Experiments were made to determine (1: the ways in which a vehicle driver uses his eyes when driving and the information he needs, and (2) the means by which this information is conveyed to him in various lighting systems, including daylight, on English ~ban highways and motorwayso The mechanism of seei~ in empty roads, medium traffio and heavy traffic have been elucidated, and the effectiveness of daylight, twilight and street lighting appraisedo Differences of driving requirements on the motorway and in urban roads were foundo It was concluded that vehicle lights were not capable of providing information necessary for safe driving on the motorway if an emergency ocours, but that fixed lighting wa capable of doing so. The necessary characteristios of this fixed lighting are discussed.
Abstract