a financial cost on these factors the cost-benefit analysis sways much more heavily in favour of supporting infrastructure investment.

Chi said current cost-benefit analysis for road and tunnel projects was limited in Australia, and in most cases focused on the financials and not the public benefits. “But governments are responsible for public decision making for the good of their constituents and this includes ensuring that public funds are invested wisely and that regulation of private sector activity ensures a net benefit to society,” she said.

Chi believes the study findings would help support increased infrastructure investment across the nation, especially in high-growth population areas.

Related Content

  • Hani Mahmassani, ITS 'rock star' academic, passes away
    July 18, 2025
    Distinguished Northwestern professor was mentor to many practitioners
  • Future EV owners can make money from the power grid
    May 17, 2012
    In what is being claimed as a landmark research report published by Ricardo and National Grid in the UK, the market potential is demonstrated for an electric plug-in vehicle fleet of the future to provide balancing services to the power grid on a commercial basis, returning value to vehicle owners while improving the carbon efficiency of grid operation.
  • US ITS systems approach critical decision time
    February 6, 2012
    Connie Sorrell, chair of the ITS America Annual Meeting and Exposition, explains why ITS in America is approaching a critical crossroads
  • US ITS systems approach critical decision time
    February 3, 2012
    Connie Sorrell, chair of the ITS America Annual Meeting and Exposition, explains why ITS in America is approaching a critical crossroads. Connie Sorrell, as Chief of Systems Operations for the Virginia Department of Transportation, doesn't normally speak in hyperbole, but she can't help but be enthusiastic about this year's ITS America's annual meeting in the nation's capitol, 1-3 June, 2009. Certainly, as Chair of the 2009 ITS America Annual Meeting and Exposition, like everyone who has performed this impo