A method of creating a speed estimation

A technology of speed estimation and speed data, applied in traffic control systems, instruments, measuring devices, etc. of road vehicles

Active Publication Date: 2011-01-19
TOMTOM TRAFFIC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former method may provide only limited coverage due to the large number of personnel required, while the latter requires the installation of extensive and expensive infrastructure in the road network

Method used

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  • A method of creating a speed estimation
  • A method of creating a speed estimation
  • A method of creating a speed estimation

Examples

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Embodiment Construction

[0068] figure 1 An example view illustrating a Global Positioning System (GPS) usable by a navigation device. Such systems are known and used for various purposes. In general, GPS is a satellite radio-based navigation system capable of determining continuous position, velocity, time, and in some instances direction information for an unlimited number of users. Formerly known as NAVSTAR, the GPS incorporates multiple satellites orbiting the Earth in precise orbits. Based on these precise orbits, GPS satellites can relay their positions to any number of receiving units. However, it should be understood that a global positioning system such as GLOSNASS, European Galileo positioning system, COMPASS positioning system or IRNSS (Indian Regional Navigation Satellite System) may be used.

[0069] The GPS system is implemented when a device specially equipped to receive GPS data begins scanning the radio frequencies for GPS satellite signals. Upon receiving radio signals from GPS s...

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Abstract

A method of creating a speed estimation representative of vehicle speed along one or more road segments, the method comprising the following steps: obtaining at least reference speed data from a reference source of data and second speed data from a second source of data, wherein the second source is different from the reference and the speed data is indicative of vehicle speed along the or each road segment; using the reference speed data to verify the second speed data and modifying the second speed data according to the verification; and generating an estimation of vehicle speed for the or each road segment based upon the verified second speed data.

Description

technical field [0001] The present invention relates to a method of forming a speed estimate of the speed of a vehicle on a road segment, typically by combining data from a plurality of sources. Specifically but not exclusively, the data sources include velocity data derived from GPS (Global Positioning System) probes and GSM (Global System for Mobile Communications) data, but may include data from a variety of other sources. Background technique [0002] With ever-increasing road traffic levels, traffic congestion reports need to be generated quickly so that a quick response (e.g., action) to them can remove the cause of the traffic congestion, and alert road users approaching the congested area to allow them to take appropriate action , such as selecting an alternate route. [0003] Existing methods typically rely on physical detection of the vehicle, either through direct visual observation or through the use of various kinds of sensors, such as cameras or proximity sens...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G08G1/123G01S5/14G01S19/48G01S19/52
CPCG01S19/52G01S19/48H04W64/006G08G1/0104G08G1/012G08G1/0112G08G1/0129G08G1/0133G08G1/0141G08G1/0116
Inventor斯特凡·洛科瓦斯基彼得·米特拉尔夫-彼得·舍费尔罗布·斯胡尔比尔斯卢西恩·格伦休伊泽恩
OwnerTOMTOM TRAFFIC