premise: The New Orleans Regional Transit Authority (RTA or NORTA) is a public transportation agency based in New Orleans. Since 1983 it has operated bus and historic streetcar service throughout the city. With an annual ridership of over 18.6 million riders, the Regional Transit Authority is the largest public transit agency in the state of Louisiana.
hypothesis: bus and street car services became part of he New Orleans Regional Transit Authority (RTA or NORTA) offering in 1983 with a yearly turn over close to 19 million passengers
reason: the statement states that their riders every yearis over 18.6 million