TY - GEN
T1 - Empirical analysis of the dependence structure in traffic data using copula function
AU - Zhao, Tingting
AU - Nie, Yu
AU - Wu, Xing
AU - Zhang, Yi
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/11/17
Y1 - 2014/11/17
N2 - Statistical distributions of link and path travel times are important inputs to reliability-sensitive transportation models. This paper proposes to use copula functions for specifying and calibrating a tractable dependence structure for link travel times. Our empirical study indicates that travel time data tend to have a quasi-tail dependence structure, which is inconsistent with those embedded in commonly used copulas. This means that comparing with traditional fields using copula function, such as financial, traffic data demonstrate special features. A new copula function needs to be proposed to model this newly discovered feature.
AB - Statistical distributions of link and path travel times are important inputs to reliability-sensitive transportation models. This paper proposes to use copula functions for specifying and calibrating a tractable dependence structure for link travel times. Our empirical study indicates that travel time data tend to have a quasi-tail dependence structure, which is inconsistent with those embedded in commonly used copulas. This means that comparing with traditional fields using copula function, such as financial, traffic data demonstrate special features. A new copula function needs to be proposed to model this newly discovered feature.
UR - http://www.scopus.com/inward/record.url?scp=84915782397&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84915782397&partnerID=8YFLogxK
U2 - 10.1109/SOLI.2014.6960690
DO - 10.1109/SOLI.2014.6960690
M3 - Conference contribution
AN - SCOPUS:84915782397
T3 - Proceedings of 2014 IEEE International Conference on Service Operations and Logistics, and Informatics, SOLI 2014
SP - 38
EP - 42
BT - Proceedings of 2014 IEEE International Conference on Service Operations and Logistics, and Informatics, SOLI 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 IEEE International Conference on Service Operations and Logistics, and Informatics, SOLI 2014
Y2 - 8 October 2014 through 10 October 2014
ER -