Links describe roads and railways of the transport network. They connect nodes, which means intersections in PrT or stop points in PuT. A link is represented as a directed element and is described by the From Node number and To Node number. Both directions of a link are two independent objects in the network model, who are assigned the same link number and whose From Node number and To Node number has been swapped. This means, that you can attribute both directions of a link differently. For every link, you must specify the permitted transport systems of PrT and PuT (which are allowed to use the link). This means, that you can close one of the directions to any traffic and model a one-way road in this way.
