FR2760282A1 - Dynamic on-board guidance and navigation system for motor vehicles - Google Patents

Abstract

The dynamic system comprises determination of instantaneous position, routing between two points on a road network consistent with a chosen itinerary, and guidance between the two points by visual, text-based or graphical means. The database, on which the routing is based, is made up of data arising from received traffic information which are converted into objects that can be used in conjunction with data from a geographical database which includes coordinates, names of places, elements of the road network, road signs, graphical descriptions and direction indicators. The on-board vehicle guidance system comprises a receiver-decoder, a man machine interface e.g. alphanumeric screen or voice synthesis module, a direction means, a memory e.g. card memory containing the static part of the traffic and navigation database, a vehicle locating device, and a processor or calculator for carrying out the necessary route calculations.

Description

METHOD AND SYSTEM FOR DYNAMIC GUIDANCE
FOR MOTOR VEHICLE.

The present invention relates to a method and a system for dynamic guidance of motor vehicles, which is based on the road network filled with information on road traffic, consisting in particular by the databases broadcast by the RDS (Radio Data System) system. ) using a specific protocol called Traffic Message Channel (TMC). This protocol allows the dissemination of traffic information in digital form to onboard receivers on vehicles, communicating on the FM band. This protocol encompasses two different approaches, constituting future international standards, ALERT
Plus and ALERT C describing respectively the state of the road sections and the road problems that occur.

It aims to improve the mobility and safety of vehicles by simultaneously offering, in one and the same service, two applications based on information technologies: information on road traffic and guidance. This service may consist, not only in a road information system calculating routes, indicating the traffic situation of these routes and recalculating a new route, in case of congestion on one of them, but also in a system. guide capable of taking into account the information broadcast on the traffic to provide a dynamic guidance service.

Currently, the association between an existing guidance system, such as that described in the patent application filed on behalf of RENAULT under the number 96 00413, and a system for transmitting information on road traffic poses significant problems, in particular compatibility between the databases specific to these two types of applications, which have been developed separately.

The dynamic guidance of the Philips CARIN system, carried out in the framework of the European project SOCRATES by DRIVE II, has had limited success, in particular because of the difficulties of linking the databases according to the TMC-ALERT C traffic information protocol. navigation databases.

The solutions previously proposed to make interoperable these two databases of traffic information on the one hand, and navigation on the other hand, are intended to establish a bridge between these two bases, allowing for example to associate a road event affecting a network route segment serving as support for traffic information to a segment of the navigation network. The guidance and routing system continues to rely on a standard navigation database, provided for example by NavTech or TeleAtlas. On the other hand, the system database
TMC is only used for its original function of decoding the traffic information broadcast by the RDS system. The traffic information is then projected on the navigation database so that it can be taken into account, in the routing application, to determine the fastest route to get to a specific destination.

To couple these two incompatible databases, it is essential to make compromises that add inaccuracies visibly degrading the quality of traffic information for the user. For example, in the case of calculation by an electronic calculator of a route connecting two points, the computer uses a navigation database, some road sections are not in the traffic information database TMC established according to the TMC protocol, otherwise known as the TMC database in the rest of the text. On these sections precisely, the computer can not have travel time, unlike other sections also belonging to the navigation database for which he has this information. To obtain an overall journey time on the entire route, the calculator must make an estimate of travel times on the unspecified sections, which affects the quality of the road information service.

Another problem arises when a road section of the navigation database is informed in traffic information only on a portion of itself corresponding to one section of the TMC database, the other portion not supporting of information. The travel time of the entire road section can only be estimated, which alters the traffic information of the RDS-TMC system.

In order to set up a reliable and efficient road traffic information service in Europe, aimed at improving the safety and mobility of motor vehicles and heavy goods vehicles, a system must be in place. dynamic guidance system reliably using the information broadcast on the RDS-TMC system, whether
ALERT Plus or ALERT C, on road traffic.

This is what the invention proposes, whose principle is to optimize the movement of vehicles on the main network by taking into account the traffic information broadcast for the purposes of navigation according to several transformation rules. This main network consists of the TMC traffic information database, chosen by the network operators.

For this, a first object of the invention is a method of dynamic guidance of a motor vehicle, comprising determining the instantaneous position of the vehicle, its routing between two specific points of the road network of traffic consisting of a choice of route , and its guidance voice, text or graphic along this route, characterized in that the database constituting the main road traffic network is made from a database filled with traffic information, whose objects are transformed to become objects specific to the guidance and routing of the vehicle, and which is supplemented by attributes specific to the guidance and routing and constituted by the geographical coordinates and the names of the elements of the road network, the routing instructions , graphic descriptions and directions.

A second object of the invention is a guidance system implementing the method according to one of the preceding claims, embedded in the vehicle, characterized in that it consists of the following elements: - a receiver-decoder of traffic information - a human-machine interface based on a system of
visualization, such as an alphanumeric display or
graphic for example, or on a synthesis system
of words - means of designation - a memory medium, such as a memory card or card
chip containing the database of traffic and
navigation - a localization module - an electronic calculator, designed to manage the
previous elements and to perform in particular the
route calculations, identify the progress of the
vehicle along this route and select
guidance indications to be issued to the driver
of the vehicle.

