Travel time variability is increasingly being recognized as a major factor influencing travel
decisions and, consequently, as an important performance measure in transportation
management. In this research project, we examine a number of questions related to travel
time variability: How should travel time variability be quantified at both the section level as
well as at the route level?; How do travelers value travel time and its reliability?; How much
does the travel time reliability contribute to travelers' route choices?; How much variation is …