Transurban Group Strategy Overview

MAINTENANCE Transurban • Maintenance provision represents the future cost of maintaining and repairing the concession assets • The provision is increased periodically based on budgeted replacement cost for one full cycle of each asset Concession deeds state that the roads are to be maintained to an acceptable standard and must be in the condition set out in the deed on handback Estimated cost is recorded at present value, based on engineer's assessment of required future works • Maintenance of the assets operates in cycles, with the maintenance provision only representative of the current cycle • Recurring (regular) maintenance costs expensed to the P&L during the year including O&M management and costs such as land care management, wall washing and inspections • Unwinding of discount relates to net present value calculation. Shown as a finance cost in the P&L Total statutory maintenance provision of $1,078 million at 30 June 2021 ($144 million current and $934 million non-current) Additional provision recognised Amounts paid/utilised Movement in maintenance provision¹ CURRENT ($M) NON-CURRENT ($M) Carrying value at 1 July 2020 104 1,102 117 (90) Unwinding of discount 35 Transfer 138 (138) Disposals through loss of control of subsidiary² (6) (166) (2) (16) 144 934 Foreign exchange movements Carrying value at 30 June 2021 Maintenance provision theory Cycle 1 Provision build-up Cash outflow Cycle 2 Provision build-up Annual P&L Expense Cash outflow Year 0 1. Extract from 30 June 2021 financial statements-note B19. 2. Relates to the deconsolidation of the Group's ownership interest in Transurban Chesapeake upon divestment of a 50% ownership interest. TRANSURBAN OVERVIEW | AS AT 30 JUNE 2021 Year 5 Year 10 27

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