AS/NZS 2890.1:2004 specifies that appropriate warning devices such as flexible striker bars, Height Bars shall be provided in conjunction with the minimum available clearance signage (rounded down to the nearest 0.1 m.) at all entrances if the clearance shown on the signs is less than 2.3m. Height bars should be installed at locations where vehicles first enter an undercover area or encounter an overhead obstruction,
Low clearance signs shall be used where the clearance, in either case, is: (i) 3 metres or less if only cars or light vans are likely to use the facility or (ii) 4.6 metres or less in all other areas.
The low clearance sign must be of BLACK text on the WHITE background.
