Operating our road lighting, tunnel ventilation, vehicles and offices uses significant amounts of energy. To reduce our operational impacts and support achieving our greenhouse gas emissions reduction target, we have committed to a 10-in-10 energy reduction target. This means we are working to reduce our total energy usage by 10 per cent in 10 years, from a FY13 baseline.

FY17 energy usage

In FY17 total energy consumption by Transurban-managed assets was 556,568 GJ8

The substantial increase on FY16 energy consumption of 415,829 GJ is mainly due to the acquisition of AirportLinkM7 in April 2016 and subsequent inclusion in FY17 reporting. In FY17, a new method was also adopted to estimate non-reported contractor fuel usage, providing greater data coverage, reporting confidence and transparency.

Electricity used for tunnel ventilation and road lighting makes up the majority of our energy demand, followed by operations, maintenance vehicle fuel and energy used in construction. Tunnel assets are particularly energy-intensive because they must be continually ventilated and lit.

Detailed energy data are available in the Environmental Data appendix.

10-in-10 energy reduction target

Transurban has a 10-in-10 energy reduction target. This means we have committed to reducing our energy use by 10 per cent within 10 years (from FY13 to FY23).

As we have acquired or built additional assets during this 10-year period, we have expanded our target accordingly. This means energy reduction is a priority for all assets, including new assets. This year we added AirportLinkM7 to the scope of our target for the first time.

Our FY17 energy usage of 556,568 GJ means we have achieved a 1.3 per cent reduction in energy use to date since the FY13 baseline.

Major focus areas in the delivery of the 10-in-10 energy reduction target include:

  • Optimising existing tunnel-ventilation control systems in response to updated emissions profiles, vehicle volumes and in-tunnel air quality conditions
  • Investigating whether powered ventilation systems can be fully or partially switched off – while ensuring emission levels comply with stringent air quality requirements
  • Upgrading road lighting to LED or more efficient fluorescent luminaires

We are confident that realising these opportunities will allow us to meet, or exceed, our 10 per cent reduction target by the FY23 target year.

Green buildings

The design and fit-out of our head office in Melbourne prioritised energy efficiency. In 2016 the office originally received a 5-star NABERS Energy rating, representing ‘excellent’ energy efficiency.

Following lighting and electrical audits, further adjustments to the offices’ electrical wiring, automatic timer systems and sensor controls were made and in FY17 we were awarded a 5.5-star NABERS Energy rating. Compared to last year, our head office now uses almost 10 per cent less energy, despite employee numbers increasing by 12 per cent.

Renewable energy

To further reduce our grid energy use, we have installed renewable energy technology at some of our assets. This year we installed 23.4 kW of renewable capacity via solar panels at our Brandl St office (Brisbane) and at two Motorscapes sites (Melbourne and Sydney).

In total, we have installed 140 kW capacity across our network, including existing solar panels on the Eastern Distributor and Cross City Tunnel control centres. These renewable sources generated a combined 131 MWh of electricity on Transurban-managed assets during FY17.

The M5 Southwest, in which Transurban has a 50% equity interest and does not include in its energy performance targets, has an additional 30 kW of solar capacity and generated 48 MWh of solar electricity in FY17.

8) Energy figures exclude non-Transurban managed assets (M5 South West and Westlink M7).

UN Sustainable Development Goals relevant to this page