Task 8. Prepare an interim report which documents the findings of Tasks 1 through 6. An interim report will be completed that will contain the findings and preliminary recommendations from Tasks 1 through 6.

Task 9. Prepare for and conduct first panel meeting. The objective of this task is to provide the opportunity for the panel and advisory group members to the discuss the project and results obtained to date with the research team. The research team will prepare a meeting agenda that will systematically review the evaluation findings, assess the importance of further studies, and narrow the list of viable PPLT displays for further testing. The panel will determine at this meeting which displays will be the focus of further testing and whether the original testing plan is still valid.

Task 10. Prepare a driver confirmation study and implementation study using full-scale dynamic driving simulators located at the University of Massachusetts (UMass) and the Texas Transportation Institute (TTI), the Research Team developed a virtual driving environment to further test driver understanding of select PPLT displays and associated behavior. Study participants were required to navigate a virtual world containing various signal displays, different arrangements and locations, and opposing traffic, with the intent of evaluating driver performance at pre-selected intersections controlled by PPLT displays in an actual driving environment.

Field implementation of an experimental flashing yellow arrow display was conducted to field test a display that had shown promise in safety and driver comprehension in previous task activities and had ranked high in the Engineering Assessment. Volunteer agencies were sought from across the United States to install and operate the experimental flashing yellow arrow display.

Task 11. Prepare second interim report. The objective of this task is to document the results of all previous tasks. The second interim report will contain the findings and recommendations from Tasks 2 through 10.

Task 12. Prepare for and conduct second panel meeting. The objective of this task is to provide the opportunity for the panel and advisory members to discuss the results of the project with the research team. This final panel meeting should result in consensus on the recommended uniform display(s) for exclusive/permissive left-turn.

Task 13. Prepare final report. The research team will prepare a final report that will objectively document the research study methods, their associated findings, and the results of the panel meetings. The report will include appropriate statistical analysis to support the validity of the findings. The report will include a recommended standard(s) for the protected/permitted left-turn display, with supporting justification aimed at convincing practicing traffic engineers on the selection of the proposed standard(s). The final report will also include an implementation plan.