gps ppt

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Contents

Introduction Sytem architecture Working Components description Characteristics Current status ETC in india Conclusion Future scope References

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Introduction

To alleviate traffic congestion and jams, enhance the convenience and safety of travelers.

Vehicles passing are enrolled in the program, and debits electronically the accounts.

A new generation of ETC is rapidly developed.

Based on positioning and Global System for Mobile communication (GSM) technologies.

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System Architecture

Five key components• OBU• Enforcement System• Management Center• Clearing Center• payment Service Center

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Working

PSC registers and installs OBU. OBU compares current vehicle position coordinate.

OBU sends transaction message to MC.

MC saves toll data and sends back transaction information to the OBU.

The OBU receives and displays the transaction result.

If the OBU has abnormal state, the violation will be processed.

CC clears all toll data from MC and divides in road service providers.

The PSC collects toll records and clears data for account query.

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On board unit

Positioning , monitoring and billing. Determines how many Km have driven on toll route. Calculates the toll based, transmits to MC. Receives transaction information and displays on screen. The main components are –

• Integrated GPS and Dead Reckoning (DR) positioning module• GSM module• Micro-programmed Control Unit (MCU) • Smartcard module • Human interface

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Enforcement system

A mechanism to deal with the violation.

Catches the license plate pictures and recognizes the license number.

The Fixed Enforcement:

• Vehicle gets closer to monitoring station, the vehicle OBU status is readed and registered

The Moving Enforcement:

• Use the DSRC in the monitoring vehicle to read the OBU status and registered information

• Orders the vehicle to park for violation processing.

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Management centre

Core part and to tracking, monitoring and guiding all the vehicles traveling on the road.

Collected traffic information and map database. • Manage and change the of charging zone• Set up toll road fee rate and digital map data• Collect and save toll data for clearing.• Have extended functions

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Clearing centre

Unified toll data collection

Unified clearing account management Unified settlement time Unified clearing money virement

• Clears toll data, calculates the money and sends virement command to bank.

• Bank transfers money from the clearing center account to each road service provider’s account.

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Contd..

Data Collection Subsystem

Automatic Clearing Subsystem

Daily Settlement Subsystem

Accounting Management Subsystem

Bank Interface Subsystem

Data Backup and Recovery Subsystem.

System Management Subsystem

Operation Statistic and Query Subsystem

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Payment service centre The PSC takes charge ETC users registration, smartcard issuing and

customer service etc• Encryption Subsystem • Issuing Subsystem• Customer Information Management Subsystem • Bank Interface Subsystem • Clearing Center Interface Subsystem• Customer Call Subsystem • Web Site

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Characteristics

GPS is an evolutional technology for ETC

It has advantages that DSRC doesn’t have

There are still some problems of GPS solution

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Advantages

The total capital input of road side unit will be largely reduced It’s easy to setup a new toll area or remove the old ones.

Vehicle traveling multi-path identification problem will be completely resolved.

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Disadvantages

GPS is a new coming technology it is currently on the development and field trial stage worldwide.

More difficult in the matching process between the debit and

enforcement information. The cost of OBU is still high for the users.

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Current status

Germany: The GPS-based ETC system has been running on-line for commercial truck toll-fee collection.

Hong Kong: Hong Kong has finished VPS-based ETC field trial project for road charging from 1997 to 2001.

Switzerland: GPS is used to determine the location of vehicles in Switzerland.

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ETC in india

No legacy systems in place.

Opportunity to build a simple and robust ETC system

Aims to create a framework for building an integrated and uniform system across the country.

Presently, ETC is used at few toll plazas on national highways like: Delhi-gurgaon highway Banglore –elctronic city elevated highway

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Contd…

Not require 2.5Mbps data rates in future

Is a kind tolling where in the vehicles are tracked and tolled based on distance travelled

Manufacturing in India - To overcome the dependency on other countries/technologies

Market will drive competition, brings the prices of OBU within

the reach of a commanman. Cost of end to end ETC solutions slowly develop Indias’s technical capabilities to manufacture

and maintain.

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Conclusion

Based on a combination of GSM and GPS.

Advantage is an absence of the need for new road infrastructure.

Much greater flexibility in defining or changing payment.

Ability to support other value-added services on the same technology platform.

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Future scope The satellite-based toll collection system can be

used,with regard to flexibility what's more, in terms of cost efficiency in implementation and operation.

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References

[1] Wei-Hsun Lee , Shian-Shyong Tseng , and Ching-Hung ang,“design and implement of electronic toll collection system based on vehicle Positioning system techniques,” Computer Communications, vol. 31 ,2008,pp. 2925–2933.

[2] Murphy T J, “Road user charging using satellite positioning technology,” 12th IEE International Conference on Road Transport Information and Control(RTIC 2004),London, UK, 2004,pp,222-225.

[3] Juan Guillenno Jordan, etc., “A comparison of different technologies for EFC and other ITS applications” 2001 IEEE Intelligent Transportation System Conference, Aug. 2001.

QUERIES

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