Mexico's President Felipe Calderón was on hand to open the Norponiente bypass for Irapuato city in central Guanajuato state, the communications and transport ministry (SCT) said in a release.
The project was carried out through a public-private partnership (PPP) and required a total investment of 964mn pesos (US$79.6mn).
The 29km two-lane highway connects the Irapuato-Guadalajara and Irapuato-León highways. The route has four intersections, six bridges, 20 underpasses and an overpass, as well as two rail overpasses.
In the future, the highway will be linked to the Salamanca-León highway, which is currently in the tender process, the release said.
The new bypass will reduce congestion and allow heavy vehicles to avoid the city center, reducing travel time and emissions, as well as providing direct access to industrial plants in the area.