S Chien, X. Liu and K. Ozbay, (2003) Predicting Travel Times for the South Jersey Real-Time Motorist Information System, Journal of Transportation Research Board, VOL.1885, NO.1, 32-40..

M Chen, X. Liu, J. Xia and S. Chien, (2004) A Dynamic Bus Arrival Time Prediction Model Based on APC Data, Journal of Computer-Aided Civil and Infrastructure Engineering, VOL.19, NO.5, 364-376..

M Chen and X. Liu, (2005) Using Neural Network to Analyze Passenger Activity and Its Impact on Bus Dwell Time and Travel Time, Journal of Transportation Research Forum, Vol. 44, No. 3, 131-141..

M Chen, X. Liu and J. Xia, (2005) Dynamic Prediction Method with Schedule Recovery Impact for Bus Arrival Time, Journal of the Transportation Research Board, No.1923, 208-217..

M Chen, J. Yaw, S. Chien, X. Liu, (2007) Using Automatic Passenger Counter Data in Bus Arrival Time Prediction, Journal of Advanced Transportation,Vol.41, No.3, 267-283..

S Chien and X. Liu, (2012) An Investigation of Measurement for Travel Time Variability, Intelligent Transportation Systems, VOL. 35, NO. 19, 2236-2238..

Xiaobo Liu, S. Chien, J. Kim, (2012) Evaluation of Floating Car Technologies for Travel Time Estimation, Journal of Modern Transportation, VOL. 21, NO. 1, 49-56..

Xiaobo Liu, SI. Chien, M Chen, (2014) An adaptive model for highway travel time prediction, Journal of Advanced Transportation, Vol. 48, NO. 6, 642-654..

Jincheng Zhu, F Xiao*, X Liu, (2015) Taxis in road pricing zone: should they pay the congestion charge, Journal of Advanced Transportation, Vol. 49, NO. 1, 96-113..

Liuhui Zhao, SI. Chien, X. Liu*, W Liu, (2015) Planning a road weather information system with GIS, Journal of Modern Transportation, VOL. 23, NO. 3, 176-188..