Simple network flooding represented with voronoi. Click anywhere on the map to see the network distance to the rest of the network. Basically the same thing as coloring the nodes but with more visual artifacts because voronoi can be problematic.
This example implements a simple weighted breadth-first search to calculate distance and should work with any topojson file that has linestrings. This kind of thing is very useful for identifying areas of a network dataset that need more correcting or additional data.