Abstract: When the vehicle approaches an intersection, traffic signals located at the intersection are displayed on an intersection view, a traffic signal to be considered is displayed in a manner so as to be identifiable from the other traffic signals, arrows in the same directions as those of arrow signals for the traffic signal to be considered are displayed; and an arrow corresponding to an arrow signal permitting the vehicle to proceed in the direction of a guidance route is displayed in a manner so as to be identifiable from the other arrows.

Abstract: A system and method are disclosed for displaying map information on a portable computing device. When approaching a location at which maneuvering guidance is to be provided by the portable computing device, the portable computing device presents alternating images on a display screen. The alternating images include an overhead view map image and either a perspective view map image or a stylized image. The stylized image can be either a 2D image or a 3D image.

Abstract: In order to create a method for making available driving lane recommendations for each driving direction relating to at least one curb and interlinked with one another, as well as a system related thereto, which improve the quality of the driving instructions provided by a navigation device via optimized processing of the driving lanes on roads, in particular at intersections, it is recommended that (a) a curb (10, 11, 12; 10?, 12?, 15?) be assigned at least one lane list (20) whose elements (20.a.1.1, 20.a.1.2, 20.a.2) contain lane information on the totality of the driving lanes assigned to the curb (10, 11, 12; 10?, 12?, 15?); (b) each of the driving lanes be assigned at least one lane data list (30; 40) whose elements (30.b.1, 30.b.2; 40.b.1, 40.b.2) each contain lane data information on the particular driving lane; and (c) each follow-on driving lane succeeding the driving lane be assigned at least one follow-on lane list (50; 60; 70) whose elements (50.c.1, 50.c.2, 50.c.3, 50.c.4; 60.c.1, 60.c.2, 60. c.

Abstract: The present invention relates to a direction guide vibration system of a vehicle operating with a navigation and control method thereof, which applies vibration to a driver's seat on which a driver sits at the spot where a left turn or a right turn and a U turn are expected, on a path to move to a driver's intended destination, informs a driver thereof in advance for people and the hearing impaired using a navigation and informs the driver thereof before an enforcement area in which an over-speed camera is installed, thereby securing a safe driving of a vehicle.

Abstract: There is provided a vehicle navigation system and method for guiding path of a complex intersection more accurately. The method for guiding path of the complex intersection includes the steps of: configuring the complex intersection through a grouping based on a terminal sharing node and link extracted from a path searching data; performing a patterning to reconfigure the complex intersection; performing a map matching and a path following during a drive state based on a reconstructed data; and providing the followed path guidance information to a user.

Abstract: In an in-vehicle radio apparatus to radio-transmit information from a vehicle about to enter an intersection, the interference between a radio signal transmitted from the vehicle and a radio signal transmitted from another vehicle is suppressed. Further, an approach direction of the vehicle to the intersection can be accurately transmitted. In the radio apparatus to transmit a radio signal by using a spread spectrum method, it is determined that the vehicle has approached a first distance from the intersection, and based on the determination, a spread code corresponding to an approach direction of the vehicle to the intersection is allocated as a spread code used for transmission.

Abstract: A car navigation system changes from a normal guidance mode to a simplifying guidance mode when determining that part or all of sections in a guidance route is familiar or specific to an occupant. The simplifying guidance mode provides no audio guidance or simplified audio guidance with respect to route-related information compared to the normal guidance mode, while traffic-related information is provided using the same audio guidance as in the normal guidance mode.

Abstract: Techniques are provided for reducing the number of maneuvers presented in narrative driving directions for a route from an origin location to a destination location. Maneuvers are combined to reduce the number of maneuvers presented. Maneuvers may be combined based on a maneuver being associated with a highway interchange or maneuvers including a shared reference to a particular road.

Abstract: A display has a panel display unit with plural display screen portions arranged along a longitudinal direction of a vehicle body and providing an alarm display on a screen, a multistage display unit with reflecting mirrors inclined with respect to the screen portions and arranged at intervals along the longitudinal direction so as to respectively correspond with the screen portions and reflect the alarm display, and an alarm-distance obtaining unit for obtaining an alarm-distance between a present vehicle-position and an alarm-object position. The reflecting mirrors includes a most-rear reflecting mirror and at least one front reflecting mirror through which the alarm display can be seen. A multistage display control unit controls the display unit such that the alarm display is linked to the alarm-distance and provided in display-screen-portion order thereon so as to obtain a deep multistage alarm display.

