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Vehicle speed indication using vehicle-infrastructure wireless communication

A vehicle speed, vehicle technology, applied in the field of traffic management, can solve traffic congestion and other problems

Inactive Publication Date: 2013-05-08
TOYOTA MOTOR ENG & MFG NORTH AMERICA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Despite the driver's efforts to drive safely and smoothly, there was some traffic congestion on the highway even in the absence of triggering events

Method used

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  • Vehicle speed indication using vehicle-infrastructure wireless communication
  • Vehicle speed indication using vehicle-infrastructure wireless communication
  • Vehicle speed indication using vehicle-infrastructure wireless communication

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Embodiment Construction

[0015] The vehicle operator (driver) determines the optimal vehicle speed based on various factors such as posted speed limits and surrounding traffic conditions. However, in the absence of other information, the best efforts of drivers on the highway can also lead to sub-optimal speed choices, which can lead to stop-and-go traffic. As a result, crashes, traffic jams, slow traffic and highly fluctuating vehicle speeds occur. These problems are especially prevalent if there is congestion, for example, if the density of vehicles on the road exceeds the design density of the road.

[0016] Traffic congestion occurs even in the absence of triggering events such as construction or previous accidents. For example, in high-density traffic, waves of stopped or slow-moving traffic can propagate along a highway even in the absence of external obstacles. However, by using suggested speeds, heavy and slow traffic can be reduced or eliminated, resulting in greatly improved safety, highwa...

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Abstract

An example traffic control system includes a vehicle unit associated with a vehicle on a highway, one or more roadside units proximate the highway, and a traffic controller. The vehicle unit transmits a vehicle speed to the roadside unit, when in wireless communication range. The roadside unit transmits the vehicle speed to the traffic controller. The traffic controller receives vehicle speed data from a plurality of vehicles, and determines a suggested speed for each vehicle. The suggested speed may be correlated with an average speed of vehicles on a portion of the highway, for example the same highway portion on which vehicle is located, or a highway portion towards which the vehicle is heading.

Description

[0001] References to related applications [0002] This application claims priority to US Patent Application Serial No. 12 / 877617, filed September 8, 2010, the contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to traffic management, including assisting drivers in selecting vehicle speeds that improve traffic flow. Background technique [0004] Despite the driver's efforts to drive safely and smoothly, there is some traffic congestion on the highway even in the absence of a triggering event. Eliminating these traffic congestions will help improve safety, traffic throughput, and reduce the environmental impact of vehicular traffic on highways. Contents of the invention [0005] Examples of the invention include devices and methods that allow for improved traffic management and allow for more efficient vehicle operation. Examples include a proposed vehicle speed indicator system utilizing vehicle-to-infrastructure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/0968
CPCG08G1/096716G08G1/0145G08G1/095G08G1/0133G08G1/096741G08G1/052G08G1/096775G08G1/0112
Inventor H·哈达
Owner TOYOTA MOTOR ENG & MFG NORTH AMERICA INC