Reittierot

Reittierot is a concept used in transportation planning and network analysis to describe the differences between alternative routes that connect two points in a transport network. It encompasses both structural differences—such as which edges or roads are used—and performance differences, including travel time, reliability, and cost. Measuring reittierot helps planners assess route diversity, resilience to disruption, and the trade-offs between speed and robustness.

Common metrics for reittierot include the proportion of non-overlapping edges between routes, the Jaccard distance or other set-based dissimilarity measures on edge sets, and trajectory-based measures such as edit distance between route sequences. In addition, differences in total distance, travel time, and time variability can be incorporated to reflect performance. Graph-based approaches may compare the similarity of edge sequences or the overlap of nodes visited, to quantify how much routes diverge in practice.

Applications of reittierot are widespread in logistics, public transit, and multimodal journey planning. It supports contingency planning and service design by identifying sets of diverse route options that reduce exposure to bottlenecks and incidents. Reittierot also informs robust scheduling, network redesign, and auditing of dependency on single corridors, by highlighting where alternative paths are underutilized or overly similar.

Computing reittierot requires a network graph with attributes such as edge length and travel time. Given candidate routes, researchers and practitioners apply set-based or sequence-based similarity measures, or optimization models that generate diverse route options. Tools from GIS and network analysis libraries facilitate scalable computation.