Other features and advantages of the invention will appear on reading the description of a particular embodiment, illustrated by the following figures which are: FIG. 1: an example of a guide situation of a
vehicle traveling on a road section - Figure 2: an example of a representation of a
road network defined according to the rules of reference
TMC-ALERT Plus - Figure 3: an example of a representation of a
road network defined by the reference rules
TMC-ALERT C - Figure 4: a schematic diagram of a system of
dynamic guidance according to the invention.

The guidance of a motor vehicle is made from a navigation database, by voice instructions, textual or graphic that indicate the directional signs to follow and / or the coordinates (name and number) of the national road or departmental to borrow, and which also provide guidance routing in simple or complex intersections such as highway interchanges, large squares in city centers or tunnels for example. Graphically, the guidance uses a vignette representing a crossroad for example, and gives an indication of direction in the form of an arrow that points to the direction to follow at the exit of a junction, taking into account the orientation of the vehicle to guide . An example of a guidance system is described in the patent application filed under number 96 00413 already mentioned.

FIG. 1 is an example of a guiding situation of a vehicle traveling on a road section AB connecting the point A to the point B constituted by a junction, from which two other road sections BC and BD respectively leave, towards two points C and D. The vehicle wishes to reach point D. At a distance corresponding to a fixed number of meters from intersection B, voice messages are emitted and graphic or textual information appears on a screen located on the dashboard, which indicates the best way to negotiate the B junction to find yourself on the BD stretch.

Thus, a guidance system needs a navigation database consisting of points or intersections, such as A, B, C and D, oriented road segments such as AB, BC or BD, and routing information which are guidelines for all possible maneuvers, such as ABC, ABD or DBA and CBA at the B junction.

Such a navigation database forms a related network which is the image of the road network.

An example of a navigation database is given in the appendix, comprising three tables whose subject respectively are intersections, oriented segments and routing information. The attributes of a junction are the code number, its name, the X and Y geographic coordinates, and the radius of the junction. The attributes of an oriented segment are the code numbers of the intersection defining the beginning of the segment and the one defining the other end, the name of the axis carrying the segment, the length of the segment, the average speed of the vehicles on the segment, and in addition, the direction to take, the location of the panel, the road model, ie its shape, the characteristics of the road, the course or angle of exit and possibly the name of the whole of different model paths constituting an entity proper or oversteers, like the Francilienne in
Paris region, which serve for guidance. The third table indicates the attributes of a routing information, namely the current junction in question, the junctions preceding and following the latter, and for routing, an additional guidance message, the so-called transparent intersections, which the driver must must necessarily borrow and whose presence does not have to be reported to him, the vignettes, as well as the impossibilities of joining and prohibited.
Sometimes the vehicle is traveling on roads not belonging to the modeled network in the navigation database. In this case, the guidance system displays an arrow pointing to the network that must be reached, or pointing to the final destination, then performing guidance called "on the compass".

The TMC geographic databases are intended for road traffic information services, in particular those using the RDS-TMC radio channel, which offer an on-vehicle service by broadcasting digitized data and picked up by an antenna. The design of these databases
TMC aims to minimize the rate of transmitted information and to play a correspondence role between code numbers, which are broadcast, and the corresponding geographical locations, which are stored in the embedded system but are not broadcast. These geographical locations are for example the points of the road network defined by an entry and a motorway exit, a place, a vehicle counting point, a parking lot .... In the vehicle are thus stored the geographical positions on the road network, with their name, their coordinates, as well as information concerning events occurring on the road network. In the example of a stopper occurring at a junction, all the information on this stopper is not transmitted, but it is coded in the form of numbers, broadcast, and then decoded in the vehicle that receives it thanks to the databases. TMC, embedded in the vehicle and which match the coding numbers and actual information.

The RDS-TMC system can carry two types of information from two protocols. The first
TMC-ALERT Plus delivers quantitative information, obtained from measurements made by sensors placed on the road network, describing the state of the traffic on the road sections defined by its density or by the time necessary to traverse a section for example. The second TMC-ALERT C delivers qualitative information, describing the events occurring on the road sections, that is to say the problems such as accidents, traffic jams, with their location and duration.

The TMC-ALERT Plus protocol is particularly useful in urban and peri-urban areas, while the TMC-ALERT C protocol is especially suitable for interurban areas.

A database established according to the protocol
TMC-ALERT Plus is structured as a related network representing the road network, for a given geographical area, and taking into account the specificities of the information supported by this network.

There are three distinct types of elements, or localisers, constituting the road network, namely - points: intermediate points, access points to
a crossroads, points immersed in a pole - the oriented road segments: intrapolous sections
and interpoles, and links between two points
intermediate, one-way or two-way - the poles: road interchanges, intersections,
crossroads, geographical landmarks identifiable by the user.

FIG. 2 is an example of a representation of a network defined according to the TMC-ALERT Plus reference rules, in which the intrapole and interpole sections support travel times, while that the links support levels of fluidity of the traffic (stationary traffic, idle, fluid, ...).

