DAWSON COUNTY CHAMBER OF COMMERCE MEETING PRESENTATION TOPIC – CONTINUOUS FLOW INTERSECTION (CFI) SR400 @ SR53 July 10th 2014 Presenter: Robert P. Murphy Program Manager D-4
GDOT MISSION 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.
PRESENTATION OUTLINE • Introduction to Continuous Flow Intersection CFI – Background – Concepts – Analysis Tools .
• View Concept Layout • View CFI Animations & Videos • Question/Answer Session
INTRODUCTION • 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 A CFI/DLT is an at-grade intersection that is intended to support large volume of left turns movements and high volume through movements.
Reason for Project • 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.
INTRODUCTION Conventional Intersection
INTRODUCTION Unconventional Intersection (CFI)
8
INTRODUCTION
CFI Typical Turning Movements
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
PROJECT LOCATION- EXISTING CONDITIONS Theatres
Ingles Kroger Wal-Mart
Outlet
Home Depot
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.S PM = F L.O.S.
AM = F L.O.S. PM = F L.O.S.
ANALYSIS TOOLS Microscopic Simulation Model - VISSIM
•Used to analyze SR400 @ SR53 (CFI intersection) due to its geometric complexities
Traffic Optimization Tool - SYNCHRO •Used to analyze surrounding traditional intersection geometries •Used to develop optimal signal timing and phasing
VIEW GDOT CONCEPT LAYOUT P.I.# 132790 APD00-0056-01(063) SR400 @ SR53 CFI
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 CFI Project Manager Mr. Robert P. Murphy
MGMT ROW Date
Authorized
FFPR Date
May 2014
Letting Date
November 2014
Anticipated Mobilization Date Construction Duration
January 2015
12-18 Months
QUESTIONS????
P.I. #0007169 SR 136 @ Etowah River Bridge Replacement Project Manager Mrs. Davida White
MGMT ROW Date
December 2014
FFPR Date
April 2015
Letting Date
September 2015
Anticipated Mobilization Date Approved Detour for duration of project.
December 2015
9 Months
P.I. #0007030 SR 9 @ Etowah River Bridge Replacement Project Manger Mr. Otis Clark
MGMT ROW Date
February 2014
FFPR Date
July 2014
Letting Date
December 2014
Anticipated Mobilization Date No Detour during Construction Phase
March 2015
Project Duration 18- 24 Months