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

  • ITS World Congress debates perceptions of enforcement
    December 4, 2012
    The technical programme of this year’s ITS World Congress in Vienna includes a special session on the image of enforcement. ITS International examines the scale of the problem and what can be done about it. Debate on the merits and difficulties of enforcing speed limits appears centred on a conflict of principles. Put very simply, local communities, people living close to busy or hazardous roads, want to see traffic speeds calmed. Drivers on those roads, on the whole, want their principle of freedom to be m
  • Fixed or wireless communications?
    February 3, 2012
    Optelecom-NKF's Coen Hooghiemstra considers the play-offs and pay-offs involved when deciding whether to go for fixed or wireless communications solutions
  • Clearview Intelligence: The UK failing to embrace innovation to tackle road safety
    November 10, 2017
    60.3% of the 2,000 road safety professionals who attended the premier highway event at Highways UK revealed in a survey that new technologies and road safety innovations are vital to improving driver behaviour and road safety. However, 44% of the attendees are not adopting new road safety innovations today, according to the latest research conducted by Clearview Intelligence (CI).
  • Telvent relocates and takes a global stance on ITS
    March 12, 2012
    Telvent's Manuel Sanchez Ortega, on relocating the company's headquarters to the US and how that fits in the international scheme of things. The change-of-address cards are in the post; Manuel Sanchez Ortega has just moved homes. The domestic upheaval of Telvent's Chairman and Chief Executive comes as a result of the decision to relocate many of the company's headquarter functions from Madrid to Rockville, Maryland in the US. Viewed in the context of its significant recent acquisitions in North America - am