The reference table corresponding to a TMC-ALERT Plus database, presented in the appendix, contains two entries where the localizers of the road network of the geographical area concerned are described horizontally by attributes that form the columns. Each localizer is identified by a code number, defined according to a type of object - interpole section, intrapole section, link, pole, access point, ... which may comprise one or two poles, each defined by its number. code, in the case of an interpole section or a path. The table mentions his name and that of his geographical area, as well as its length and the average speed of the vehicles. The access points are indicated by their code, as well as the ALERT C points, but these coordinates constitute optional fields of the table.

The TMC-ALERT C database is not structured as a related network. Each road axis is defined by a series of localisers, which are points of the road network mainly corresponding to intersections or interchanges, which are interconnected by references to consecutive locators, called "offset". However, there is no link between localizers belonging to two different name axes, as shown in Figure 3, which is an example of a road network representation defined by the TMC geographic reference rules
ALERT C. A traffic information message can be for example: accident in 56, causing a slowdown to 54, duration of the disturbance estimated at three quarters of an hour.

The TMC-ALERT C reference table, appended, also includes two entries where localizers of the road network, corresponding to a given geographical area, are described horizontally by a code number, the name of the axis on which they are located. as well as by the localising who precedes and follows him belonging to the same axis.

The dynamic guidance method according to the invention has the main characteristic of proposing a routing that realizes the choice of a vehicle path on the main traffic network defined by at least one TMC database, optimized path according to traffic information broadcast precisely on the RDS-TMC system.

The method also allows a rerouting function, i.e., recommends an alternative path when a road problem occurs on the guided vehicle path.

The method according to the invention also proposes, on the one hand, a function for guiding the motorist along the proposed route, by means of voice, textual or graphical indications, and on the other hand a road information function concerning the road traffic on the route he will take.

The TMC databases represent the network chosen by road managers to support traffic information, and on the one hand contain major strategic highways such as motorways, national roads, certain major departmental roads, and on the other hand, in urban areas, the expressways and the strategic network of the main streets.

The path optimization established by the method according to the invention is carried out optimally taking into account the traffic information broadcast on the TMC database, without adapting this information.

The guiding function itself on this network, informed by the traffic information of the system
RDS-TMC, is analogous to the guidance performed on a conventional navigation database, that is to say by voice, textual or graphical indications, consisting of instructions for traversing in intersections in the form of text, synthesis of speech and / or graphic vignettes. The indications may also consist of directional data and / or road names and numbers.

To carry out this dynamic guidance of motor vehicles from TMC databases, it is necessary to transform them by adding certain attributes necessary for routing and guidance and by modifying the objects.

So, in the example of a TMC-ALERT database
Moreover, the interpole sections become orientated segments for the guidance, as well as the intrapole sections. Access points and submerged points become hubs for guidance.

Although the intermediate points and the links are not necessary for the guidance method, they nevertheless make it possible to better document certain attributes for guidance, such as the shape of the road for example. The poles act as a bridge between TMC-ALERT Plus tables and navigation tables. It is then possible to obtain, for a database of the dynamic guidance method according to the invention, from a TMC database, three enriched tables, given in the appendix, concerning respectively oriented segments, intersections and tracking information.

The enriched table of the oriented segments is obtained from the interpolated and intrapolous sections of the TMC-ALERT Plus table, to which additional attributes specific to the guidance have been added, indicating the direction to be taken, the location of the panel with respect to the intersection, the road model and the characteristics of the road, the exit heading which is an information on the global direction to follow at a crossroads and the over-road. The boxes corresponding to these attributes and which are to be informed, are provided with a sign #. This table makes it possible to give a first guidance message, to be supplemented by information related to the routing in case of peculiarities of the route.

The enhanced intersection table is made up of access points from the TMC-ALERT Plus table, to which guidance attributes, such as the name of the intersection, the X and Y geographic coordinates relative to a placemark, and the radius of the intersection. , have been added. The treatment of immersed points may be similar to that of access points.

The enriched routing information table, which is guidance for additional guidance in case of particularities of the route, is established from the intersections defined in the previous table.

This routing information table has as attributes the current crossroads where the vehicle is located, as well as the previous crossroads from which it comes and the next crossroads where it goes, the additional guidance messages, in addition to the oriented segments to manage any peculiarity of guiding, the impossibilities of junction and the forbidden ways, the transparent intersections, and the vignettes which are the graphic descriptions of the crossroads.

In these last three tables, the boxes marked "#" are intended to be filled and those marked "-" correspond to an attribute that is not used for the object or location in question.

Transformation of TMC-ALERT C databases for routing and guidance purposes differs from transforming TMC-ALERT Plus databases because the data is not structured as a related network. However, a solution for transforming a TMC-ALERT C database into a related network is described in the French patent application filed under number 94 02500, concerning "a method and a device for selecting traffic information", and can be used so that it is then possible to enrich the database in a manner similar to what was previously described for TMC-ALERT Plus databases. The transformation rules, applying in particular to the TMC-ALERT C reference tables of the island of France currently existing and to the database of the guidance system described in the patent applications filed under the numbers 92 13006 and 96 00413 , are the following - two points, or localizers, consecutive from a TMC-ALERT C database form a segment oriented for guidance; - all points, or localisers, of a TMC-ALERT C database are crossroads for guidance.