Abstract: System and method for guiding a driver of a vehicle (20) from a starting point to a destination point using an assignment of levels of urgency of navigation cues. The system comprises a navigation unit (38), a controller (22) and a user interface (42). The navigation unit (38) is capable of selecting a route between the starting point and the destination point. The navigation unit (38) is further capable of generating a plurality of navigation cues to guide the driver along the selected route. The controller (22) is connected to the navigation unit (38) and receives navigation cues. The controller (22) has an urgency calculator (40) that is capable of assigning a level of urgency to the navigation cues. The controller (22) may also have a workload manager (60) that is capable of classifying an activity state of the driver as well as updating the level of urgency of the navigation cue. The user interface (42) presents the navigation cues based on the level of urgency of the navigation cues.

Abstract: A control system 20 for an automotive vehicle 22, such as an adaptive cruise control system, is provided including a navigation system 34. The navigation system 34 includes a global positioning system 38. The navigation system 34 detects a ramp and generates a navigation signal including navigation data and map data. A controller 24 is electrically coupled to the navigation system 34. The controller 24 in response to the navigation signal adjusts the speed of the vehicle 22.

Abstract: A navigation system suitable for use in a vehicle includes an interior rearview mirror assembly having an interior reflective element. A database at a site remote from the vehicle includes map data and/or directory data. A global-positioning system receiver is operable to receive signals from satellites external to said vehicles. A transceiver is operable to engage in a wireless communication with a remote transceiver located at a site remote from the vehicle to received data derived from the database. A user input allows a user to input a destination. The system responds to an input of a destination by wirelessly communicating the destination to the remote transceiver and downloading directions. A display that displays turn-by-turn instructions to the destination during the road journey based on the downloaded directions and on the signals received by the global-positioning system receiver. The turn-by-turn instructions may include (i) direction, (ii) when to turn, and/or (iii) how far until the turn.

Abstract: A preferred route may be determined from an origin location to a destination location. The preferred route avoids a particular maneuver or particular maneuvers identified by a user. The determination is made by processing directed links (e.g., one-way edges) in a graph that includes one or more links and two or more nodes. The determination of a preferred route may include an estimate of the time required at one or more intersections along alternative routes and/or an estimate of the time required to travel the alternative routes based on the day of the week or the day of the year in which travel occurs. Individual routing preferences, such as a preference of a rural over an urban route and avoiding particular maneuvers in a route, also may be considered.

Abstract: A navigation apparatus includes: a route search unit that obtains a route to take from a start point to a destination; a vehicle position detection unit that detects a vehicle position; and a route guidance unit that provides route guidance based upon the obtained route. And the route guidance unit displays the route within a predetermined range from the vehicle position as a straight bar together with the vehicle position, displays an intersection indicator on the straight bar in correspondence to an intersection present within the predetermined range on the route and varies display mode when displaying the intersection indicator depending upon whether the intersection is a guidance-requiring intersection at which the route guidance is provided or a non-guidance intersection at which the route guidance is not provided.

Abstract: A vehicle navigation system includes a road-between-guidance-target-points configuration determining unit (9) for determining a configuration of a road between two successive guidance target points whose information is extracted from information stored in a guidance target point storing unit (8). A continuous guidance threshold distance setting unit (10) sets a threshold distance for continuous guidance based on the road configuration by using a table or the like. A distance-between-guidance-target-points calculating unit (11) calculates a distance between the two successive guidance target points. When the calculated distance between the two successive guidance target points is shorter than the set threshold distance for continuous guidance, a route guidance unit (12) provides continuous guidance for users through a guidance unit (16).

Abstract: A vehicle navigation system includes a road-between-guidance-target-points configuration determining unit (9) for determining a configuration of a road between two successive guidance target points whose information is extracted from information stored in a guidance target point storing unit (8). A continuous guidance threshold distance setting unit (10) sets a threshold distance for continuous guidance based on the road configuration by using a table or the like. A distance-between-guidance-target-points calculating unit (11) calculates a distance between the two successive guidance target points. When the calculated distance between the two successive guidance target points is shorter than the set threshold distance for continuous guidance, a route guidance unit (12) provides continuous guidance for users through a guidance unit (16).

