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

  • The challenging European road to carbon neutrality and the need for distance-based charging
    November 1, 2023
    Fuel taxes are falling and EVs have the potential to create social equity issues. The answer may lie in expanding the use of technology which has successfully been used for two decades with trucks
  • Moovit: Gut feelings no match for data
    August 7, 2019
    Cities that bring in mobility services without data might be missing out on areas where demand is highest. Ben Spencer talks to Moovit’s Alon Shantzer about how the company is helping customers to pinpoint the right locations Launching mobility services without taking into account public transportation data can lead to chaos in cities. That’s the view of Alon Shantzer, vice president international sales at Moovit, the Mobility as a Service (MaaS) provider and transit app. “The data we have can define
  • Report identifies Nashville region transportation needs
    January 30, 2013
    The results of an IBM study of transportation in Nashville and the surrounding region to accelerate its move to better, safer and more reliable transportation for the Nashville region’s citizens released by the Transit Alliance of middle Tennessee and IBM pinpoints areas that could benefit from immediate investment and would help relieve current stress. It also identifies long-term initiatives that could help spur future economic growth and livability in the region. The Transit Alliance commissioned IBM to
  • Road user charging – change the name to change public perceptions
    February 2, 2012
    Jack Opiola explores the oft-underestimated effect that a charging scheme's name can have on public acceptability and ultimate success. The Bard of Avon wrote: "What's in a name?" For transport, especially Road User Charging, that is an especially relevant question.