The Average and Indicative Speed feature type provides two sets of speed information for all roads in Great Britain. These are: A historic average speed in kilometres per hours (kph). In this context, 'historic' means that the average speed data was collected over a six-month period for the selected road link. Average speeds are provided in different time periods for each road link. A single day (i.e. a 24-hour period) is split into 8 time periods Monday to Friday (MF) and 6 time periods Saturday to Sunday (SS), for example, Monday–Friday (MF) 07:00–09:00, Saturday–Sunday (SS) 14:00–19:00. There’s a separate attribute for each time period. And an indicative speed limit. This is an indication of the maximum speed limit for vehicles; the indicative speed limits reference road network data. Indicative speed limit values that apply over the majority of a section of road are provided in both miles per hour (mph) and kilometres per hour (kph).