These datasets have been collected and provided to us by Lothian Buses. They consist of Automatic Vehicle Location (AVL) data obtained using periodic GPS location measurements. Each data entry consists of a bus identifier, a location measurement and a measurement timestamp. The location data are given in Ordnance Survey for Great Britain (OSGB) eastings and northings rather than latitude/longitude coordinates. Each dataset contains information about Lothian Buses' full fleet of vehicles at the time, which from October 2014 onward includes Lothian Buses' fleet of trams (which have vehicle numbers ranging from 251 to 277). The main dataset covers the period between 28th January 2014 at 11:31:14 and 30th January 2014 at 12:38:31. Additionally, there are two related datasets covering selected days in October 2014 and January 2015.