*Public transport is provided by buses and supplemented by a BRT system. The three main highways that bisect and serve Guatemala start in the city. (CA9 Transoceanic Highway - Puerto San Jose to Puerto Santo Tomas de Castilla-, CA1 Panamerican Highway - from the Mexican border to Salvadorian border - and to Peten.) Construction of freeways and underpasses by the municipal government, the implementation of reversible lanes during peak rush-hour traffic, as well as the establishment of the Department of Metropolitan Transit Police (PMT), has helped improve traffic flow in the city. Despite these municipal efforts, the Guatemala City metropolitan area still faces growing traffic congestion.