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Research paper−162−Synthesiology - English edition Vol.4 No.3 pp.162-171 (Jan. 2012) Therefore, the United States started the R&D of satellite positioning, beacon, and route guidance system from the 1960s[1]. [Presence of example]In Japan, projects for traffic control and navigation were commenced by various agencies and ministries from the latter half of the 1970s. This kicked off the researches for the elemental technologies and the systems for navigation.The 1980s was an age when automobiles started to be controlled by electronics. High performance, downsizing and lightweight, and low cost were achieved in various fields (semiconductor and circuit, sensor, software, display, simulation, and other technologies) supported by the rapid development of electronic technologies. The application and diffusion of communication technology as well as the rapid development of satellite technology were also contributing factors. [Development of supporting technologies]The navigation started from the engineer’s dream of “making a device that will guide you to a destination that you are visiting for the first time”. The ideal is door-to-door navigation. Moreover, the user is not necessarily a highly trained driver or navigator like with ships or airplanes. In chapter 2, the changes in navigation as a commercial product will be explained according to the key phrases shown above in brackets [ ]. We shall also see how the technological issues shifted in the process of product realization. In chapter 3, how the technological issues were solved is explained. In 1 BackgroundThe number of automobile possession increased rapidly and the performance of automobiles improved dramatically in the 1970s. However, considering the matter from the aspect of transportation, the roads were insufficiently constructed in terms of both quality and quantity, the networks were incomplete, the street signs were sparse and difficult to read, and the commercially available roadmaps were crude. A driver was met with considerable challenge when driving to an unfamiliar destination due to the above factors, as well as due to the Japanese addresses centering on town names (unlike the street names being indicators in the United States and Europe).On the other hand, other than the instruments such as the speedometer that were mandatory for driving, the only equipment aboard a car was a clock and an AM radio, and navigation meant using the compass and the roadmap. [Presence of demand]The precursor of automotive navigation (herein after, will be called “navigation”) was the instrument used for marine and flight navigation. The navigation method is the identification of the current position and bearing. In the early days, this was accomplished by a sextant and a clock, and more recently by radio beacons. Since the travel range of an automobile is narrow and limited to roads, these methods were insufficient for automotive navigation.- Product development for realization of dreams and standardization for social acceptance-The automotive navigation system has been realized and has become popular along with the rapid development of electronic technology. The needs of people to reach destinations efficiently have pushed its development along with the projects of automotive development. Many vehicle-mounted technologies and many technologies supporting the navigation system such as communication and road data have been realized through many years of collaboration of powerful and innovative people among government, academia and industry. The technologies are to meet Intelligent Transportation Systems (ITS) international standards. Since the navigation interface system is an onboard device observed and operated during driving, securing safety, especially that related to human factors is an important issue. In this paper, the history of the development of the navigation system, research on human factors and standardization to enable social acceptance are described.Integrated development of automotive navigation and route guidance system Keywords : Navigation, route-guidance system, ITS, human factor [Translation from Synthesiology, Vol.4, No.3, p.157-165 (2011)]Hajime ItoTrust Tech Inc., Yokohama Office Yokohama Aioi-cho Building 2F, 6-104 Aioi-cho, Naka-ku, Yokohama 231-0012, Japan E-mail:Original manuscript received April 11, 2011, Revisions received August 22, 2011, Accepted August 25, 2011

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