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.

Charging, Tolling & RUC

Related Content

  • August 21, 2017
    Cost benefit goes under the microscope
    Conventional cost benefit analysis (CBA) of plans for urban smart mobility initiatives needs serious rethinking, according to a recently-completed European study. The three-year Evidence Project (the Project) emerged in response to concerns about the availability and quality of documented research – including CBA – required to prove that investment in sustainable urban mobility plans (SUMPs) can be economically beneficial. Covering 22 sectors ranging from electric vehicles to shared spaces, the Project clai
    Read More
  • August 19, 2015
    Costing transit is complicated case
    David Crawford welcomes fresh thinking from Canada. Public transit improvements can bring society “significantly more value” than conventional transport models normally indicate, argues Canadian researcher Todd Litman. “Traditional evaluation practices originally developed to assess roadway improvements, and focus primarily on vehicle travel speeds and operating costs. “They do not generally quantify or monetise basic mobility benefits, vehicle ownership and parking cost savings, or efficient land developme
    Read More
  • June 25, 2018
    Cost benefit analysis ‘can’t be carried out with a cookbook’
    There is far more to working out the worth of a project than simply filling in a few headings on a spreadsheet. David Crawford surveys some recent thinking from the US and Canada. Cost benefit analysis (CBA) “can’t be carried out with a cookbook”, warns US analyst Professor Robert J Brent. “ You can’t just get out a spreadsheet and fill in the data for all the headings. Each transport CBA should have something that is distinctive, in terms of location (for example, for a rural area), types of user
    Read More
  • June 8, 2015
    Sprawl spreads the costs and confines the benefits
    A new report says car-centric planning leads to inefficient cities and divided communities as lead author Todd Litman explains. Between 1950 and 2050 the human population will have approximately quadrupled and shifted from 80% rural to nearly 80% urban; by the middle of this century the United Nations predicts an additional 2.2 billion urban residents in developing countries than there are today. How these cities grow has huge economic, social and environmental impacts and implementing proper policies can c
    Read More

Highlighted Content