A tip (gratuity) is based on excellent service.  When using taxi service, expect to be treated fairly and with respect from your cab driver.  The taxi driver should be polite, neat in appearence and kind to his or her passengers.  The taxi cab driver should be a few minutes early when picking up so the customer knows they will be on time.  This is especially important when getting a taxi ride to a job or the airport.  The taxi should be driven without speeding as to insure a comfortable and stress free ride to the destination.  The cab itself should be free of