MASS TRANSIT OPTION is a term used to describe transportation options that are available to the public. Two of the most common mass transit options are RAIL and METRO, both of which are efficient and cost-effective ways to get around. RAIL systems are typically composed of trains that run on tracks and are powered by electricity or diesel fuel. METRO systems are usually composed of underground or elevated trains that run on tracks and are powered by electricity. Both RAIL and METRO systems provide an efficient way to move people from one place to another.