These rules make it possible to perform a partially automatic transformation of the TMC-ALERT C tables in order to obtain the enriched tables of the intersections, oriented segments and routing information, appended to them, necessary for the dynamic guidance according to the invention.

Since the TMC-ALERT C database has localisers corresponding to intersections and exchangers, the intersections on the one hand and the oriented segments on the other, which are the objects specific to guidance and routing, are obtained. respectively from all the localisers belonging to the database entered, and from two consecutive localisers, one said starting and the other said arrival.

The enriched table of the oriented segments, given in the appendix, is obtained from the starting and ending localisers of the database entered, to which are added specific attributes to the guidance, which are the direction to be taken, the location of the sign relative to the intersection, the road model and the characteristics of the road, the exit heading which is an information on the global direction to follow at a crossroads, and the over-road.

The enriched crossroads table, also included in the appendix, is made up of the localisers of the database entered, to which guiding attributes, such as the geographical coordinates (X and Y) with respect to a marker and the radius of the junction, have been added.

The enriched table concerning routing information given to the motorist at the exit of a current intersection considered where the vehicle is located, whose orientation is taken into account, has for attributes the current intersection, as well as the previous crossroads of where it comes from and the next intersection where it goes, an additional guidance message, the impossibilities of junction and forbidden lanes, the vignettes which are the graphic descriptions of the junction and the transparent intersections.

When the route taken by the vehicle is not totally included in the network defined by the TMC database called the main network, and includes for example small streets or roads crossing inhabited areas, which are not traversed by lanes in transit on which traffic information is broadcast, additional routing and guidance phases are provided to join the TMC network.

On the part of the route not served by the traffic information broadcast by the RDS-TMC system and constituting a so-called secondary network, generally at the beginning and at the end of the journey, the method includes a "compass" guidance phase, possibly enriched by additional information. It can also include a complete guidance and routing phase based on a conventional navigation database, type "street-by-street" guidance.

According to an exemplary embodiment of a dynamic guidance, by the method according to the invention, of a vehicle at a point P0 located on the secondary network, not belonging to a TMC database and having to go to a point P1 also located on the secondary network, the method comprises a routing phase, or route calculation, comprising the following steps - determination of the points of the TMC database
closest to starting points P0 and arrival
P1 of the vehicle - assignment, from the starting point P0, of a
weight each way to join the
network, covered by information from the
RDS-TMC system, through the points of this
network closest to the starting point P0. This
weight is equivalent to a travel time and depends
the guidance mode used on the secondary network,
which can be of compass type or classic type to
from a classic navigation database
vector - assigning a weight to each possible path
connecting the most important main network points
close to the starting point P0 at the points of this same
network closest to the point of arrival P1. This
weight takes into account the nominal speeds
depending on the nature of the roads used,
but especially the traffic information broadcast by
the RDS-TMC system, which can be times of
course - assignment of a weight to each path allowing
connect the arrival point P1 to the points of the network
principal who are closest to him; - determination of the fastest route between the point
starting point Po and the point of arrival P1 by integrating
traffic information on the biggest part
of the journey, which corresponds to the main network. This
determination can be made by calculating all the
possible paths and the choice of the fastest.

The method also comprises a guiding phase comprising the following steps - between the starting point P0 and the main network of
the TMC database, compass guidance or
comprehensive guidance based on a database of
classic navigation, called "street by street" - guidance on the main network, by indications
voice, textual or graphic, consisting of
routing instructions in the intersections or
the directional signs data with names and
route numbers - compass guidance between the main network and the
point of arrival P1, possibly enriched by
additional information (guidance to address),
or classical guidance.

The method also includes a rerouting phase, provided in the following two cases - while traveling on the calculated route,
the motorist is wrong or leaves the paths
of the TMC database on which it is guided,
guiding and routing steps previously
described on the secondary network applying for
to join the main network - if a road problem occurs downstream of the
position of the vehicle on the route chosen by the
guidance system, an alternative path can be
proposed on the main network indicated. If, in
In addition, the system has a database of
classic navigation and no alternative route
acceptable is possible on the main network, a
hook by the secondary network can be offered at
driver to work around the problem.

The invention also relates to a system implementing the guidance method previously described and which is embedded in the vehicle. According to FIG. 4, this system consists of a receiver-decoder 1 of traffic information (of the current RDS type, or SWIFT,
DAB, GSM, future, ...), a human-machine interface 2 based on a visualization system, such as an alphanumeric or graphical display eg with a chip containing the common database of traffic and navigation data according to the invention, and a location module 5 of GPS type - "Global Positioning
System ", which can be associated with position estimation sensors, such as a gyrometer using the" map-matching "technique, that is to say resetting on a digital vector map. electronic calculator 6, which notably performs the route calculations, identifies the progression of the vehicle along this route and selects the guidance indications to be delivered to the driver.

The main advantages of the method according to the invention reside in the reliable use of the traffic information broadcast by the RDS-TMC system according to the ALERT C and ALERT Plus protocols for navigation purposes, without degradation of the broadcast traffic information, since there is only one database to manage. The maintenance work is significantly reduced, as well as the costs.