Abstract: Techniques are provided for reducing the number of maneuvers presented in narrative driving directions for a route from an origin location to a destination location. Maneuvers are combined to reduce the number of maneuvers presented. Maneuvers may be combined based on a maneuver being associated with a highway interchange or maneuvers including a shared reference to a particular road.

Abstract: To perform provision of information which allows a driver to generally know events which a vehicle is about to reach, and which calls the driver's attention to the events. A computer 14 controls a display apparatus 16 so as to display symbols, which corresponding to all events existing between a position of a vehicle and an end position of a service section, among events existing in the service section as first display object symbols in a first display area. In addition, the computer 14 controls the display apparatus 16 so as to display, synchronizing timing with the vehicle reaching a position corresponding to the calculated display timing, symbols corresponding to the display timing as second display object symbols in a second display area in a display size larger than a display size of the first display object symbols.

Abstract: In order to simplify the setting of interchanges for getting on and off, a navigation system has an information retrieval processing unit for obtaining map data and interchanges for getting on and off, a display unit which displays a setup screen for displaying a map including the interchanges for getting on and off and, on the same screen, a simple road chart including neighboring interchanges for getting on and off. When the map is scrolled, the simple road chart is renewed so as to correspond to the area to which the map is scrolled, and the setting of the interchanges for getting on and off is simplified.

Abstract: A satellite broadcasting system is disclosed wherein, when a broadcasting program is broadcast by satellite broadcasting, each viewer can receive a different broadcasting program depending upon the district in which the viewer is present. A broadcasting program is composed of an area designation part in which a list of areas in which the broadcasting program is to be broadcast is accommodated and broadcasting contents themselves. The broadcasting program is received by a radio wave reception section. A current position acquisition section detects the current position of a receiver. The current position is compared with an area to physical district coordination table and converted into an area name by a current area detection section.

Abstract: A navigation apparatus defines the route of movement from the current location to the destination on the basis of map information. It acquires road information relating to characteristics of the current road on which the vehicle is running and those of each of the branch roads extending from the fork located ahead of the current road by way of road information acquiring section 21. The acquired road information is collated with the requirement information stored in requirement information storage section 22 and the number of points correlated with the requirement that is met or not met are added or subtracted, whichever appropriate, to determine the total number of points by the agreement judging section 23. If the total number of points is greater than a threshold value, the navigation apparatus judges that the vehicle may not divert from the route of movement and restricts or suppresses guidance for driving the vehicle provided by guidance notification section 18.

Abstract: An arrival detection method for automatically detecting arrival of a current destination based on various conditions and proceeding to route guidance for the next destination when two or more destinations are specified. The method includes the steps of guiding a vehicle of the user to a current destination, detecting whether a current vehicle position is within a predetermined distance from the current destination, applying a primary condition when the vehicle is within the predetermined distance, applying a secondary condition when the primary condition is met, and determining arrival at the current destination when the secondary condition is met and proceeding to a route guidance operation for the next destination. The primary condition is a time length during which the vehicle is stationary within the predetermined distance from the current destination.

Abstract: An information center generates packets of route guidance information, each corresponding to a prescribed road length of a recommended route. The information center may generate major guide point information and guidance information and transmit both to a vehicular apparatus. The vehicular apparatus provides guidance only for major guide points based on the received major guide point information if it cannot receive the guidance information. According to another aspect of the invention, if the end of a route segment which was the subject of the preceding route guidance information is on an expressway or toll road, guidance information for a preliminary route from that end to an escape position ahead on the expressway or toll road is first transmitted and then information for a remaining route, that is a segment of the recommended route having the prescribed road length minus the preliminary route, is then transmitted.

Abstract: Systems, devices and methods are provided for an improved navigational route planning device which provides clear and concise guidance through decision points along a route by providing assistance that is more understandable, accurate and timely. One aspect provided herein is an electronic navigational aid device with voice guidance. The device includes a processor and a memory adapted to communicate to the processor. The memory is adapted to store cartographic data and a route to a desired destination. The device processes travel along the route, recognizes when the device is approaching a decision point in the route, and provides voice guidance for the decision point. According to one embodiment, the voice guidance includes an initial voice guidance, an advance voice guidance, and a confirmation voice guidance. Other aspects are provided herein.

