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

  • June 16, 2020
    Speed limits: is 20 really plenty?
    Speed kills – which means cutting speed should cut collisions. But is it that simple?
  • February 1, 2012
    ITS needs continuity at the policy-making level
    ITS needs to be sold to politicians in plainer terms and we need to be encouraging greater continuity at the policy-making level says Josef Czako, chairman of the IRF's Policy Committee on ITS. At the ITS World Congress in New York in 2008, the International Road Federation (IRF) held the inaugural meeting of its Policy Committee on ITS. The Policy Committee's formation, says its chairman, Kapsch's Josef Czako, reflects an ongoing concern over the lack of deployment of ITS technology on roads in anything li
  • October 6, 2020
    Cohda adds 500 OBUs to Australian CV trial 
    ICVP will explore safety benefits of emerging tech and help reduce road facilities 
  • November 28, 2013
    Roadside infrastructure key to in-vehicle deployment
    The implementation of in-vehicle systems will require multilateral cooperation, as Honda’s Sue Bai explains to Colin Sowman. Vehicle manufacturers will shape the future direction of in-vehicle ITS systems, but they can’t do it on their own. So to find out what they see on the horizon, and the obstacles they face, ITS International spoke to Sue Bai, principal engineer in the Automobile Technology Research Department with Honda R&D Americas. Not only does she play an important role in Honda’s US-based ITS