 While the causeway ends 1.5 km before reaching Williamsburg, a footpath has been archaeologically identified that may extend the rest of the way connecting these sites.Viewing these roads as part of one extensive construction project sharing the same constructive techniques, it is obvious that the cost of the roads to the former inhabitants of Las Mercedes-1 must have been great.A lot of time and manpower were required for the preparation of the terrain, the quantity of stone, the volume of fill, and the amount of other construction materials that must have been transported for the construction of these magnificent roads.