Abstract:  This paper focuses on faster data transmit at toll plaza by using Li-Fi module which will reduce the problems that arise in ETC.  The Li-Fi mechanism is implemented in every vehicle and at toll plaza.  At the toll plaza, once the vehicle’s Li-Fi transmitter is paired with the Li-Fi receiver, the system at toll plaza automatically identifies the vehicle details. This paper is based on Li-Fitechnology; the Li-Fi system uses Li-Fi which collects information of vehicle passing through the toll plaza and automatically debits the toll amount from prepaid account of vehicle owner, which in return reduces the traffic congestion and human errors.  When the vehicle will pass through toll gate the amount of toll will automatically be reduced from its account and give deduction message to vehicle owner. This OWC technology uses light from Light-Emitting Diodes (LEDs). The light received by photodiode is converted to binary data and is fed to the microcontroller. The microcontroller is connected to the serial port of the PC.  This gives a win condition for both toll authorities and toll customers.

 Keywords:  Li-Fi (Light Fidelity), LED, Transmitter, Photodiode