You took it back to a drop-off point.
The GPS unit on the bike knows when you lock it within 25m (or thereabouts) of a drop-off point, and if you lock it away from a drop-off point then it can assume you're running errands.
@Velocio started
London Fixed Gear and Single-Speed is a community of fixed gear and single-speed cyclists.
You took it back to a drop-off point.
The GPS unit on the bike knows when you lock it within 25m (or thereabouts) of a drop-off point, and if you lock it away from a drop-off point then it can assume you're running errands.