·         Dynamics and mechanics in rail transit system ·         Planning and design, construction, operation, inspection, and maintenance of rail infrastructures ·         Train operation, control, scheduling and management ·         Traction power supply, transmission and control ·         Rail transit electrification and automation ·         Railway signaling and communication ·         Superconductivity and levitation technology ·         Magnetic suspension and evacuated tube transport ·         Environmental impacts of transportation ·         Roads, bridges, tunnels, and underground engineering ·         Subgrade and pavement maintenance and performance ·         Urban transit systems ·         Urban traffic planning, control and management ·         Intelligent transportation system (ITS) and information technology ·         Traffic and transport safety ·         Traffic flow theory ·         Pedestrian studies ·         Interdisciplinary transportation research.