Fifteenth Avenue in Austral has no turning lanes, no deceleration zones, no space to overtake, a bungled roundabout, no traffic lights and ends in the middle of bushland.

And, yet, it is set to become one of western Sydney’s most important roads, connecting Liverpool to the new Western Sydney International Airport. It is intended to be central to greenfield areas where residential developments have become essential to easing the housing crisis.

Already, thousands of people have piled into the surrounding suburbs, transforming a once quiet semi-rural region on the edge of the city into a thrumming construction zone, filled with new developments, schools and businesses.

But the road itself has struggled to keep up.

The road’s plight has not been ignored by government, with the Albanese a

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