Many highways in India are having toll booth to collect toll tax. There is a manual method existing of hand written or computerized toll ticket issuing & collecting cash from Toll road user (like truck, car, bus etc). This method has many limitations & weaknesses. In India, government is planning for RFID tag based toll collection, which is expensive & time consuming.
This method of "Mobile Phone Based Automatic Toll Collection" is a simple to deploy method for toll collection & uses readily available