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

  • February 2, 2012
    Financing the US road infrastructure – road user charging?
    In the US, the National Transportation Infrastructure Financing Commission's report to Congress will state that a national, distance-based charging is the only long-term solution to the country's infrastructure financing problems. The Commission's Chair, Rob Atkinson, talks to ITS International
  • February 2, 2012
    Financing the US road infrastructure – road user charging?
    In the US, the National Transportation Infrastructure Financing Commission's report to Congress will state that a national, distance-based charging is the only long-term solution to the country's infrastructure financing problems. The Commission's Chair, Rob Atkinson, talks to ITS International
  • September 23, 2014
    Confusing funding and financing can be costly
    Tolling may be the way forward for paying for the roads of the future - but where will concessionaires find the money and do they need funding or financing? Increasingly, governments around the world are concluding that they can no longer pay for new roads and are turning to the private sector for help.
  • August 15, 2019
    IBTTA Summit: satellite tolling is the future
    IBTTA members met in Florida to consider the technological changes that will impact their businesses – including satellite tolling. Colin Sowman reports from Orlando Over decades, the technology employed in toll collection has been honed to near perfection – automatic number plate recognition (ANPR) and radio frequency identification (RFID) tags are easily within a couple of per cent of infallibility even at highway speeds. However, technical innovations beyond the confines of the toll road cannot b