1. Cobb Pkwy /
Windy Hill Rd
John Pulicare
Alex Harrington
Katelyn Niemann
JAK ENGINEERING SERVICES, INC.
Current Intersection Layout
The Current State of the Intersection
State of the Current Intersection
Windy Hill facing East
Windy Hill westbound congestion

2. Synchro (Current) Actual Phases
Adjust Signal Timing
Optimized Phases
Adjust Signal Timing
Actual LOS
Adjust Signal Timing
Potential LOS
Adjust Signal Timing Alternatives
Additional lanes
Extend left turn lanes Roundabout
F

3. ● Effective for high density left turns
● Effective for intersections where main street has flow similar to cross
street
● 75% more green time for left turns
● 40% more green time for through lanes
Center Turn Overpass (CTO)
Synchro (CTO)
Lower Intersection
Upper Intersection Current Vs New EP New Intersection

4. Lower Intersection Upper Intersection
New Intersection
Both Intersections
Bridges
Environmental
and Community
Impacts
Cobb Pkwy / Windy Hill Rd
Intersection
Wetlands
Source: USFWS Database

5. Floodplains
Source: FEMA Database
Conservation
Areas/Parks/Section 4(f)
Source: NARSAL Database
Protected Species
○ Animal Occurrences:
○ Birds:
○ Ammodramus henslowii (Henslow's Sparrow) *
○ Nyctanassa violacea (Yellow-crowned Night-heron)
○ Ammodramus henslowii (Henslow's Sparrow)
○ Fish:
○ Cyprinella callitaenia (Bluestripe Shiner) *
○ Etheostoma scotti (Cherokee Darter) **
○ Hybopsis sp. 9 (Etowah Chub)
○ Micropterus cataractae (Shoal Bass)
○ Notropis hypsilepis (Highscale Shiner) *
○ Amphibian:
○ Hemidactylium scutatum (Four-toed Salamander)
○ Plethodon websteri (Webster's Salamander)
○ Mollusks:
○ Medionidus penicillatus (Gulf Moccasinshell) **
○ Elliptio arctata (Delicate Spike) *
○ Quadrula infucata (Sculptured Pigtoe)
○ Reptiles:
○ Pituophis melanoleucus melanoleucus (Northern Pine Snake)
○ Crustaceans:
○ Cambarus howardi (Chattahoochee Crayfish) *
Plant Occurrences:
○ Arabis missouriensis (Missouri
Rockcress)
○ Calystegia catesbeiana ssp. sericata
(Silky Bindweed)
○ Cypripedium acaule (Pink Ladyslipper) *
○ Draba aprica (Sun-loving Draba) *
○ Melanthium latifolium (Broadleaf
Bunchflower)
○ Nestronia umbellula (Indian Olive) *
○ Platanthera integrilabia (Monkeyface
Orchid) **
○ Pycnanthemum curvipes (Stone
Mountain Mint)
○ Rhus michauxii (Dwarf Sumac) **
○ Schisandra glabra (Bay Star-vine) *
○ Symphyotrichum georgianum (Georgia
Aster) **
○ Trillium lancifolium (Lanceleaf Trillium)
○ Zanthoxylum americanum (Northern
Prickly-ash)
○ Note: * GA Protected, ** US Protected
Potential Historic
Properties/Section 4(f)
Source: GNAHRGIS Database
Farmland
○ According to the
Geographic Information
Systems (GIS) County
Soil Survey data for
Cobb County, the area of
interest does not
interfere with any
farmland or areas with
prime farmland soils.
Number of
Displacements
○ Potential displacements analysis
is an evaluation to determine the
number of businesses, residents,
and institutions that will need to
be relocated when the project is
constructed. This analysis was
developed to determine the
impact that each of the
alternatives will have if
constructed. No displacement
should be performed considering
the alternatives will not impede on
any existing structures.
Questions?