TOPIC – CONTINUOUS FLOW INTERSECTION (CFI)

SR400 @ SR53

July 10th 2014

Presenter: Robert P. Murphy Program Manager D-4

DAWSON COUNTY CHAMBER OF

COMMERCE MEETING PRESENTATION

To Provide a Safe Connected and Environmentally Sensitive Transportation System That Enhances Georgia’s Economic Competitiveness by Working Efficiently and Communicating Effectively to Create Strong Partnerships.

GDOT MISSION

• Introduction to Continuous Flow Intersection CFI

– Background

– Concepts

– Analysis Tools.

• View Concept Layout

• View CFI Animations & Videos

• Question/Answer Session

PRESENTATION OUTLINE

• Continous Flow Intersection (CFI) concept developed about 20 years ago

• Also referred to as Displaced Left Turn (DLT)

• Locations for CFIs in Planning, Design, Construction or Operation

– United States

• 1st CFI in the U.S. was built in Long Island, New York

• Arkansas, Georgia, New York, Louisiana, Maryland, Mississippi, Missouri, Ohio, Texas, Utah, Virginia

– International

• Over 40 Locations in Mexico

INTRODUCTION

INTRODUCTION

A CFI/DLT is an at-grade intersectionthat is intended to support large volume of left turns movements and high volume through movements.

• There is a need to adequately accommodate

future capacity @ SR 400 and SR53

• Reduce Delay Times at this Intersection

• Cost Effectiveness compared to Original

Fly-Over Project.

Reason for Project

Conventional Intersection

INTRODUCTION

8

Unconventional Intersection (CFI)

INTRODUCTION

CFI Typical Turning Movements

INTRODUCTION

ADVANTAGES

• Handles significantly more capacity than conventional at-grade intersection designs.

• Substantial savings over grade-separated alternatives while providing equal or better performance.

• Can be deployed in one-, two-, three-, and four-legged versions.

• Reduces the number of conflict points

• Provides clear lines of sight, avoiding the visual barriers created by overpasses.

• Helps reduce pollution by reducing congestion.

• Requires shorter construction time and less utility relocation

PROJECT LOCATION

Outlet

Kroger

Home Depot

Wal-Mart

Theatres

Ingles

PROJECT LOCATION- EXISTING CONDITIONS

TRAFFIC COUNTS

BASE YEAR (2016) ADT DESIGN YEAR (2036) ADT

SR400 38,350 62,800

SR53 20,000 32, 650

Level of Service (LOS)

No Build Conditions 2036 Build Conditions 2036

SR400/SR53 AM = F L.O.S.PM = F L.O.S.

AM = C L.O.S.PM = D L.O.S

SR53/Lumpkin Campground Rd.

AM = F L.O.SPM = F L.O.S.

AM = F L.O.S.PM = F L.O.S.

Microscopic Simulation Model - VISSIM•Used to analyze SR400 @ SR53 (CFI intersection) due to its geometric complexities

ANALYSIS TOOLS

Traffic Optimization Tool - SYNCHRO•Used to analyze surrounding traditional intersection geometries •Used to develop optimal signal timing and phasing

P.I.# 132790APD00-0056-01(063)

SR400 @ SR53 CFI

VIEW GDOT CONCEPT LAYOUT

VISSIM Animations & Project Videos

SR400 @SR53 CFI DRIVER’S VIEW ANIMATION

Dawson County, GA

SR400 @ SR53 PROJECT ANIMATION

Dawson County, GA

AIRLINE HIGHWAY @ SIEGEN LANE CFI DRIVER’S VIEW VIDEO

Baton Rouge, LA

BATON ROUGE CFI PUBLIC COMMENTS

Baton Rouge, LA

BATON ROUGE CFI PUBLIC COMMENTS

P.I. #132790 SR 400 @ SR 53 CFIProject Manager Mr. Robert P. Murphy

MGMT ROW Date Authorized

FFPR Date May 2014

Letting Date November 2014

AnticipatedMobilization Date

January 2015

Construction Duration

12-18 Months

QUESTIONS????

P.I. #0007169 SR 136 @ Etowah RiverBridge Replacement

Project Manager Mrs. Davida White

MGMT ROW Date December 2014

FFPR Date April 2015

Letting Date September 2015

Anticipated Mobilization Date

December 2015

Approved Detour for duration of project.

9 Months

P.I. #0007030 SR 9 @ Etowah RiverBridge Replacement

Project Manger Mr. Otis Clark

MGMT ROW Date February 2014

FFPR Date July 2014

Letting Date December 2014

Anticipated Mobilization Date

March 2015

No Detour during Construction Phase

Project Duration 18- 24 Months