Abstract: A navigation device is provided for easily designating a road to be avoided with high accuracy. When a location on a map is designated by a touch panel 7, an avoidance-road setting unit 22 identifies a road existing at or near the location designated, and specifies a link corresponding to the road. Then a map drawing unit 14 draws a map image in a reduced scale larger than that previously set. If another location on the map is designated, the process of specifying the link and the process of drawing the map image in the larger reduced scale, which are described above, are repeated. When there is provided an instruction to set the road specified based on the location as an avoidance road, the avoidance-road setting unit 22 stores a link ID of the link corresponding to the specified road in an avoidance-road memory 24.

Abstract: A method and a device for recording the curve of information. The information is scanned using a specifiable scanning period. The information is specifically the operating data of a motor vehicle. The scanned information is subjected to a data reduction, and then the reduced information is stored. To record the curve of relevant digital information, in particular, of the operating data of a motor vehicle, so as to use the least possible storage space, it is proposed that, in the context of the data reduction, the curve of the scanned information be viewed in a time raster of a multiple of the scanning period, and, within the individual raster increments, at least one characteristic variable of the curve of the scanned information be determined. The device is advantageously a component part of a control device for controlling/regulating specific motor-vehicle components or of an operating- or accident-data recorder of a motor vehicle.

Abstract: Systems, devices and methods are provided for an improved navigational route planning device which provides more understandable, accurate and timely information for negotiating a decision point along a route. The navigational aid device includes a processor adapted to communicate with a memory. The memory has cartographic data and a route to a desired destination stored therein. The cartographic data includes data indicative of thoroughfares of a plurality of types. A display is provided which is adapted to communicate with the processor and the memory and which is capable of displaying the cartographic data. The device processes travel along the route. The device recognizes when the device is approaching a decision point in the route and provides to the display an overlay screen on top of any presently displayed screen, the overlay screen adapted to display a preview of a decision point.

Abstract: A display method and apparatus for a navigation system for receiving traffic information and displaying traffic incidents in a manner easily and quickly comprehensible by a user of the navigation system. The navigation system applies various criteria to the traffic incidents and the route to the destination and determines an order of displaying the traffic incidents in accordance with the degrees of severity to the driving to the intended or calculated route to the destination. In other aspect, instead of assigning the listing order, colors are assigned to the traffic incident icons based on the degrees of severity.

Abstract: A method of providing a gesticulating anthropomorphic interface in a vehicle, the method comprising receiving driver input data including a function to be performed. The method also comprises receiving vehicle data corresponding to the function. The function is executed in response to the driver input data and the vehicle data and the executing results in output data. The output data is translated into a command for a gesticulating anthropomorphic figure. The gesticulating anthropomorphic figure is displayed making a gesture responsive to the command.

Abstract: A communication navigation system includes a server that transmits route guidance information to terminal units via a communication network, and a transmitter/receiver, provided in each terminal unit, for transmitting specification data that specifies a type of necessary route guidance information, to the server via the communication network. The server transmits only the route guidance information of the type specified by the specification data, to the terminal unit.

Abstract: A navigation apparatus is configured to generate display data of a rough route map extracting only information, which satisfies a display condition, when the display condition is set for the rough route map. For example, when a display condition for displaying a rough route map regarding only a main road is set, display data is generated for the rough route map regarding only the main road.

Abstract: A vehicle navigation system includes a road-between-guidance-target-points configuration determining unit (9) for determining a configuration of a road between two successive guidance target points whose information is extracted from information stored in a guidance target point storing unit (8). A continuous guidance threshold distance setting unit (10) sets a threshold distance for continuous guidance based on the road configuration by using a table or the like. A distance-between-guidance-target-points calculating unit (11) calculates a distance between the two successive guidance target points. When the calculated distance between the two successive guidance target points is shorter than the set threshold distance for continuous guidance, a route guidance unit (12) provides continuous guidance for users through a guidance unit (16).

Abstract: A communication navigation system includes a server that transmits items of route guidance information to terminal units via a communication network such as the Internet, a processing subsystem, provided in each terminal unit, for determining whether or not the items of route guidance information from the server are necessary, a display subsystem for performing guidance using only one or more items of route guidance information determined to be necessary by the processing subsystem, and a speech output subsystem.

