Title: List of toll roads
Content:  The first tolled Mexican federal highway, between Amacuzac, State of Mexico, and Iguala, opened in 1952 and provided the first partial high-speed connection on the Mexico-Acapulco route. Dozens of toll highways now exist in Mexico, referred to as autopistas or supercarreteras. Most federal toll roads are four lanes, though some, especially in mountainous areas, are two. Toll (quota) roads provide high-speed alternatives to non-toll federal highways as well as bypasses of major and mid-sized cities.
Title: Geography of toll roads
Content:  Mexico has an extensive system of toll roads or Autopistas. Autopistas are built and funded by Federal taxes and are built to nearly identical standards as the US Interstate Highways System. Also, many states in Mexico have their own toll roads such as Puebla, Veracruz and Nuevo León. All federal toll highways operate with 3 payment options, cash, credit card and electronic tag IAVE. IAVE in all the highways is operated by Caminos y Puentes Federales (CAPUFE).
Title: List of Mexican autopistas
Content:  This is a list of autopistas, or tolled (cuota) highways, in Mexico. Tolled roads are often built as bypasses, to cross major bridges, and to provide direct intercity connections. Many federal highways corridors numbers cover more than one autopista; other federal highways do not have limited access sections. Normally, Mexican federal highways that are on toll roads have the letter suffix "D" for Directo, e.g. Fed. 45 is free (libre) and Fed. 45D is toll (cuota). Most autopistas have a toll over all or part of their length. A few autopistas in very mountainous areas are two-lane. The Mexican limited access highway network is the largest in the Americas outside the USA. The construction is generally financed by toll revenue (thus user fees) rather than fuel taxes, thus the toll rates are usually rather high, about MXN 1 - 2 $/km, roughly 15 - 30 cent/mi for private cars and motorcycles. Toll plazas along the mainline charge tolls anywhere from MXN $20 to $300, or US$1 to $15. Plazas, crossing the border, accept either pesos or U.S. dollars, but after leaving border city limits one must pay in pesos.
Title: Transportation in North America
Content:  Mexico also has a very large road network, 323,977 km worth of roads. Of these, 96,221 km are paved (this is including 6,335 km of expressways) The remainder (227,756 km worth) is unpaved. Since 1991, Mexico has been building toll roads that link its major cities together. Currently, there are 6,335 km worth of toll freeways in the country, with the numbering scheme of n-D (n being the number of the road bypassed, such as 45, with toll freeway as 45-D, meaning 45 Diversion).
Title: Transportation in Mexico
Content:  numbers. Toll expressways usually run parallel to a free road and so are assigned the same number with the letter "D" added. (For example, the undivided two-lane highway connecting Mexico City and Puebla is MX 150, and the six-lane toll expressway is MX 150D). Mexico has had difficulty in building an integrated highway network because of the country's orography and landscape characteristics —most of the country is crossed by high-altitude ranges of mountains. Over the last two decades, Mexico has made impressive investments in order to improve its road infrastructure and connect main cities and towns across the country. In spite of its extension and recent development, 
Title: Mexican Federal Highway 57D
Content:  The highway between Mexico City and Querétaro is one of the oldest components of the Mexican toll road network, being the third toll highway to open in the country. It was built by Caminos Federales de Ingresos, S.A. de C.V., a state-owned predecessor to Caminos y Puentes Federales (CAPUFE), and reduced travel times between Mexico City and cities in central and northern Mexico. The road also crosses through a portion of the state of Hidalgo, including the city of Tepeji del Río. Not all of the road to Querétaro is tolled, but traffic is tolled on the 145.8 km between Mexico City and Palmillas, for a toll of 148 pesos (for cars) over two toll booths.
Title: Transportation in Mexico
Content:  the most expensive in the world according to a comparative study realized in 2004 by the Chamber of Deputies. The most traveled freeways are those that link the three most populous cities in Mexico— Mexico City, Guadalajara, and Monterrey in the form of a triangle.  No federal freeway or expressway crosses a city; toll expressways are either turned into toll bypasses (libramientos), often used as toll or free ring roads (periféricos), or are turned into major arterial roads even if they function as freeways with restricted access. Mexican highways are assigned a one to three-digit number. North-south highways are assigned odd numbers whereas east-west highways are assigned 
Title: Mexican Federal Highway 150D
Content:  Federal Highway 150D is a toll highway connecting Mexico City to Veracruz City via Puebla City and Córdoba. It serves as one of the backbones of Mexico's toll road system. The road is primarily operated by Caminos y Puentes Federales, which charges cars 520 pesos to travel Highway 150D, with one segment in the Puebla metropolitan area built and maintained by OHL and PINFRA.
Title: Greater Mexico City
Content:  Greater Mexico City is connected through a private network of toll expressways to the nearby cities of Querétaro, Toluca, Cuernavaca, Pachuca and Puebla. Ring roads are the Circuito Interior (inner ring), Anillo Periférico; the Circuito Exterior Mexiquense ("State of Mexico outer loop") toll road skirting the northeastern and eastern edges of the metropolitan area, the Chamapa-La Venta toll road skirting the northwestern edge, and the Arco Norte completely bypassing the metropolitan area in an arc from west (Toluca) to north (Tula) to east (Puebla). A second level (where tolls are charged) of the Periférico, colloquially called the segundo piso ("second floor"), was officially opened in 2012, with sections still being completed. The Viaducto Miguel Alemán crosses the city east-west from Observatorio to the airport. In 2013 the Supervía Poniente opened, a toll road linking the new Santa Fe business district with southwestern Mexico City. Inside the city, ejes viales; high-volume, mostly one-way roads, cross the city from side to side in a vast numbered system.
Title: Transportation in Mexico
Content:   The roadway network in Mexico is extensive and all areas in the country are covered by it. The roadway network in Mexico has an extent of 366095 km, of which 116802 km are paved, making it the largest paved-roadway network in Latin America. Of these, 10474 km are multi-lane expressways: 9544 km are four-lane highways and the rest have six or more lanes. The highway network in Mexico is classified by number of lanes and type of access. The great majority of the network is composed of undivided or divided two-lane highways, with or without shoulders, and are known simply as carreteras. Four or more-lane freeways or 

Question: what are the toll roads called in mexico?
Answer: autopistas.