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

  • September 6, 2017
    Rating agency Standard and Poor Tolling sees a bright future for tolling
    Few disruptions appear on the horizon for global toll road operators, with the US poised to become a better bet for major investment, according to ratings agency Standard and Poor’s (S&P’s) Global Ratings’ 2017 report, which rates toll road operators according to their ability to raise capital. The outlook is generally stable for business conditions and credit quality for toll roads worldwide. One positive exception is the US where the overall outlook is ‘positive’ as S&P expects traffic growth to increase
  • July 16, 2012
    The financial benefits of public transport
    According to the UITP, the International Association of Public Transport, public transport offers even better value for money than usually stated. To address the issue, it has released a Focus Paper - Assessing the benefits of public transport - and is holding a special session dedicated to the theme during the UITP World Congress in Vienna, Austria, from 7-11 June.
  • March 29, 2018
    Report highlights community impact of new mobility options
    Local authorities and communities must understand the impacts of the new mobility options and regulate to get the transport systems they want, according to a new report. Colin Sowman takes a look. Outside of the big cities plagued with congestion, the existing transportation system(s) often cope adequately, and the ongoing workload (maintenance, safety…) is more than enough to keep local transport authorities busy. Is it, therefore, a good use of public service employees’ time to keep abreast of the raft
  • March 29, 2018
    Report highlights community impact of new mobility options
    Local authorities and communities must understand the impacts of the new mobility options and regulate to get the transport systems they want, according to a new report. Colin Sowman takes a look. Outside of the big cities plagued with congestion, the existing transportation system(s) often cope adequately, and the ongoing workload (maintenance, safety…) is more than enough to keep local transport authorities busy. Is it, therefore, a good use of public service employees’ time to keep abreast of the raft