Since the sizes of the memories needed in the computer terminals are also reduced, the size of these computers can be reduced, which consequently becomes less expensive.

As these TMC databases are public and in the process of European CEN TC 278 standardization, they will shortly cover the main traffic lanes of the agglomerations and the main road axes in France and in Europe, which will allow the application of the guidance method. dynamic across Europe.

NAVIGATION DATABASE

<SEP> type of object <SEP> attributes
<tb> number <SEP> name <SEP> coordinate <SEP> coordinate <SEP> radius <SEP> crossroads
<tb> crossroads <SEP> X <SEP> Y
<Tb>

<SEP> type of object <SEP> attributes
<tb> Segment <SEP> Directed <SEP> Number <SEP> of <SEP> Number <SEP> of <SEP> Direction <SEP> at <SEP> Name <SEP> Length <SEP> Speed <SEP> Location <SEP <SEP> template <SEP><SEP><SEP><SEP><SEP> feature outlines
<tb> intersection <SEP> intersection <SEP> take <SEP> axis <SEP> panel <SEP> from <SEP> route <SEP> the <SEP> route
<tb> departure <SEP> arrival
<Tb>

<SEP> type of object <SEP> attributes
<tb> path <SEP> crossroads <SEP> crossroads <SEP> crossroads <SEP> message <SEP> crossroads <SEP> thumbnails <SEP> impossibilities <SEP> of
<tb> current <SEP> previous <SEP> next <SEP> additional <SEP> transparent <SEP> junction, <SEP> forbidden
<tb> mentary
<tb>
<tb> guiding
<tb> TABLE TMC-ALERT PLUS

number <SEP> type <SEP> of object <SEP> pole <SEP> 1 <SEP> pole <SEP> 2 <SEP> name <SEP> 1 <SEP> name <SEP> 2 <SEP> reference <SEP> length <SEP> speed <SEP> point <SEP> point <SEP> point <SEP> point
<tb> of object <SEP> (n object) <SEP> (n object) <SEP> (text) <SEP> (text) <SEP> (text) <SEP> (meters) <SEP> (km / h) <SEP> Access <SEP> 1 <SEP> Access <SEP> 2 <SEP> ALERT <SEP> C <SEP> 1 <SEP> ALERT <SEP> C <SEP> 2
<tb> (n object) <SEP> (n object) <SEP> (n loc) <SEP> (n loc)
<tb> 12560 <SEP> section <SEP> pole <SEP> origin <SEP> pole <SEP> end <SEP> channel <SEP> main <SEP> department <SEP> yes <SEP> yes <SEP> point <SEP > origin <SEP> point <SEP> point <SEP> origin <SEP> period
<tb> interpolates <SEP> or <SEP> common <SEP> end <SEP> end
<tb> 13987 <SEP> stub <SEP> pole <SEP> ~ <SEP> pole <SEP> ~ <SEP> department <SEP> yes <SEP> yes <SEP> point <SEP> origin <SEP> point <SEP > pole <SEP> ~
<tb> intrapole <SEP> or <SEP> common <SEP> end
<tb> link <SEP> ~ <SEP> ~ <SEP> origin <SEP> end <SEP> department <SEP> ~ <SEP> ~ <SEP> ~ <SEP> ~ <SEP> point <SEP> origin <SEP > point
<tb> or <SEP> common <SEP> end
<tb> pole <SEP> pole <SEP> ~ <SEP> department <SEP> ~ <SEP> ~ <SEP> ~ <SEP> pole
common <tb> or <SEP>
<tb> path <SEP> pole <SEP> origin <SEP> pole <SEP> end <SEP> axis <SEP> main <SEP> axis <SEP> 2 <SEP> yes <SEP> yes <SEP> ~ <SEP > ~ <SEP> ~
<tb><SEP> Access Point <SEP> Pole <SEP> ~ <SEP> ~ <SEP> Department <SEP> ~ <SEP> ~ <SEP> ~ <SEP> ~
common <tb> or <SEP>
<Tb>
BASE TMC-ALERT C

<SEP> w <SEP>
<tb> n <SEP> locating <SEP> name <SEP> axis <SEP> offset + <SEP> offset
<tb><SEP> 53 <SEP> - <SEP> A <SEP> 54
<tb><SEP> 54 <SEP> - <SEP> A <SEP> 55 <SEP> 53
<tb><SEP> 55 <SEP> - <SEP> A <SEP> 56 <SEP> 54
<tb><SEP> 56 <SEP> - <SEP> A <SEP> 57 <SEP> 55
<tb><SEP> 57 <SEP> - <SEP> A <SEP> 56
<tb><SEP> 125 <SEP> - <SEP> B <SEP> 127
<tb><SEP> 127 <SEP> - <SEP> B <SEP> 128 <SEP> 125
<tb><SEP> 128 <SEP> - <SEP> B <SEP> 135 <SEP> 127
<tb><SEP> 135 <SEP> - <SEP> B <SEP> 128
<tb> ENRICHED TABLE OF ORIENTED SEGMENTS (ALERT Plus)

