Example of a linear road network following usual notation for the edges (\(e_{i}\)) and vertex (\(v_{i}\)). Arrows represent the direction of traffic flow.

 
  Part of: Briz-Redón Á (2019) SpNetPrep: An R package using Shiny to facilitate spatial statistics on road networks. Research Ideas and Outcomes 5: e33521. https://doi.org/10.3897/rio.5.e33521