The 6th International Seminar of Committee of Infrastructure Planning and Management, JSCE in FY2013
2013年度土木計画学研究委員会 第6回国際セミナー（通算 第84回国際セミナー）

Date: September 12, 2013 (Thursday), 17:00-18:00

Venue: Midorigaoka 5th Building 1F Conference room, Tokyo Tech, 東京工業大学創造プロジェクト館1F大会議室
http://www.plan.cv.titech.ac.jp/fukudalab/contact/
（東急大井町線緑が丘駅徒歩8分）

Seminar Title: User-oriented measurement of travel time reliability: concepts and applications

Speaker: Dr. Ioannis Kaparias
(Lecturer, City University of London)
http://www.city.ac.uk/engineering-maths/staff/dr-ioannis-kaparias

Abstract:
This study introduces a new user-oriented measure of travel time reliability for implementation in the dynamic routing algorithm of an intelligent car navigation system. The measure is based on the log-normal distribution of travel time on a link and consists of two indices corresponding to the extreme values of the distribution, such that they reflect the shortest and longest travel times that may be experienced on the link. Through a series of mathematical manipulations, the indices are expressed in terms of the characteristic values of the speed distribution on the link. An expression relating the indices of a route and the indices of the individual links forming it is derived. The accuracy of the measure is then assessed through a field experiment and the results are presented.