“…Additionally, geographic clustering has been used to reduce the computational complexity of vehicle routing problems (Bowerman et al, 1994;Bodin and Golden, 1981;Dondo and Cerdá, 2007;Özdamar and Demir, 2012;Schönberger, 2006;Simchi-Levi et al, 2005). Similarly, clustering has been used to understand the distribution of freight demand and simplify logistics operations (Cao and Glover, 2010;Sharman and Roorda, 2011;Singh et al, 2007;Qiong et al, 2011). However, these works present several limitations.…”