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.
Science series. The team looks at some of the biggest travel nightmares, investigating what causes traffic jams, whether lane switching works, and how to beat travel sickness.
