Technical document, update of the previous Agreement signed by several countries from the Central American region, which aims at establishing an adequate unification of regional road signs for pedestrian and vehicle traffic, as well as an efficient use of traffic control devices, rules that justify their use, technical aspects of horizontal and vertical signaling, pavement islands, traffic lights, traffic control and safety devices, and an updated catalogue of signals. All of this with the objective of facilitating and guaranteeing an ordered, safe, and predictable circulation of all users on Central American roads.