SBIR-STTR Award

Intelligent Automation Inc. (IAI) proposes an innovative and inexpensive solutions using In-roadway detectors and embedded pavement flashing light warning system to solve the dilemma zone (DZ) problem. Detection is performed by a pair of inductive loops in each travel lane, 800 to 1200 ft from intersection. The detection system includes prediction of vehicle travel time to the intersection and to the beginning and end of the dilemma zone. Our system would also be able to differntiate by vehicle type (car vs. heavy vehicle). Vehicle-specific warning system is comprised of embedded pavement LED in single line in the center of each lane. Processor activates appropriate LEDs if the vehicle is in dilemma zone. This concept is similar to the actuated embedded pavement lights adjacent to busy crosswalks. To avoid calbe cost, communication is performed wirelessly from loops to processor using COTS equipment. Power to the loop will be provided by a COTS battery-solar array system. The control algorithm will incorporate both predictions of when vehicles may be in the dilemma zone and some basic signal control protocols (e.g., phase hold to extend green beyond max). Our proposed system is inexpensive, low risk and will provide addtitional safety for heavy vehicles.

To mitigate the Dilemma Zone (DZ) problem, Intelligent Automation, Inc. (IAI) team proposes an innovative Detection, Control and Warning System (DCWS). In this proposed Phase IIB work, IAI team will deploy and evaluate an enhanced version of DCWS that was designed in earlier phases. DCWS provides vehicle-specific dilemma zone protection based on travel time to the intersection as opposed to more conventional systems which protect a fixed area on the pavement. DCWS employs sensors to track individual vehicles in real time and interface with signal controller to implement advanced signal protocols (e.g., as phase hold to extend green beyond max and all red extensions). DCWS also warns the drivers in advance, who are going to be stuck in the DZ using an advanced warning system. In collaboration with Maryland State Highway Administration (MD SHA) candidate intersection for field deployment will be selected. The field deployment will allow for evaluation of the system design and verification of expected benefits. The results of this study will provide guidance on system design, implementation, and its effectiveness in mitigating the dilemma zone problem. As a part of outreach effort a workshop will be conducted at the end of the project