To display all paths in the flow bundles that do not traverse the selected network objects, show the alternative routes. Then only those OD relations are taken into account that use the selected network objects. If 60 % of the paths of an OD pair traverse the link s selected for the flow bundle, then the alternative routes make up the remaining 40% of the paths of this relation. These are the OD pair paths that do not traverse the selected link s. In the example in Image 238, two links of a bypass (in both line directions) are highlighted for the flow bundle. The links of each direction are combined through an AND THEN operation. The two AND THEN operations for the two line directions are combined via an OR operation. So, independent of the direction, all paths are shown that traverse this link section.
Image 238: Link flow bundle with AND THEN operation and OR operation
In Image 239, a flow bundle of alternative routes is displayed for the same flow bundle criteria as in Image 238. For all OD pairs for which paths were found in the origin flow bundle, the paths are listed that do not traverse the link section selected. The comparison of the two illustrations shows, that most traffic uses the by-pass on these OD pairs. Only a few road users choose the routes which lead through the city. In a planning project the effectiveness of a created measurement could thus be allocated.
