Camden police crime manager Paul Albury said the boy was crossing from the Mount Annan side to the Narellan side of the bypass when he was hit by a Ford sedan driven by a Lakesland man, 20.

The boy suffered a fractured ankle and soft tissue damage to his torso, he said.

``On this occasion the 15-year-old was very lucky,'' Detective Inspector Albury said.

``However, vehicles travelling at speed (100km/h) will in most cases lead to people being killed in these types of accidents.''