Methodology & data sources

How the Queensland Road Danger Map is built, what it includes, and how to cite it.

Source data

Every figure on this site is derived from Crash data from Queensland roads, published by the Queensland Department of Transport and Main Roads (TMR) on the Queensland Government open data portal, and used here under the Creative Commons Attribution 4.0 licence. The dataset records the location, date and severity of road crashes reported to police.

Time period

The map covers the last 10 years. Crashes from roughly the most recent 12 months are treated by TMR as preliminary while investigations are finalised, so the latest year may rise as records are completed.

What counts as a crash and a casualty

Only crashes involving a casualty are included — property-damage-only crashes are excluded. “People injured” counts every casualty across all severities (minor injury, medical treatment, hospitalisation and death). “Deaths” are the fatal subset.

How black spots are identified

Individual reported crashes are grouped into locations by rounding their coordinates to a fixed grid, so crashes at the same intersection or short stretch of road are counted together. A location is listed as a black spot only once it passes a minimum casualty threshold, so isolated single incidents are not overstated. Locations are ranked by a severity-weighted score that gives greater weight to more serious outcomes.

Updates

The site rebuilds automatically when TMR publishes a new release of the dataset, so the figures track the official data. Each page shows the date its data was last updated.

Limitations

These are reported crashes only; unreported crashes are not captured. Grid-based grouping is an approximation and may occasionally split or merge nearby locations. Rankings reflect where casualties have been recorded, not necessarily underlying risk per vehicle travelled.