Robustness Analysis of Urban Road Networks from Topological and Operational Perspectives

Table 1

List of notations used in Section 2.2.

Notation	Definition
	Represent a directed network, where is a set of nodes and is a set of links
	Represent a set of origin-destination (OD) pairs
	Represent a fixed travel demand for OD pair
	Represent a set of paths connecting OD pair
	Represent the unit travel cost over path
	Represent the flow on path
	Represent the flow on link
	Represent a link-path incident matrix: Equal 1 if ; equals 0 otherwise