Austral development near Western Sydney Airport has transformed Liverpool into a commuter nightmare

One of Australia’s fastest-growing suburbs is caught in a development dilemma where the surging construction of homes is swamping local roads.

The problem at Austral, 42 kilometres south-west of Sydney, has become so dire that some drivers are swerving onto the wrong side of the road to avoid bottlenecks, which locals say add 30 minutes to a peak-hour commute.

About 30,000 homes are being built in the suburb, with the finishing touches being put on roughly 100 each week.

Dozens of property developers are overseeing the project,…