Dynamic flashing yellow arrow (FYA): a study on variable left-turn mode operational and safety impacts phase II - model expansion and testing.

Details

• Creators:
  Abou-Senna, Hatem ; Radwan, Essam ; Eldeeb, Hesham ; Navarro, Alex
• Corporate Creators:
  University of Central Florida. Center for Advanced Transportation Systems Simulation
• Corporate Contributors:
  Florida. Dept. of Transportation. Research Center
• Subject/TRT Terms:
  • Signalized intersections
  • Left turn phase
  • Flashing traffic signals
  • Arrows (Signals)
  • Yellow interval (Traffic signal cycle)
  • Decision support systems
  • Traffic control centers
  • Traffic safety
  • Exclusive permissive phasing
  • Periods of the day
• Resource Type:
  Tech Report
• Geographical Coverage:
  Florida ; United States
• Corporate Publisher:
  Florida. Dept. of Transportation
• Abstract:
  The flashing yellow arrow (FYA) signal display creates an opportunity to enhance the left-turn phase with a ; variable mode that can be changed on demand. The previously developed decision support system (DSS) in ; phase I facilitated the selection of the FYA left-turn mode, changing by time of day at intersections. There was a ; need to continue to refine the interactive framework to improve its service. However, the ultimate objective of ; the continued research of phase II was to demonstrate the ability to execute the automation of the process. Phase ; II of the FYA project provided additional intersection data that refined the work that was previously completed. ; Virtual testing of the DSS was first conducted using VISSIM application programming interface (API) to confirm ; the validity of the procedure and logic. The DSS was then tested in a field testing environment. A custom ; communications software was developed to retrieve instantaneous channel input data, synchronize opposing thru ; green phase, analyze traffic information, provide the algorithm decision, and generate a real-time log recording ; the events. The proposed algorithm is implemented with the goal of safely optimizing traffic operations with ; constant analysis in real-time to determine whether it would be optimal to switch the red arrow to a flashing ; yellow arrow. The algorithm determines the time interval between the successive arrivals of vehicles and ; computes the corresponding headway for each lane by cycle on a second-by-second basis. The DSS was ; ultimately tested at two different intersections in Seminole County. The DSS testing confirmed the applicability ; and validity of the developed DSS as well as the aforementioned procedure, criteria, and logic.
  More +
• Format:
  PDF
• Funding:
  BDV24-977-10
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/30985/dot_30985_DS1.pdf
• File Type:
  [PDF - 16.25 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:a9d8ab9ca9933b302f8ca01d811f52cbbda1bb7798b01f102439c4039d3579e0