Mass rapid transit and Public transit

Mass rapid transit noun - An urban public transit system using underground or elevated trains.

Public transit and mass rapid transit are semantically related. In some cases you can use "Public transit" instead a noun phrase "Mass rapid transit".

Public transit noun - A public transportation system for moving passengers.

Mass rapid transit and public transit are semantically related. Sometimes you can replace phrase "Mass rapid transit" with "Public transit", this phrases are similar.