| Development of a queue warning system utilizing ATM infrastructure system development and field-testing J Hourdos, Z Liu, P Dirks, HX Liu, S Huang, W Sun, L Xiao Minnesota Department of Transportation, 2017 | 14 | 2017 |
| Freeway queue warning system J Hourdos, Z Liu US Patent 10,783,787, 2020 | 6 | 2020 |
| A rule-based signal compensation strategy for the non-bus-priority approaches at an intersection Z Liu, W Qiao, J Liu, D Yang CICTP 2015, 2007-2017, 2015 | 3 | 2015 |
| Freeway Traffic Queue-Warning System: Deployment and First Impressions P Dirks, Z Liu, J Hourdos Transportation Research Board 96th Annual MeetingTransportation Research Board, 2017 | 2 | 2017 |
| Evaluation of the Minnesota Queue Warning System, MN-QWARN J Hourdos, M Duhn, Z Liu, G Parikh Transportation Research Board 100th Annual MeetingTransportation Research …, 2021 | 1 | 2021 |
| Design, specification, implementation and evaluation of a real-time queue warning system Z Liu | 1 | 2017 |
| Design, specification, implementation and evaluation of a freeway queue warning system Z Liu, P Dirks, J Hourdos 2017 5th IEEE International Conference on Models and Technologies for …, 2017 | | 2017 |
| Optimal model for university classroom assignment to reduce traffic volume Z Liu Third International Conference on Innovative Computing Technology (INTECH …, 2013 | | 2013 |
