In the United States, both the terms "cab" and "taxi" are commonly used to refer to a vehicle that provides on-demand transportation services for a fee. The choice of term can vary depending on regional and personal preferences. Some people may use "cab" more frequently, while others may prefer "taxi." Regardless of the term used, these vehicles typically have a meter that calculates the fare based on distance traveled and waiting time.

Additionally, in recent years, ridesharing services like Uber and Lyft have become popular alternatives to traditional taxis or cabs in many parts of the United States. These services use smartphone apps to connect passengers with drivers who use their own vehicles to provide transportation.

So, while both "cab" and "taxi" are used in the U.S., you may also hear people referring to ridesharing services as a way to get around.