Improved Safety and Efficiency of Protected/Permitted Right-Turns in Oregon

Hurwitz, David; Monsere, Chris; Kothuri, Sirisha; Jashami, Hisham; Buker, Kamilah; Kading, Andrew; Oregon State University. School of Civil and Construction Engineering; Portland State University. Dept. of Civil & Environmental Engineering

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Improved Safety and Efficiency of Protected/Permitted Right-Turns in Oregon

2018-05-01
By Hurwitz, David ; Monsere, Chris ; Kothuri, Sirisha ; ...

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English

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Details:

Creators:

Hurwitz, David ; Monsere, Chris ; Kothuri, Sirisha ; Jashami, Hisham ; Buker, Kamilah ; ... More +

Hurwitz, David ; Monsere, Chris ; Kothuri, Sirisha ; Jashami, Hisham ; Buker, Kamilah ; Kading, Andrew Less -
Corporate Creators:

Oregon State University. School of Civil and Construction Engineering ; Portland State University. Dept. of Civil & Environmental Engineering

Oregon State University. School of Civil and Construction Engineering ; Portland State University. Dept. of Civil & Environmental Engineering Less -
Corporate Contributors:

Oregon. Dept. of Transportation. Research Section ; United States. Federal Highway Administration

Oregon. Dept. of Transportation. Research Section ; United States. Federal Highway Administration Less -
Subject/TRT Terms:

[+]

(FYA) Arrows (Signals) Flashing Traffic Signals Flashing Yellow Arrow Human Factors Pedestrian Movement PPRT Protected/Permitted Right Turns Right Turn Lanes Right Turns Safety Signalized Intersections Traffic Flow Traffic Operations
Publication/ Report Number:

FHWA-OR-RD-18-14
Resource Type:

Tech Report
Geographical Coverage:

Oregon
Corporate Publisher:

Oregon. Dept. of Transportation. Research Section
NTL Classification:

NTL-OPERATIONS AND TRAFFIC CONTROLS-Traffic Control Devices;NTL-SAFETY AND SECURITY-Highway Safety;
Abstract:

This research aimed to develop an understanding of the safety and operational implications of using the flashing yellow arrow (FYA) in permitted and protected/permitted right turn (PPRT) operations to maximize safety and efficiency. This report includes a review of more than 50 scientific and technical articles on the selection of right turn phasing alternatives and a review of Oregon crash data at intersections with exclusive right-turning lanes from 2011-2013. The study had three phases: 1) a web-based survey, 2) a microsimulation model, and 3) and a driving simulator study. The survey measured Oregon driver’s comprehension of right-turn signal display. Analysis revealed a general misunderstanding of the required driver response for the steady red arrow signal indication, but comprehension of the FYA for right turns was high. The microsimulation model of several PPRT phasing alternatives indicated that the pedestrian volumes had the greatest effects on delays. The driving simulator experiment indicated that driver responses were relatively consistent with those observed in the web-based survey. The results suggest that Oregon transportation agencies might improve driver-yielding behavior and pedestrian safety at signalized intersections with high volumes of permissive right turns from exclusive right-turn lanes by using the FYA display in lieu of a steady circular green display.
Content Notes:

Project Summary at: https://trid.trb.org/view/1420162 lists SPR 789 as Contract No. for Project.
Format:

PDF
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:11fdef5583de2a94ed9355e8b4ea6bac70134f5c5f4541f116d435562e5bcae5
Download URL:

https://rosap.ntl.bts.gov/view/dot/35996/dot_35996_DS1.pdf
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Improved Safety and Efficiency of Protected/Permitted Right-Turns in Oregon

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