Tomtom Development Germany Gmbh

Tomtom Traffic B.v.

Bayerische Motoren Werke Aktiengesellschaft

David Schilling

Alexander Augst

Nikolaus Witte

Stefan Lorkowski

Arne Kesting

A method of generating flow data indicative of speeds of travel within a navigable network in an area covered by an electronic map is disclosed. The electronic map comprises a plurality of segments representing navigable elements of the navigable network. Live vehicle probe data is obtained indicative of the average speed of travel for the current time with respect to distance along a link, the link being predetermined by reference to the electronic map. The link is sectioned to provide a plurality of sections along the length thereof. The sectioning is carried out based on the data indicative of the current average speed of time along the link. Where a differential in the current average speed exceeds a threshold, a new section is created. Data is generated indicative of the location of the link together with data indicative of each determined section of the link, the data indicative of each determined section of the link being associated with data indicative of the average speed of travel for the current time for the section. The same process can be repeated using predicted flow data for a future time, but using a more stringent threshold, such that the link is divided into a smaller number of longer sections.

Methods and systems for generating flow data

A method and system for identifying a lateral deviation in the course of a road segment is described. Positional data is collected from a plurality of vehicles travelling along a road stretch. A map matching error associated with the position data is used to determine an average map matching error and average absolute map matching error for travel along the road stretch. A lateral deviation in course is identified when the average map matching error measures are both above a given threshold, and where the detected deviation is of a given minimum length. Other indicators of deviation can be considered including a direction of the possible deviation, and impact on travel in the opposite driving direction. Data relating to the determined deviation is generated, including a speed of travel through the deviated region, and used to enhance traffic information.

Method and system for determining a deviation in the course of a navigable stretch

A method of verifying and/or improving a message indicative of an event affecting traffic flow on at least a portion of one or more navigable segments is described. The method involves obtaining positional data relating to the movement of a plurality of devices along a navigable stretch including a navigable stretch identified by the message as being affected, and using the positional data to verify and/or improve the message. The positional data is live data and is used to obtain data relating to the speed of travel of the devices along the navigable stretch including the stretch identified by the message. The speed data can be used to determine a spatial extent of the affected stretch and/or an expected speed of travel along the stretch.

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Berlin, Germany

David Schilling