Multilevel Modelling of Commercial Vehicle Inter- Arrival Duration Using GPS Data Bryce W. Sharman, Ph.D. Department of Civil Engineering, University of Toronto 35 St George Street, Toronto, Ontario, M5S 1A4, Canada Tel: +1 416-978-5049; Fax: +1 416-978-6813 E-mail: bryce.sharman@mail.utoronto.ca Matthew J. Roorda, Associate Professor * Department of Civil Engineering, University of Toronto 35 St George Street, Toronto, Ontario, M5S 1A4, Canada Tel: +1 416-978-5976; Fax: +1 416-978-6813 Email: roordam@ecf.utoronto.ca * Corresponding Author Preprint for the paper: Sharman, B. and Roorda, M.J. (2013). Multilevel Modelling of Commercial Vehicle Inter-Arrival Duration Using GPS Data. Transportation Research Part E: Logistics and Transportation Review. 56(2): 94-107.