A Data Driven Safety Assessment of Various Left Turn Phasing Strategies
PI: Ali Hajbabaie (WSU), ali.hajbabaie@wsu.edu
AMOUNT & MATCH: $40,000 from PacTrans; $40,000 Match
PERFORMANCE PERIOD: 12/15/2016 – 1/31/2018
STATUS: Completed
CATEGORIES: Safety, Operations, Intersections
RESEARCH PROJECT HOT SHEET: 
UTC PROJECT DOCUMENTATION:
FINAL PROJECT REPORT:
DESCRIPTION: This research will use a data-driven methodology to assess the safety of the aforementioned signalization strategies. The results of this research will help decision makers to select a more suitable signal phasing plan/display under various operational conditions. Specific objectives are:
- Compare the safety of protected left turns to protected-permissive left turns with FYA,
- Compare the safety of doghouse displays to four section vertical displays with Flashing Yellow Arrow (FYA), and
- Assess the safety of including FYA phases in protected-permissive left turns at different times of the day to identify if it creates driver confusion.
| DELIVERABLE | DUE DATE | DATE RECEIVED |
| Research Project Progress Report #1 | April 10, 2017 | April 14, 2017 |
| Research Project Progress Report #2 | October 10, 2017 | October 10, 2017 |
| No Cost Extension Request | November 30, 2017 | November 30, 2018 |
| Draft Report | November 30,2017 | October 8, 2018 |
| Final Project Report | January 31, 2018 | October 9, 2018 |
