In order to make driving on Metropolitan Expressways safe, smooth and comfortable, from an early date, the traffic information system and equipment to present information to drivers have been expanded and upgraded, beginning with text information signs and continuing with the development and introduction of graphic information boards on a large-scale project such as is seen nowhere else in the world. In this paper, a summary and evaluation of graphic information boards is presented, the presentation of information in long tunnels, which will soon be part of the traffic scene in the Tokyo area, considered, and studies and measures for further ugrading the information sign system in order to effectively provide information through information signs presented. (A*)
Abstract