Long description

The figure includes a variety of photos illustrating systems involved in making a trip. Figure (a) shows a motorway junction with complicated looping lanes that enable cars to efficiently move from one road to another. Figure (b) shows a petrol station with cars positioned next to petrol pumps, and the kiosk in the background. Figure (c) shows a pedestrian crossing, identified by black and white stripes painted on the ground, and controlled by a set of traffic lights. Vehicles are stationary while a group of pedestrians cross, some on foot some on bicycles. Figure (d) shows a sheltered bus stop with various groups of commuters waiting for a bus. Bus timetables are apparent and one couple is using one to plan their journey. Figure (e) shows a GPS device attached to the windscreen of a vehicle.