Underground travelator. Travellers using a moving pavement (or travelator) to move between distant parts of an underground train station. This is the travelator at London Underground's Waterloo tube station, London, England. The travelator is 140 metres long, connecting the Northern and Bakerloo line platforms with the Jubilee line platforms. Waterloo's Jubilee line station opened in November 1999. This travelator was the second one to be built on the Underground.