numeric <SEP> Type <SEP> Pole <SEP> 1 <SEP> Pole <SEP> 2 <SEP> Name <SEP> 1 <SEP> Name <SEP> 2, Reference, <SEP> Point <SEP> Point <SEP > direction <SEP> location <SEP> pattern <SEP> character <SEP> heading <SEP> of <SEP> is over
object <SEP> object <SEP><SEP> name <SEP> axis length, speed, <SEP> access <SEP> 1 <SEP> access <SEP> 2 <SEP> to <SEP> take <SEP> cement <SEP> from <SEP> route <SEP> risk <SEP> output
<tb> ALERT <SEP> C1 <SEP> Junction <SEP> Junction <SEP><SEP> Panel <SEP> Road
<tb> ALERT <SEP> C2 <SEP> departure <SEP> departure
<tb> stub <SEP> A <SEP> B <SEP> 41 <SEP> 4 <SEP> 1 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> interpole
<tb> segment
<tb> oriented
<tb> stub <SEP> B <SEP> A <SEP> 14 <SEP> 1 <SEP> 4 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> interpole
<tb> segment
<tb> oriented
<tb> stub <SEP> B <SEP> C <SEP> 25 <SEP> 2 <SEP> 5 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> interpole
<tb> segment
<tb> oriented
<tb> section <SEP> C <SEP> B <SEP> 52 <SEP> 5 <SEP> 2 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> interpole
<tb> segment
<tb> oriented
<tb> stub <SEP> B <SEP> D <SEP> 36 <SEP> 3 <SEP> 6 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> interpole
<tb> segment
<tb> oriented
<tb> section <SEP> D <SEP> B <SEP> 63 <SEP> 6 <SEP> 3 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> intrapole
<tb> segment
<tb> oriented
<tb> stub <SEP> B <SEP> 12 <SEP> 1 <SEP> 2 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> intrapole
<tb> segment
<tb> oriented
<tb> stub <SEP> B <SEP> 23 <SEP> 2 <SEP> 3 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> intrapole
<tb> segment
<tb> oriented
<tb> stub <SEP> B <SEP> 31 <SEP> 3 <SEP> 1 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> intrapole
<tb> segment
<tb> oriented
<tb> TABLE ENRICHIE DES CARREFOURS (ALERT Plus)

<SEP> object number <SEP><SEP> type of object <SEP> pole <SEP> 1 <SEP> reference <SEP> name <SEP> coordinate <SEP> Y <SEP> radius <SEP> crossroads
<tb> 1 <SEP>SEP> access point <SEP> B <SEP> yes <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> crossroads
<tb> 2 <SEP> access <SEP> point <SEP> B <SEP> yes <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> crossroads
<tb> 3 <SEP> access <SEP> point <SEP> B <SEP> yes <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> crossroads
<tb> 4 <SEP>SEP> access point <SEP> A <SEP> yes <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> crossroads
<tb> 5 <SEP><SEP> access point <SEP> C <SEP> yes <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> crossroads
<tb> 6 <SEP> access <SEP><SEP> D <SEP> yes <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> crossroads
<tb> ENRICHED TABLE OF FLOW INFORMATION (ALERT Plus)

type <SEP> of object <SEP> crossroads <SEP> crossroads <SEP> crossroads <SEP> message <SEP> impossibilities <SEP> of <SEP> crossroads <SEP> thumbnails
<tb> previous <SEP> current <SEP> next <SEP> extra <SEP> junction, <SEP> transparent
<tb> of <SEP> banned <SEP> instructions
<tb> path <SEP> 4 <SEP> 1 <SEP> 2 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> path <SEP> 3 <SEP> 1 <SEP> 4 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> path <SEP> 3 <SEP> 1 <SEP> 2 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> path <SEP> 1 <SEP> 2 <SEP> 3 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> path <SEP> 1 <SEP> 2 <SEP> 5 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> path <SEP> 5 <SEP> 2 <SEP> 3 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> path <SEP> 2 <SEP> 3 <SEP> 1 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> path <SEP> 2 <SEP> 3 <SEP> 6 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> path <SEP> 6 <SEP> 3 <SEP> 1 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> ENRICHED TABLE OF ORIENTED SEGMENTS (ALERT C)

number <SEP> hub <SEP> hub <SEP> machine name <SEP> axis <SEP> length <SEP> speed <SEP> direction <SEP> location <SEP> template <SEP> characteristic <SEP> heading <SEP> of <SEP>
<tb> object <SEP> start <SEP> arrival <SEP> to <SEP> take <SEP><SEP> panel from <SEP><SEP><SEP> route <SEP> route
<tb> 53 <SEP> 54 <SEP> A <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 54 <SEP> 55, <SEP> 128 <SEP> A <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 55, <SEP> 128 <SEP> 56 <SEP> A <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 56 <SEP> 57 <SEP> A <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 57 <SEP> 56 <SEP> A <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 56 <SEP> 55, <SEP> 128 <SEP> A <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 55, <SEP> 128 <SEP> 54 <SEP> A <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 54 <SEP> 53 <SEP> A <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 125 <SEP> 127 <SEP> B <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 127 <SEP> 55, <SEP> 128 <SEP> B <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 55, <SEP> 128 <SEP> 135 <SEP> B <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 135 <SEP> 55, <SEP> 128 <SEP> B <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 55, <SEP> 128 <SEP> 127 <SEP> B <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 127 <SEP> 125 <SEP> B <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> ENRICHED TABLE OF CARREFOURS (ALERT C)

