A driver who is in a parked vehicle or travelling very slowly normally has a field of vision slightly wider than 150°.
At 100 km/h, the field of vision is reduced by half because the human brain can process only a limited amount of peripheral information.
The faster a vehicle is moving, the more information the brain receives. To cope, it eliminates a large amount of peripheral information.
A driver travelling at high speed may therefore not notice a child preparing to cross the street or an automobile emerging from an intersection.
