Criminal Code Act 1983

Any person who, with intent to injure or to endanger the safety of any person travelling by railway or roadway, whether a particular person or not:

deals with the railway or roadway, any railway engine or carriage or motor vehicle or with anything upon or near the railway or roadway in such a manner as to affect or endanger or be likely to affect or endanger the free and safe use of the railway or roadway or the safety of any such person;

shows any light or signal or sign, or in any way deals with any existing light or signal or sign, upon or near the railway or roadway; or

by an omission to do any act that it is his duty to do causes the safety of any such person to be endangered,

is guilty of an offence and is liable to imprisonment for life.