Abstract: A car navigation system searches for a route from a start point to a destination, and provides guidance along the route. The car navigation system includes a trifurcate guidance section that makes a decision of considering two consecutive bifurcate guidance nodes among guidance nodes stored in a guidance node storing section as a single trifurcate guidance node, and makes a decision of a guidance direction to be provided as trifurcate guidance. The trifurcate guidance section provides the trifurcate guidance at the single trifurcate guidance node via a guidance section. The car navigation system can provide the guidance indicating a driver the way to proceed plainly, when two successive bifurcate intersections are present in a short distance.

Abstract: A feature guidance information that provides guidance on a feature has a data structure where a unique information representing a feature position and a guidance position are associated with respective sub-areas so that each sub-area includes at most one of the feature and the guidance position to represent the feature or the guidance position. When it is recognized that a vehicle reaches a position indicated by the unique mesh information of the guidance position with respect to a current position of the vehicle, guidance on the feature corresponding to the guidance position is provided. Thus, an amount of information, load for sending/receiving data and processing can be largely decreased compared to that coordinates are used for representing the feature position and the guidance position of the feature guidance information, thereby providing smooth navigation.

Abstract: A display method and apparatus for navigation system for displaying a guidance map showing appropriate number of upcoming and subsequent turns on the route to the destination with an appropriate and enlarged display size. The guidance map includes a highlighted route indicating the directions of turns. The navigation system applies various test conditions to the geometry of the streets to determine the number of turns to be displayed. Then, the navigation system enlarges the guidance map so that the map covers the area that can show the adjusted number of turns and the streets at the maximum size.

Abstract: A routing display for a navigation system in a road vehicle in the form of an electro-optical display can be driven by a routing computer and uses symbols to display a direction of current travel and a direction which is to be taken after a turn-off point relative to one another. The sizes of the two symbols relative to one another is changed such that the relative size of the symbol marking the direction which is to be taken after the turn-off point increases as the turn-off point is approached. Accordingly, when the driver looks at the routing display, he is given the visual impression that he is approaching the turn-off point.

Abstract: There is provided a system and method for controlling at least one traffic light having a vehicle having a transmitter and a receiver for transmitting and receiving traffic control signals, and a control unit for processing traffic control signals; and a traffic control module having a transmitter and a receiver for transmitting and receiving traffic control signals, a control unit for processing traffic control signals, traffic light control logic for controlling the at least one traffic light, and means to connect to the at least one traffic light; wherein the traffic control signals control the flow of traffic about the at least one traffic light enabling a vehicle to travel from a present location to a destination passing through intersections at which traffic flow is controlled by the at least one traffic light; and also including means for controlling at least one traffic light on a selected optimal route in response to the traffic control signals.

Abstract: In order to create a method for operating a navigation system and a navigation system for a vehicle, in particular for a motor vehicle, in which data regarding geographical positions of the vehicle are ascertained by a positioning system (20) and transmitted to a device for electronic data processing having access to a database (14) and a digital road map, and on the basis of those data the location of the vehicle on the digital road map is determined, and destination guidance instructions are outputted visually and/or acoustically to the driver of the vehicle, with which additional information can easily be stored in the navigation system and can be retrieved as necessary by the driver and/or by other persons in the vehicle and outputted via the navigation system, provision is made for additional information relevant for navigation to be loaded into the navigation system in the form of user programs which, as so-called “navlets” (30), are usable by the driver and/or by other persons present in th

Abstract: The present invention provides a navigation system configured to direct a person to a selected destination using information from an information carrying member.

Abstract: Monitoring is performed to determine whether or not the vehicle approaches a first point in a road where the vehicle turns right before a no-left-turn intersection for effectively entering and turning left at the no-left-turn intersection. When it is determined that the vehicle is close to the first point in the road, the direction in which the vehicle should travel from the first point in the road to a second point beyond the no-left-turn intersection is continuously indicated by an arrow in one enlarged view of the intersection.

Abstract: When one's vehicle goes into a road from outside the road, the direction of turning is indicated by guiding.

Abstract: A navigation system (20) having a service center (24) and a navigation unit (22) and a method of transmitting data to reduce the complexity of the navigation unit (22) and minimize the transmitted data. The navigation unit (22) transmits (202) a current location (or starting point (102)) and a desired destination (or destination point (104)). The service center (24) receives (204) the starting point and the destination point and selects (206) a route (100) between the two points. The service center (24) then generates (210, 212, 214) and transmits (216) data associated with a plurality of points on the selected route (100). These points may include items such as preparation points (140, 142, 144, 146), warning points (130, 132, 134, 136), instruction points (120, 122, 124, 126) and confirmation points (150, 152, 154, 156, 160, 162, 164, 166).

