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

  • New technology revolution in urban traffic control?
    January 26, 2012
    Urban traffic control is a well-defined and practised art. Nevertheless, there are technologies here and on the horizon with the potential to revolutionise how we do things. By Gavin Jackman and Andrew Kirkham, TRL, and Jason Barnes. Distributed monitoring and control of urban traffic networks and flows is nothing new. PC-based Urban Traffic Control (UTC) is now well established and operating in many locations around the world. However, it is worth considering the effects of the huge growth in the use of sm
  • Truck platooning trials take to the highways
    July 24, 2017
    There is rising enthusiasm in America and beyond for the concept of truck platooning with trials being planned in several US states, as David Crawford reports. Growing numbers of US states are considering or implementing plans for trials of electronically-linked truck platooning on public road networks. This is in response to the interest being shown by the US$70bn a year road freight industry, where fuel represents 41% of the operating costs making the prospect of improving fuel economy by trucks travellin
  • Truck platooning trials take to the highways
    July 24, 2017
    There is rising enthusiasm in America and beyond for the concept of truck platooning with trials being planned in several US states, as David Crawford reports. Growing numbers of US states are considering or implementing plans for trials of electronically-linked truck platooning on public road networks. This is in response to the interest being shown by the US$70bn a year road freight industry, where fuel represents 41% of the operating costs making the prospect of improving fuel economy by trucks travellin
  • Tokyo snaps up lead in transit performance, says Snapper
    October 29, 2024
    Japan's capital tops on-time table using new comparative Mosaiq Global Transit Index