Taxicabs were a form of transportation in the 20th and 21st centuries.
History
By 2015, taxicabs, like most vehicles, were able to fly, which rendered transportation much quicker than when they were road cars. However, the fares were much more expensive compared to the previous century.
Cab B25, in which Old Biff (who can be seen in the back seat) followed Doc and Marty in 2015.
In 2015, Biff Tannen followed Doc and Marty to Hilldale in Cab B25. Fred, the cab driver, had an intelligent parrot named Priscilla that could read the amount of the fare.
In 2091, Jules and Verne took a taxicab to the McFly Space Center to find their parents.