Legal Speed Limit (State and Local Roads)The maximum speed limit permitted under the provisions of the State Traffic Act and Regulations. Road speed limits are used to regulate the speed of vehicles and may define maximum (which may be variable), minimum, or no speed limit. These limits are indicated using traffic signs.Speed limits are set by the Commissioner of Main Roads Western Australia (Regulation 297 of the Road Traffic Code 2000) and enforced by national or regional police and/or judicial bodies. The speed limit displayed in this layer may not be current or accurate. The only enforceable source of speed limits is the road sign at the relevant physical location.Update FrequencyUpdates to the ArcGIS layer are triggered by changes in IRIS data and refreshed weekly.DisclaimerThis layer shows the location of legal speed limits on all public access roads included in the Integrated Road Information System (IRIS) and is provided for informational purposes only.Please note that you are accessing this data under a Creative Commons Attribution Licence, which includes a disclaimer of warranties and a limitation of liability. You acknowledge that the data provided under this licence is subject to change and may not be current or accurate. The only enforceable source of speed limits is the road sign at the relevant physical location.Important Usage NoticeWhile this dataset may be used under the terms of the Creative Commons Licence, Main Roads WA does not recommend its use in navigation systems or applications requiring real-time or precise speed limit data. The dataset is not maintained for operational purposes and may not reflect current or signed speed limits. Main Roads WA is not liable for the use of this data, including in navigation or compliance tools.Licence NoticePursuant to Section 3 of the Licence, you are provided with the following notice to include when sharing the licensed material:The Commissioner of Main Roads is the creator and owner of the data and licensed material, which is accessed under a Creative Commons Attribution Licence. This licence includes a disclaimer of warranties and a limitation of liability. The data may not be current or accurate. The only enforceable source of speed limits is the road sign at the relevant physical location.LicenceCreative Commons CC BY 4.0https://creativecommons.org/licenses/by/4.0/Data Domain StewardData Planning and Standards ManagerData CustodianData and Systems ManagerOperational Data StewardData Planning and Standards ManagerCoordinate System TypeGeographic (unprojected, EPSG:4283 – GDA94)ReferencesSigns – Regulatoryhttps://portal-mainroads.opendata.arcgis.com/datasets/3768b2d6a8fe4e3fa9c8b53197ba3b5e_22/To explore the meaning of regulatory signs, refer to the Panel_01_design_meaning attribute.For speed-related signage, filter or search this attribute using the keyword "speed".
