A module for use in constructing a pathway for traffic comprises a base member having a perimeter edge. The base member defines a lateral groove disposed at the perimeter edge and a tongue structure disposed at the perimeter edge and shaped and dimensioned to be received in the lateral groove. The tongue structure comprises a plurality of tongue portions, and includes a first type of tongue portion and a second type of tongue portion disposed in alternating relation generally along the length of the tongue structure, to thereby define a throughpassage for receiving a securing rod therethrough. To form a pathway for traffic, the modules are placed in perimeter-edge to perimeter-edge relation one to the next, with the tongue structure of the modules inserted into the lateral groove of an adjacent module, and are secured together by the securing rod.