Abstract: A vehicle management system is disclosed to have GPS coordinates of a plurality of checkpoints of entrance gateways and exit gateways of a freeway stored in the memory of a vehicle. When a driver drives in an entrance gateway (or out of an exit gateway) of the freeway and an on-vehicle processor of the vehicle compares the current GPS coordinates of the vehicle to be matched with GPS coordinates of one entrance (exit) checkpoint stored in the memory, the on-vehicle processor controls a wireless communication device to wirelessly send the code number of the corresponding entrance (exit) and the license number of the vehicle to a remote control center for log-in (log-out). According to the log-in/log-out data, the control center can control the traffic volume, electronic toll collection, stolen car tracking, or motorcade, . . . and etc. of the freeway.

Abstract: A faceplate including an antenna for receiving navigation signals, a processor electrically coupled to the antenna for determining a position, a display electrically coupled to the processor for displaying navigation information, and at least one input arrangement. The faceplate able to be installed on a front side of a vehicular electronic unit in a dashboard of a vehicle. The at least one input arrangement controlling the vehicular electronic unit when the faceplate is received on the front side of the vehicular electronic unit. A system for navigating including a handheld unit. The handheld unit includes an antenna, a processor electrically coupled to the antenna, and a display electrically coupled to the processor. A further antenna is situated on a vehicle and a receptacle is situated in a dashboard of the vehicle for receiving the handheld unit. The receptacle electrically couples the further antenna to the handheld unit when the handheld unit is received in the receptacle.

Abstract: A vehicular navigation system is provided that includes a vehicular wireless communication system that comprises a global-positioning system receiver in a vehicle, the global-positioning system receiver operable to receive data indicative of the geographic position of the vehicle from satellites external to the vehicle. The vehicular wireless communication system includes a wireless communication link between a transceiver in the vehicle and a transceiver at a site remote from the vehicle whereby wireless communication can exist between the vehicular transceiver and the remote transceiver. The vehicular wireless communication system is responsive to the request by downloading to the vehicle turn-by-turn directions generally from the current location to the destination, the turn-by-turn directions being derived from a database and a display in the vehicle, preferably at the interior rearview mirror assembly, displaying turn-by-turn instructions to the driver of the vehicle.

Abstract: When a moving body (e.g., a car) is entering a roundabout, a navigation machine extracts link data of the roundabout from road map data. The navigation machine detects a route entering the roundabout (i.e., a route the moving body is currently taking), a center of the roundabout, and an exiting route based on the link data to determine an angle of the exiting route with respect to the entering route. A direction mark having the exiting route angle is prepared as a heading direction guidance image. The navigation machine can show an appropriate route (direction) at the roundabout without increasing the amount of stored image data.

Abstract: The invention provides a method of determining vehicle navigation instructions to a destination from a closest main street intersection or freeway exit. A database consisting of latitude/longitude coordinates may be searched for the locations of the destination, all street intersections within a first radius of the destination, and all freeway exits within a second radius of the destination.

Abstract: The invention provides a method and system for providing route guidance and other information from a base unit to a remote unit in response to a request from the remote unit. A query is formatted at the remote unit, the query including the request, and is transmitted from the remote unit to the base unit. Requested route guidance information is calculated at the base unit in response to the query, using a large up-to-date database located at the base unit. A response to the query is formatted at the base unit, the response including route guidance information. The response is then transmitted from the base unit to the remote unit for display. The transmission is made in a compact form through the use of maneuver arms and combined maneuver arms and through the use of tokenized forms. A maneuver arm represents a road at an intersection, for depiction on a display, by one or two endpoint coordinates.

Abstract: The invention provides a method and system for providing route guidance and other information from a base unit to a remote unit in response to a request from the remote unit. A query is formatted at the remote unit, the query including the request, and is transmitted from the remote unit to the base unit. Requested route guidance information is calculated at the base unit in response to the query, using a large up-to-date database located at the base unit. A response to the query is formatted at the base unit, the response including route guidance information. The response is then transmitted from the base unit to the remote unit for display. The transmission is made in a compact form through the use of maneuver arms and combined maneuver arms and through the use of tokenized forms. A maneuver arm represents a road at an intersection, for depiction on a display, by one or two endpoint coordinates.