In one test participants in a car at a junction attempted to cross a lane of oncoming traffic.

The number of mistakes, including late braking or crossing the lane line, were counted each time and compared.

They were crossing the lane yesterday morning quite early, leaping with ease over barbed wire fences and relaxed as you please, staring at me with something little short of insolence.

Passengers must cross the lanes used by buses, baggage carts and other vehicles in order to reach the aircraft.

The runners then crossed the lane again, jumping a fence as they did so which they had not jumped on the first circuit to set off on the second circuit.