Share Your Taxi careers

While driving or being in taxi we all have came across cases when two cars/taxis move in the same direction with only one passenger inside.How efficient it would have been, if two people could use the same taxi when they head to the same direction? It would contribute to both easing the traffic and saving money, as the fee would be shared between two.
An application can be developed to register taxi drivers and ordinary people who use taxi services. The users of the application will be individuals and taxi drivers who want to use or provide taxi services and are willing to share their taxi with another client, who is headed in the same direction.The transportation fee will be calculated by the application depending on the destination of each passenger. The fee will certainly be lower than when they order separate taxis.
The result is profitable for both passengers and taxi drivers and also the traffic is eased, and the environment is not polluted by emissions from the cars.