Los Angeles has a complex multimodal transportation infrastructure, which serves as a regional, national and international hub for passenger and freight traffic. The system includes the United States' largest port complex; an extensive freight and passenger rail infrastructure, including light rail lines and rapid transit lines; numerous airports and bus lines; vehicle for hire companies; and an extensive freeway and road system. People in Los Angeles rely on cars as the dominant mode of transportation, but since 1990 Los Angeles Metro Rail has built over of light and heavy rail serving more and more parts of Los Angeles. As a result, Los Angeles was the last major city in the United States to get a permanent rail system installed. Intercity Transportation in Greater Los Angeles is a complex multimodal transportation infrastructure, which serves as a regional, national and international hub for passenger and freight traffic. The transportation system of Greater Los Angeles includes the United States' largest port complex, seven commuter rail lines, and Amtrak service. With many highways, it is integrated into the Interstate Highway System. Air transportation In the Los Angeles metropolitan area, there are five commercial airports and many more general-aviation airports. The primary Los Angeles airport is Los Angeles International Airport (LAX). The seventh busiest commercial airport in the world and the third busiest in the United States, LAX handled 28.8 million passengers, of cargo and 380,000 aircraft movements in 2020. Other major nearby commercial airports include: LA/Ontario International Airport (serves the Inland Empire); Hollywood Burbank Airport; serves the San Fernando and San Gabriel Valleys); Long Beach Airport (serves the Long Beach/Harbor area); and John Wayne Airport (serves the Orange County area). The world's busiest general-aviation airport is also located in Los Angeles, Van Nuys Airport. Santa Monica Airport is also located near Los Angeles. Intercity train services Union Station is the major regional train station for Amtrak, Metrolink and Metro Rail. The station is Amtrak's fifth busiest station, having 1.4 million Amtrak boardings and de-boardings in 2019. Amtrak operates eleven daily round trips between San Diego and Los Angeles, five of which continue to Santa Barbara via the Pacific Surfliner, the only service that runs through Los Angeles multiple times daily. Two of those trips continue to San Luis Obispo, California. The Coast Starlight provides additional service on the route and beyond to the San Francisco Bay Area, Sacramento, and on to Seattle, Washington. Amtrak