This is  a gritty film about cab drivers in New York city , And Robert De Niro  is a young cab driver who goes on a rampage from all his disgust of city life. When Robert De Niro was young he had many of his better films and roles , and Taxi Driver is at the top of the list, The Deer Hunter, Cape Fear and other films . A very young Jodie Foster and De niro are the main characters of the story, and life in the big city. You really get the feel what it is  like in New York city with all the crime ,cars and noise and how the people live. Great Classic film .