MTA Regional Bus Operations (RBO) is the surface transit division of the Metropolitan Transportation Authority (MTA). It was created in 2008 to consolidate all bus operations in New York City operated by the MTA. As of February 2018, MTA Regional Bus Operations runs 234 local routes, 71 express routes, and 20 Select Bus Service routes. Its fleet of 5,840 buses is the largest municipal bus fleet in the United States and operates 24/7. In 2023, the system had a ridership of 730,924,600, or about 2,309,600 per weekday as of the fourth quarter of 2023.

The Metropolitan Transportation Authority (MTA) is a public benefit corporation responsible for public transportation in the New York City metropolitan area of the U.S. state of New York. The MTA is the largest public transit authority in North America, serving 12 counties in Downstate New York, along with two counties in southwestern Connecticut under contract to the Connecticut Department of Transportation, carrying over 11 million passengers on an average weekday systemwide, and over 850,000 vehicles on its seven toll bridges and two tunnels per weekday.