1. Department of Civil, Architectural, and Environmental Engineering, University of Texas at Austin, Ernest Cockrell, Jr., Hall (ECJ) 6.2, 1 University Station C1761, Austin, TX 78712.
2. School of Civil and Environmental Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia.
3. Research Centre for Integrated Transportation Innovation, CE110 School of Civil Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia.