Paris for 31 percent of the GDP of France. According to the Economist Intelligence Unit Worldwide Cost of Living Survey in 2018, Paris was the second-most expensive city in the world, behind Singapore and ahead of Zurich, Hong Kong, Oslo and Geneva. The city is a major rail, highway, and air-transport hub served by two international airports: Paris-Charles de Gaulle (the second busiest airport in Europe after London Heathrow Airport with 69.5 million passengers in 2017) and Paris-Orly. Opened in 1900, the city's subway system, the Paris Métro, serves 5.23 million passengers daily, and is the second busiest metro system in
McCarran International Airport Complimentary shuttle transportation is provided between the terminals and the remote Terminal 1 economy and oversize vehicle lots. In March 2016, the airport opened a cellphone lot, which provides free parking to people waiting for passengers. A consolidated rental car facility opened in April 2007, located about from the airport. The facility, which sits on of land, houses multiple rental car companies with 5,000 parking spaces on multiple levels. Courtesy shuttles transport passengers between the airport and the facility. For transportation between Terminal 1 and Terminal 3, McCarran Airport provides a free shuttle service, which leaves from Level 0 of