Optimization of the University Transportation by Contraction Hierarchies Method and Clustering Algorithms. - Israel David Herrera-Granda; Leandro Leonardo Lorente-Leyva; Diego Hernán Peluffo-Ordóñez; Robert M. Valencia-Chapi; Yakcleem Montero-Santos; Jorge L. Chicaiza-Vaca; Andrés Eduardo Castro-Ospina (HAIS, 2018)