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Title:

North Carolina’s First Quadrant Left: History and Lessons Learned
Cover of North Carolina’s First Quadrant Left: History and Lessons Learned

Accession Number:

01557784

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

North Carolina’s first Quadrant Left roadway project was recently constructed in Huntersville, a suburb of Charlotte. This paper will outline the history of this innovative intersection design in North Carolina, describe the benefits of quadrant roadways, and explain the history of the subject Quadrant Left intersection. The subject Quadrant Left intersection was previously a complex all-movement signal causing significant delays and backups onto a nearby congested Interstate. There were significant public and media concerns with the proposed design including concerns with access to area businesses, navigation, and introduction of additional traffic signals. This Quadrant Left was designed and constructed due to successful capacity analysis and design, input from other Quadrant Left projects in the United States, and perseverance of project stakeholders. Initial observations included concerns with compliance and improper navigation, however these issues were controlled with additional signing and pavement markings, improved access control, and improved motorist familiarity with the design. After two years of operation, the Quadrant Left project has successfully met its expected goals based on operational capacity analysis and safety analysis after construction. Continuous public outreach and education, greater motorist familiarity, and improved national designs were deemed essential throughout project development. This case study may be used as a template for other potential Quadrant Left projects in the United States.

Supplemental Notes:

This paper was sponsored by TRB committee AHB65 Operational Effects of Geometrics.

Monograph Accession #:

01550057

Report/Paper Numbers:

15-2138

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Reese, Michael P
Carroll, Justin T
Epperson, Sean M

Pagination:

15p

Publication Date:

2015

Conference:

Transportation Research Board 94th Annual Meeting

Location: Washington DC, United States
Date: 2015-1-11 to 2015-1-15
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Maps; Photos; References; Tables

Uncontrolled Terms:

Quadrant roadway intersections

Geographic Terms:

North Carolina

Subject Areas:

Design; Highways; Operations and Traffic Management; I21: Planning of Transport Infrastructure; I73: Traffic Control

Source Data:

Transportation Research Board Annual Meeting 2015 Paper #15-2138

Files:

PRP, TRIS, TRB, ATRI

Created Date:

Dec 30 2014 12:46PM