CNNExpansión – The controversial Bicentennial Viaduct operated by OHL Mexico was the “king” of the rise in tolls from 2014-2015 in percentage terms, as much as a 30 percent increase.

http://www.cnnexpansion.com/negocios/2015/05/12/viaducto-bicentenario-el-alza-de-tarifa-mas-alta-en-edomex