Climate disclosure | Contents
Figure 28 – Example climate-related logic map for increased instance of extreme rainfall
Resilient infrastructure and operations
Our infrastructure and operations may face a range of climate-related acute and chronic physical and transitional risk drivers, which may lead to financial, operational, and service delivery impacts. See page 57 for a more detailed summary of threats and opportunities. These include transitional risks such as changing stakeholder, regulatory and political environments, as well as acute physical events such as Ex-Tropical Cyclone Alfred, which brought up to 275mm of rain and wind speeds over 100km/h 1 to the Brisbane region in 2025 (for more information, see page 56). Figure 28 illustrates a climate-related logic map for the potential financial impacts of increased instance of extreme rainfall. Based on climate-related physical and transition risks identified and assessed to date, through high-level qualitative scenario analysis and asset-specific CCAPs, we currently do not expect any material impacts within the next financial year. Considering the increasing frequency and intensity of extreme weather events based on climate science data, we may be affected by both acute physical events and chronic climate risks, particularly over the medium to longer term. You can read more about our CCAPs on our website and view progress on our CCAPs in our FY25 Sustainability Data Pack. Read more on our assessment of potential financial impacts of climate-related risks in Note B3 of the financial statements.
Increased instance of extreme rainfall
Flooding on Transurban roads and connecting arterials
Disruption for road user
Financial impacts
Reduced road trips
Increased maintenance of drainage
Lower revenue
Higher costs
Potential flow on effects
Impact on value of concessions
Impairment
Changes to maintenance schedule
Climate scenarios Within the business, we use three climate scenarios associated with global temperature increases to test possible future conditions (Figure 29). In FY24 these were updated as part of our internal climate training. The scenarios were used in risk assessment workshops with stakeholders across the business to promote awareness and inform our continuing strategy work.
Each of the scenarios present opportunities across the various time horizons. These include asset efficiencies through improved design, sustainable finance, adoption of innovative technology, the use of lower carbon materials, and uptake of electric vehicles. You can read more about testing resilience through climate scenarios on our website.
Figure 29 – Climate scenarios
Well below 2°C of warming
2 to 3°C of warming
More than 3°C of warming
Introduction of new government policies and taxes drives a rapid reduction in global emissions, achieving net zero by 2050 and avoiding the worst physical impacts (aligned to SSP1 / RCP2.6)
The transition towards net zero is led by the market, supported by government incentives. Net zero will be achieved around 2070 (aligned to SSP2 / RCP4.5)
Emissions will continue to rise with little or no shift towards a low carbon future. Physical impacts will be extreme and become more severe from 2040 onward (aligned to SSP3 / RCP7.0)
1 Bureau of Meteorology, Post Cyclone Report on Severe Tropical Cyclone Alfred
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