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Bang on TV
The team looks at some of the biggest travel nightmares. Liz investigates what causes traffic jams, whether lane switching works, and how to beat travel sickness. Meanwhile Jem heads for his workshop to build his own solution to traffic jams: a home-made, man-powered aeroplane.
Bang Goes The Theory can be seen on BBC One at 7:30pm (England, Scotland and Northern Ireland) and BBC Two at 8:00pm (Wales) on Monday 30 April. Full schedule and iPlayer links are on bbc.co.uk. Read more about the current series.