Information is also transmitted by transmitter towers located throughout Japan, identified with a 'Beacon Light' located on main urban roads.
Information received to vehicles installed with Internavi technology are installed with an antenna externally installed. The plotted course is then modified based on new information received to adjust travel time information, to include inter-city motorway links. Under normal navigation conditions, FM-multiplex broadcast VICS will prompt when specific conditions become aware, such as traffic congestion. If cellphone service connection is lost, information will be updated as the connection is reestablished. As travel begins towards the destination, any updated conditions are instantly relayed to the vehicle in real time. The identified route also takes into consideration all currently known traffic and local transportation issues that may affect the plotted course from the VICS center, which is updated every five minutes based on reports from various sources. The navigation technology interface connects to the server automatically at the Internavi Information Center, calculations and route planning is then determined towards establishing the quickest route towards the selected destination. Once connected, one of the services available is route calculations towards a specific destination. The technology is dependent on the user's cell phone service, and uses the data download plan associated with the users account.
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