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

  • Swedish drivers support speed cameras
    March 17, 2014
    In sharp contrast to many other countries drivers in Sweden support speed cameras and the planned expansion of the automated enforcement network. Sweden is embarking on a massive expansion of its speed camera network and is doing so with both a very high level of public acceptance and without its drivers feeling persecuted; a feat the administrations in many other countries would like to emulate. So how did this envious state of affairs come about? Magnus Ferlander director of business development and ma
  • Road user charging potential solution to transportation problems
    December 14, 2012
    A number of new and highly significant open road tolling schemes have just been launched or are soon to ‘go live’. Systems of road user charging are flexing their muscles as the means to solve politically sensitive transportation problems, reports Jon Masters. Gothenburg, January 2013, will be the time and place for the launch of the next city congestion charging scheme in Europe. In a separate development, Los Angeles County’s tolled Metro ExpressLanes began operating in November 2012 – the latest in a ser
  • Highways Agency publishes 2013 ROI report
    January 16, 2014
    Between 2002 and 2012 over US$5.7 billion was invested on substantial capital investment projects to improve the strategic road network in the UK. The Highways Agency has now published its 2013 Post Opening Project Evaluation (POPE) Meta report is now available on the Agency website, which it says represents the most comprehensive evaluation programme of expenditure within UK transport. Detailed appraisals of individual schemes are also carried out before they are put forward for construction. The broa
  • Considering accessibility costs little and pays dividends for all travellers
    August 8, 2017
    Catering for those with disabilities can be cost-effective and improve services for all travellers, as David Crawford discovers. Clearer understanding of the economic value of accessible transport is essential if we are to speed up the current slow deployment levels, according to the Paris-based International Transport Forum (ITF), which staged a 2016 round table on the ‘Benefits and Costs of Inclusion in Transport’. It wants to see greater availability of data on levels of actual and unmet demand for acces