Singapore being one of the Global Cities has an advanced integrated transport system. It mainly comprises of SMRT (Singapore Mass Rapid Transport System), Busses and cabs. Its public transport is used by thousands of workers who prefer to skip their personal vehicles. They certainly have plenty of reasons to do so.
Singapore has a centralized ticket issuing system by the form of ez-link cards. Its an RF Id based technology. The card contains the amount which is recharged. During the time of boarding the SMRT or the bus, one needs to tap at the entrance and the cards ID is stored. At the time of getting down, the distance is calculated and the amount is cut. This avoids the use of money and save a lot of paper in terms of ticket.
This technology if and when adopted in a country like India will do wonders to the resources and revenue of the Government. it will save a lot in terms of usage of papers by the form of tickets, money, etc.. Also it helps in bringing down the corruption and thus increase the revenue for the government.