Decision-Making Guide for Traffic Signal Phasing

The objective of this research was to develop an engineering decision-making guide that incorporates both safety and operational impacts in evaluating traffic signal phasing alternatives for conventional intersections. NCHRP Web-Only Document 284, Decision-Making Guide for Traffic Signal Phasing, is available at Examples of Signal Phasing Alternatives that are addressed: (1) Left Turns (Protected Only v. Protected/Permitted v. Permitted Only, Leading v. Lagging, Split Phasing, Changes in phasing based on time of day or traffic conditions, Treatment of multiple left-turn lanes) (2) Right Turns (Overlaps with complementary left turns, Treatment of dual right turn lanes) (3) Pedestrians (Concurrent v. Exclusive, Leading Pedestrian Indication) (4) Interactions (Elimination of permitted left turns and right turns on a conflicting pedestrian actuation, Conflicts between U-Turns and Right Turns)


  • English


  • Status: Completed
  • Funding: $600000
  • Contract Numbers:

    Project 03-118

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway & Transportation Officials (AASHTO)

    444 North Capitol Street, NW, Suite 225
    Washington, DC  United States  20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Project Managers:

    Derr, B

  • Performing Organizations:

    VHB Engineering, NC, P.E.

    4000 WestChase Boulevard, Suite 530
    Raleigh, NC  United States  27607
  • Principal Investigators:

    Daily, Christopher

  • Start Date: 20150813
  • Expected Completion Date: 20190831
  • Actual Completion Date: 0
  • Source Data: RiP Project 37563

Subject/Index Terms

Filing Info

  • Accession Number: 01543349
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 03-118
  • Files: TRB, RIP
  • Created Date: Nov 13 2014 1:01AM