Australia Disability Standards for Accessible Public Transport 2002 4: Passing areas: 1800 mm wide to clause 3.4 of AS 1428.1 (2021) and at least every 6 m on a two-way access path narrower than 1800 mm (not on aerobridges); at least one passing area per accessible deck of a ferry or accessible rail car of a train carrying more than one wheelchair

What does 4 require?

A passing area in premises and infrastructure must be at least 1800 mm wide in accordance with clause 3.4 of AS 1428.1 (2021), and must be provided at least every 6 metres along any two-way access path narrower than 1800 mm in accordance with clause 6.5(b) of AS 1428.2 (1992) and its Figure 3; an aerobridge needs none. A ferry designed to carry more than one wheelchair must have a passing area on each accessible deck and a train so designed one in each accessible rail car; the area must let passengers travelling in mobility aids pass one another and may be formed from part of the allocated space or circulation space or both.