For More Information

Kevin Balke, Ph.D., P.E.
Research Engineer
System Reliability Division
Texas A&M Transportation Institute
Texas A&M University System
3135 TAMU
College Station, TX 77843-3135
ph. (979) 845-9899 Ext. 59899
k-balke@tti.tamu.edu

Working in conjunction with researchers at Purdue University, TransLink developed a methodology for linking a microscopic simulation model with actual field equipment. Known as hardware-in-the-Loop (HITL), the method provided a mechanism for translating the digital events in a software simulation into physical events that could be recognized by a piece of hardware. These capabilities have been used to optimize existing signal systems, enhance algorithms used in response to particular arterial or corridor traffic situations, research methods for improving emergency service response, and develop a mechanism for examining freeway performance measures in real time.

Today, researchers at TTI have extended the concept to include equipment in the testing loop by creating testbeds that utilize the entire traffic signal cabinet, not just the traffic signal controller.