The Los Angeles County Metropolitan Transportation Authority, or the Metro, is the public transportation method for those living in L.A. The system has been used as a model for transportation plans across the country. It is one of the largest in America and serves more than 9.6 million people in its nearly 1,500-square mile range. Metro also offers great advertising opportunities to area businesses who want a great deal of exposure to business and leisure travelers with modest to moderate incomes. The system is owned and operated by the Los Angeles County Metropolitan Transportation Authority, who shares the name of the actual vehicle. The system has been open since 1990. It includes five different lines, two of which are subways and three which are light rail lines and it covers nearly 80 miles of rail. There are 70 stations and the system welcomes more than 300,000 riders each day. The Metro is considered a descendent of the Pacific Electric Red Car and Los Angeles Railway Yellow Car lines, both which served as the public transportation system in the early and middle of the 20th century. The Metro is the third busiest rail system in the country and operates seven days a week from 5 AM until midnight. There are some occasions when the schedule is expanded based on holidays and special events.