The Los Angeles County Metropolitan Transportation Authority (LACMTA), branded as Metro, is the county agency that plans, operates, and coordinates funding for most of the public transportation system in Los Angeles County, California, the most populated county in the United States.

The Los Angeles Department of Transportation, commonly referred to as LADOT, is a municipal agency that oversees transportation planning, design, construction, maintenance and operations within the city of Los Angeles. LADOT was created by city ordinance, and is run by a general manager appointed by the Mayor of Los Angeles, under the oversight of a citizens' commission also appointed by the mayor. LADOT is best known for providing public transportation to the City of Los Angeles. It currently operates the second-largest fleet in Los Angeles County next to Metro. It consist of over 300 vehicles, serving nearly 30 million passengers a year and operating over 800,000 hours.