The city of Los Angeles is the largest city in California, where it has the second most populous metropolitan region in the United States. Without the other cities that form part of the Los Angeles Metropolitan Region, the entire city has a population of 3, 979, 576 where 66.5 % of the population are engaged in the labour force of the city.
Los Angeles has numerous areas for air access through the Los Angeles International Airport, among the world’s busiest by volume of passengers and cargo; the LA/Ontario International Airport, Bob Hope Airport, Long Beach Airport, John Wayne Airport and Van Nuys Airport. The city is linked by rail through Amtrak, Metrolink, Union Pacific and Metro Rail. Union Pacific provides most freight services from Los Angeles to other cities. Los Angeles is linked to other cities by road through Interstate 5, US Route 101, and Interstate 10. Port facilities for Los Angeles are at the seaports of Los Angeles and Long Beach.
While Los Angeles is famously known for its involvement in the movie industry, other key heavy industries in the city revolve around manufacturing, transport and construction. Heavy Industrial Zones in Los Angeles are classified under M2, where these industries are mostly located in the Silverlake, Echo Park and Elysian Valley; Northeast Los Angeles, Boyle Heights areas, as well as the Port of Los Angeles Area towards the south of the city, linked by more heavy industrial areas in the Harbor Gateway Area.