Analyzing Road Networks
Combining Wolfram|Alpha and image processing functionality, you can build and analyze a road network. This shows how to highlight streets within a desired area.
img = WolframAlpha["Champaign IL", {{"Map:CityData", 1}, "Image"}];
g = MorphologicalGraph[Binarize[ColorNegate[img]], EdgeStyle -> LightGray, VertexStyle -> LightGray];
Column[{img, HighlightGraph[g, NeighborhoodGraph[g, 125, 20], ImageSize -> 500]}]