The topology is a set of static properties of each road segment or turn, such as physical length, road category, speed limits, and turn types.
Bibliography
Delling, Daniel, Andrew V. Goldberg, Thomas Pajor, and Renato F. Werneck. 2011. “Customizable Route Planning.” In Experimental Algorithms, edited by Panos M. Pardalos and Steffen Rebennack, 6630:376–87. Berlin, Heidelberg: Springer Berlin Heidelberg. https://doi.org/10.1007/978-3-642-20662-7_32.