Date of Publication :7th June 2016

Abstract: Li-Fi is transmission of data through illumination by taking the fiber out of fiber optics by sending data through a LED light bulb that varies in intensity faster than the human eye can follow. Li-Fi is the term some have used to label the fast and cheap wireless-communication system, which is the optical version of Wi-Fi. The term was first used in this context by Harald Haas in his TED Global talk on Visible Light Communication. At the heart of this technology is a new generation of high brightness lightemitting diodes, says Harald Haas from the University of Edinburgh, UK, Very simply, if the LED is on, you transmit a digital 1, if it’s off you transmit a 0,Haas says, They can be switched on and off very quickly, which gives nice opportunities for transmitted data The Automation of Toll Gate Systems working model can be explained, by taking Toll Gate Model, as follows: The Toll Gate Office is having a Personal Computer, which is connected with the receiver and the software to run Automation of Toll Gate System. To implement this System every vehicle must be fitted with remote transmitter, hidden behind the Number Plate of the Vehicle. The job of this transmitter is to transmit continuously the Number of Vehicle on which it is mounted, in coded form. When any vehicle enters the zone of Toll Office, the sensors fitted either side of the road, senses and sends the signal to the Toll Office Control Unit. This Micro-controller based Control Unit activates the Number Plate Sensor, which in result receives the Number of the entering vehicle [capturing the signal sent by vehicles remote transmitter] and sends it to computer. The computer scans its centralized database and displays the details of that vehicle with the current time and date. The details are: Registration Number and Model Number with vehicles body color, Owners Name and Address, Date of Registration, Current status Clear or is in black list of any department etc. If the vehicle records show its Current Status is Clear, then the gate will be opened automatically. Otherwise, the gate will not open and the vehicle owner will be called for further enquiry. The Regional Transport Office or RTOs can use this System to watch the unregistered vehicles or trace the other state vehicles. The Cargo Companies can intimate their on-road vehicles about the latest development in the delivery plan and give the next delivery address. The Public Transports can keep the details of each vehicles check-in and check-out times with number of rotations it makes in a day. The Police Department can easily stop the wanted vehicle, by posting the Vehicles Register Number on its Data Base. As the Toll Gate MC checks this Data Base and founds the Current Status as wanted, it does not open the gate and immediately alerts the concerned authority.

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