number <SEP> of object <SEP> name <SEP> axis <SEP> coordinate <SEP> X <SEP> coordinate <SEP> Y <SEP> radius <SEP> crossroad
<tb> 53 <SEP> A <SEP>&num;<SEP>&num;<SEP>&num;
<tb> 54 <SEP> A <SEP>&num;<SEP>&num;<SEP>&num;
<tb> 55, <SEP> 128 <SEP> - <SEP> A, <SEP> B <SEP>&num;<SEP>&num;<SEP>&num;
<tb> 56 <SEP> A <SEP>&num;<SEP>&num;<SEP>&num;
<tb> 57 <SEP> - <SEP> A <SEP>&num;<SEP>&num;<SEP>&num;
<tb> 125 <SEP> - <SEP> B <SEP>&num;<SEP>&num;<SEP>&num;
<tb> 127 <SEP> B <SEP>&num;<SEP>&num;<SEP>&num;
<tb> 135 <SEP> - <SEP> B <SEP>&num;<SEP>&num;<SEP>&num;
<tb> ENRICHED TABLE OF FLOW INFORMATION (ALERT C)

crossroad <SEP> previous <SEP> crossroad <SEP> common <SEP> crossroad <SEP> next <SEP> additional <SEP> message <SEP> impossibilities <SEP> of <SEP> junction <SEP> crossroad <SEP> transparent <SEP> vignette
<tb> of <SEP> banned <SEP> instructions
<tb> 54 <SEP> 128, <SEP> 55 <SEP> 135 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 54 <SEP> 128, <SEP> 55 <SEP> 56 <SEP>&num;<SEP>&num;<SEP>&num;
<tb> 54 <SEP> 128, <SEP> 55 <SEP> 127 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 135 <SEP> 128, <SEP> 55 <SEP> 56 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 135 <SEP> 128, <SEP> 55 <SEP> 127 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 135 <SEP> 128, <SEP> 55 <SEP> 54 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 56 <SEP> 128, <SEP> 55 <SEP> 127 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 56 <SEP> 128, <SEP> 55 <SEP> 54 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 56 <SEP> 128, <SEP> 55 <SEP> 135 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 127 <SEP> 128, <SEP> 55 <SEP> 54 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 127 <SEP> 128, <SEP> 55 <SEP> 135 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<tb> 127 <SEP> 128, <SEP> 55 <SEP> 56 <SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;<SEP>&num;
<Tb>

Claims (19)

