Legal Speed Limits on Western Australian State and Local Roads

Weekly updated GIS data from Main Roads Western Australia shows legal speed limits on public access roads. The layer is sourced from the Integrated Road Information System (IRIS) and is provided for informational purposes only.

Use Cases

• Map speed limit zones using the 'Panel_01_design_meaning' attribute to filter for speed-related signage.
• Analyze road network regulation by integrating speed limit data with other road asset layers.
• Study spatial distribution of regulatory signs across the Western Australian road network.

Strengths

• Weekly update frequency triggered by changes in the source IRIS data.
• Multiple accessible file formats including GEOJSON, CSV, and ArcGIS REST API.
• Clear attribution to the authoritative source, Main Roads Western Australia.

Limitations

• Data may not be current or accurate; the only enforceable source is the physical road sign.
• Not recommended for use in navigation systems or applications requiring real-time data.
• Specific row counts, column counts, and sample data are unavailable for review.

Provenance

Source

Main Roads Western Australia, Commissioner of Main Roads.

Collection Method

Sourced from the Integrated Road Information System (IRIS).

Time Range

null

Freshness

Weekly updates.

Geography

Western Australia, state and local roads.