There is a growing awareness that road networks, are becoming
more and more vulnerable to unforeseen disturbances like
incidents and that measures need to be taken in order to make
road networks more robust. In order to do this the following
questions need to be addressed: How is robustness defined?
Against which disturbances should the network be made robust?
Which factors determine the robustness of a road network? What
is the relationship between robustness, travel times and travel
time reliability? Which indicators can be used to quantify
robustness? How can these indicators be computed? This paper
addresses these questions by developing a consistent framework
for robustness in which a definition, terms related to
robustness, indicators and an evaluation method are included. By
doing this, policy makers and transportation analyst are offered
a framework to discuss issues that are related to road network
robustness and vulnerability which goes beyond the disconnected
definitions, indicators and evaluation