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.

Los Angeles County, officially the County of Los Angeles, and sometimes abbreviated as L.A. County, is the most populous county in the United States, with 9,861,224 residents estimated in 2022. Its population is greater than that of 40 individual U.S. states. Comprising 88 incorporated cities and many unincorporated areas within a total area of 4,083 square miles (10,570 km2), it is home to more than a quarter of Californians and is one of the most ethnically diverse U.S. counties. The county's seat, Los Angeles, is the second most populous city in the United States and the most populous city in California, with 3,822,238 residents estimated in 2022. It is also known for being the home of the American film and television industry, a distinction it has held since the early 20th century which has given the county global prominence.