sentences:  In spite of its extension and recent development, the roadway network in Mexico is still inadequate to meet the current needs of the population and, except for the toll roads, they are often not adequately maintained.An additional problem is that in the center of the country the roads run into metropolitan Mexico City from regional centers and there are few roads which run peripherically so as to connect the other regional centers without running through the congestion around the capital.The federal government (in partnership with the government of Mexico State and the Federal District) has tried to alleviate this problem by constructing a tolled Mexico City bypass highway, named "Arco Norte," partially opened in 2009.