the Policía Regia), dependent on the municipal government, and the State Public Safety. The Policía Regia protects the city's downtown and main areas, while the State Public Safety is in charge of remoter areas. Since the 2011 attack on the Casino Royale, security has been reinforced by military and federal police. Infrastructure Transportation Monterrey is connected with the United States–Mexico border, the sea and inland Mexico through different roads, including the Carretera Nacional (also known as the Panamerican Highway) that runs from Nuevo Laredo to Mexico City and south, and the Carretera Interoceánica connecting Matamoros with the port of Mazatlán on the Pacific; it is also crossed by highways 40, 45, 57. The divided highway Monterrey-Saltillo-Matehuala-Mexico City is the main land corridor to interior Mexico. There are several between-cities bus lines at the bus station downtown. There are arrivals and departures into deeper Mexico, to the U.S. border and into the United States. Monterrey is also connected by at least three important railroad freight lines: Nuevo Laredo-Mexico City, Monterrey-Tampico, and Monterrey-Pacific (Mazatlán). The average amount of time people spend commuting with public transit in Monterrey, for example to and from work, on a weekday is 85 min. 25% of public transit riders, ride for more than 2 hours every day. The average amount of time people wait at a stop or station for public transit is 17 min, while 29.% of riders wait for over 20 minutes on average every day. The average distance people usually ride in a single trip with public transit is 9.5 km, while 25% travel for over 12 km in a single direction. The city has a rapid transit system called Metrorrey, which currently has 2 lines. and a BRT called Ecovía. The city is served by two international airports: General Mariano Escobedo International Airport (served by major international carriers and moving more than 6.5 million passengers in 2007) and Del Norte International Airport, a primarily private airport. Monterrey is linked through frequent non-stop flights to many Mexican cities and to key United States hubs (Atlanta, Chicago-O'Hare, Dallas/Fort Worth, Detroit, Houston-Intercontinental, JFK/New York, and Las Vegas). Monterrey is the second most important city for the operating routes of Aeroméxico. Four airlines have their operational bases and headquarters in Monterrey, Volaris, Aeroméxico Connect, VivaAerobus and Magnicharters. Regarding ground transportation from Monterrey International Airport, taxi services link the airport with the city and charge around US$20 for