Hazmats Transportation Network Design Model with Emergency Response under Complex Fuzzy Environment

Table 1

Comparison among these network design models for transportation of hazardous materials.

Author and year	Model	Decision maker	Objective	Main contribution
Kara and Verter, 2004 [7]	Bi-level integer; network design model	Leader: local authority; Follower: carriers	Minimum of total risk; Minimum of total cost	The transportation network design is first considered as a bi-level model.; The bi-level model is generalized to the undirected case.
Erkut and Gzara, 2008 [8]	Bi-level undirected; network design model
Bianco et al., 2009 [9]	Bi-level network; flow model	Leader: metalocal authority; Follower: regional authority	Risk equity; Minimum of total risk	Multiple layers of authorities and risk equity are first considered.
Our paper	Bi-level uncertain network design model	Leader: local authority; Follower 1: emergency dept.; Follower 2: carriers	Minimum of total risk; Maximum of coverage; Minimum of total cost	Emergency response and uncertainty of risk are first considered in network design model.