Supply format

OS MasterMap Highways Network with Average Speed is available in CSV file format only. The CSV file will be supplied with headers and information detailed in the attributes described in the OS MasterMap Highways Network with Average Speed page. The data is provided zipped as single file(.zip). Data is provided as full supply only and is refreshed annually (in May).

OS MasterMap Highways Network with Speed Limits is available in shapefile format only. The data is provided zipped as single file(.zip). Data is provided as full supply only and is refreshed quarterly (in April, July, October and January).