Main Roads Act 1930

Where in the opinion of the Commissioner —

a highway or main road, or part of a highway or main road, has become unsafe for traffic generally or traffic of any particular class; or

a highway or main road, or part of a highway or main road, would be damaged by the passage of traffic generally or traffic of any particular class;

The Commissioner must not cause a highway or main road, or part of a highway or main road, to be closed for any period of more than 28 consecutive days or for periods aggregating more than 28 days in the space of one year, unless the approval of the Minister has first been obtained but may with that approval authorise the closure for any greater period or periods.

Where a highway or main road, or part of a highway or main road, is closed under this provision, the Commissioner must cause signs to be erected at each end of that highway, main road or part, and a person who, without the authority of the Commissioner, interferes with any such sign commits an offence.

A person who, without the authority of the Commissioner, drives a vehicle or causes a vehicle to be driven on a highway or main road, or part of a highway or main road, that is closed to traffic generally, or drives a vehicle of any class or causes a vehicle of any class to be driven on a highway or main road, or part of a highway or main road, that is closed to that class of vehicle, commits an offence.