After the canal opened, the increasing number of cars, and the construction of a new road leading to Chiriquí, in the west of Panama, increased the need for some kind of crossing.
West Panama includes the districts that are over the Bridge of the Americas (Arraiján, La Chorrera, Chame and San Carlos).
In Panama City there are six highways: the Panama-Arraijan Bridge of the Americas, Panama-Arraijan Centennial Bridge, Arraijan-Chorrera, Corredor Norte, Corredor Sur, and Autopista Alberto Motta.
The allowable size is limited by the width and length of the available lock chambers, by the depth of water in the canal, and by the height of the Bridge of the Americas since that bridge's construction.
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In Panama City are 6 highways working being that the Panama--Arraijan Bridge of the Americas, Panama-Arraijan Centennial Bridge, Arraijan-Chorrera, Corredor Norte, Corredor Sur, and Autopista Alberto Motta