 1. A method for dynamic guidance of a motor vehicle, comprising determining the instantaneous position of the vehicle, its routing between two specific points of the road network traffic consisting of a choice of route, and its guidance in voice form, textual or graph along this route, characterized in that the database constituting the main road traffic network is made from a database filled with traffic information, whose objects are transformed to become objects specific to the guidance and routing of the vehicle, supplemented by specific attributes for guidance and routing and consisting of geographical coordinates and names of road network elements, routing instructions, graphic descriptions and directional indications . 2. Guidance method according to claim 1, characterized in that, the database corresponding to the road network filled with traffic information having as objects, inter alia, access points, immersed points, interpolated sections. and intrapoles, the objects specific to the guiding and the routing which are the crossroads on the one hand and the oriented segments on the other hand, of the database constituting the main road network of circulation, are obtained, respectively, from these points access points and immersed points on the one hand, and said interpole and intrapole sections on the other hand belonging to the database entered. 3. Guidance method according to claim 1, characterized in that, the database corresponding to the road network filled with traffic information having as objects locators corresponding to intersections and exchangers, objects specific to guiding and to the routing that are on the one hand the crossroads and on the other hand the oriented segments are obtained respectively from all the localizers belonging to the indicated data base, and from two consecutive localisers, one said of departure and the other says of arrival. 4. Guidance method according to claim 2, characterized in that the database constituting the main road network of traffic comprises a table enriched oriented segments, obtained from the interpolated sections and intrapoles of the database provided by the information traffic, to which are added guiding specific attributes, which are the direction to be taken, the location of the panel in relation to the junction, the road model and the characteristics of the road, the exit heading which is information on the direction overall to follow at a crossroads, and oversees it. 5. Guidance method according to claim 3, characterized in that the database constituting the main road network of traffic comprises a table enriched oriented segments, obtained from the starting and ending localisers of the database entered. , to which are added guiding specific attributes, which are the direction to be taken, the location of the panel in relation to the junction, the road model and the characteristics of the road, the exit heading which is information on the overall direction to follow at a crossroads, and fly over it. 6. Guiding method according to claim 2, characterized in that the database constituting the main road network of traffic comprises a table enriched intersections, formed from the access points and immersed points of the database filled out. traffic information, to which guiding attributes, such as the name of the junction, the geographical coordinates (X and Y) with respect to a marker and the radius of the junction, have been added. 7. Guiding method according to claim 3, characterized in that the database constituting the main road network of traffic comprises a table enriched crossroads, formed from the localisants of the database entered, to which guiding attributes, as the geographic coordinates (X and Y) relative to a landmark and the radius of the intersection, have been added. 8. Guidance method according to one of claims 6 or 7, characterized in that the database constituting the main road network of traffic comprises a table enriched routing information, given to the motorist at the exit of a junction current considered where is the vehicle, whose orientation is taken into account, this table of pathways having for attributes the current crossroads, as well as the previous crossroads from which it comes and the next crossroads where it goes, an additional message of guiding, the impossibilities of junction and the forbidden ways, the vignettes which are the graphic descriptions of the crossroads and the transparent intersections. 9. Guidance method according to one of claims 1 to 8, characterized in that, when the route taken by the vehicle comprises a portion not served by the broadcast traffic information and constituting a so-called secondary network generally at the beginning and end of course, it comprises a complementary routing phase and a guidance phase "with the compass", possibly enriched by additional information. 10. Guiding method according to one of claims 1 to 8, characterized in that, when the route taken by the vehicle comprises a portion not served by the broadcast traffic information and constituting a so-called secondary network generally at the beginning and end of course, it comprises a complete routing and guidance phase based on a conventional navigation database, type guidance "street by street. 11. Guidance method according to one of claims 9 or 10, for a vehicle located at a point (PO) located on the secondary network, not belonging to a database filled with traffic information and to surrender. at a point (P1) also located on the secondary network, characterized in that the routing phase comprises the following steps - determining the points of the main network of  traffic closest to the starting points  (PO) and arrival (P1) of the vehicle - assignment, from the starting point (PO), of a  weight each way to join the  main network via the points of this  network closest to the starting point (PO), this  weight being equivalent to a travel time and  depending on the guidance mode used on the network  secondary, compass type or conventional type to  from a classic navigation database  vector - assigning a weight to each possible path  connecting the most important main network points  close to the starting point (PO) at points of this same  network closest to the point of arrival (P1), this  weight taking into account traffic information  scattered and nominal speeds dependent on the  the nature of the roads used - assigning a weight to each path allowing  connect the point of arrival (P1) to the points of the network  which are closest to it - determination of the fastest route between the point  (PO) and the point of arrival (P1) in  integrating traffic information on the most  much of the path that corresponds to the network  main. 12. Guidance method according to one of claims 9 or 10, for a vehicle located at a point (PO) located on the secondary network, not belonging to a database filled with traffic information and to travel at a point (P1) also located on the secondary network, characterized in that it comprises a guiding phase comprising the following steps - between the starting point (PO) and the main network  circulation, compass guidance or guidance  complete drawing on a database of  classic navigation, called "street by street" - guidance on the main network, by indications  voice, textual or graphic, consisting of  routing instructions in the intersections or  the directional signs data with names and  route numbers - compass guidance between the main network and the  point of arrival (P1), possibly enriched by  additional information, or classic guidance. 13. Guidance method according to one of claims 9 or 10, for a vehicle located at a point (PO) located on the secondary network, not belonging to a database filled with traffic information and to surrender at a point (P1) also located on the secondary network, characterized in that it comprises a rerouting phase on the secondary road network, scheduled during the course of the calculated route of the main network, when the vehicle left the paths of the main network on which it is guided, to make it join said main network. 14. Guidance method according to one of claims 1 to 10, for a vehicle located at a point (PO) located on the secondary network, not belonging to a database filled with traffic information and to surrender. at a point (P1) also located on the secondary network, characterized in that it comprises a rerouting phase on the main road network, intended to provide an alternative route in case of road problem on the route calculated by the system. 15. Guidance method according to one of claims 1 to 14, characterized in that the database constituting the main road network is made from a database developed for the system Radio Data System (RDS) using the protocol called Message Channel (TMC) traffic. 16. Guidance system implementing the method according to one of the preceding claims, embedded in the vehicle, characterized in that it consists of the following elements: - a receiver-decoder (1) of traffic information - an interface ( 2) man-machine based on a system of  visualization, such as an alphanumeric display or  graphic for example, or on a synthesis system  of words - designation means (3) - a memory medium (4), of the memory card type or  smart card containing the traffic database  and navigation - a locator module (5) - an electronic calculator (6) for managing the  previous elements and to perform in particular the  route calculations, identify the progress of the  vehicle along this route and select  guidance indications to be issued to the driver  of the vehicle. 17. Guidance system according to claim 16, characterized in that the receiver-decoder (1) of the traffic information is of the type Radio Data System (RDS), or SWIFT, DAB, GSM. 18. Guidance system according to claim 16, characterized in that the designation means (3) are constituted by buttons on the front face of the dashboard, or by a command under the steering wheel or by a remote control. 19. Guidance system according to claim 16, characterized in that the location module (5) is of the Global Positioning System (GPS) type, which can be associated with position estimation sensors of the gyrometer type, using possibly the "map-matching" technique performing a digital vector map registration.