Kestryl Obstruction Index · Australia

Billboard obstruction in Australia

Australia runs roughly 10,000 large-format panels, and Kestryl's modelling estimates around 6 to 8% of them, some 600 to 700 panels, become obstructed every year, an estimate anchored to measured Melbourne pilot data. Kestryl has mapped or screened more than 2,000 panels across metropolitan Melbourne from aerial passes, with full ray-cast scores published for the 48-face pilot. Eucalypt and plane-tree growth along arterial corridors makes Australian panels some of the fastest to lose visibility between maintenance cycles, and most metropolitan trees sit under some form of planning control, so pruning lead times decide how quickly a closing sightline can be fixed. Kestryl attaches overlay status to every tree it scores in Victoria.

Large-format panels: ~10,000
Obstructed annually: 600–700
Annual rate: 6–8%

Obstruction rate by city in Australia, Melbourne pilot
City	Index	Panels surveyed	Trend
Melbourne	47.9%	48	Pilot · 2024-25

Melbourne figures are measured values from the Kestryl pilot: 23 of 48 deep-scored panel faces showed obstruction of 10% or more of the face at the worst viewpoint. The 2,000+ count covers panels mapped or screened from aerial capture; deep-scored results are reviewed before publication. National rates are modelled estimates, extrapolated from measured pilot data and cross-checked against aggregated industry data. Methodology: how the Index is built.

Figures are drawn from Kestryl's survey findings, Kestryl's obstruction modelling and aggregated industry data. Methodology

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