There are also regular ferries from the mainland to the Caribbean Islands of Isla Mujeres and Cozumel. Mexico has a good railway network and trains link all the main towns in the country. A spectacular route is the Copper Canyon Railway that runs between Chihuahua and Los Mochis. However, most people travel by bus since it is considerably faster and provides a more extensive service. Children under five travel free, provided they are accompanied by a parent.
Traffic drives on the right.
A toll is charged for use of the expressways, which are managed by Caminos y Puentes Federales de Ingresos y Servicios Conexos. Rest areas at toll sites also provide ambulance and breakdown services. Car use in Mexico City is restricted to cut down on pollution. The last digit of the car number plate determines when that car cannot be driven. Mexico is linked by an excellent and very economical bus system.