Geotechnical drilling has begun for the Melbourne Airport Rail link, with investigations at six sites around the M80 Ring Road in Tullamarine and near the Maribyrnong River. Boreholes will be drilled up to 25 centimetres in diameter and 45 metres deep to collect the samples, each taking about two weeks to complete.

These works will identify the ground conditions and soil quality to inform the design of the new rail line and how it will be built. Additional testing will also be undertaken later this year.

Construction of the Melbourne Airport Rail Link is scheduled to begin in 2022 and is expected to take up to nine years to complete.