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Physical Characteristics |
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Study Area
The Interstate System Plan (ISP) study area includes all of the Interstate Routes, interchanges, and major connecting roads in Georgia in the immediate vicinity of the Interstate System with the exception of those within thirteen counties in Metropolitan Atlanta. Traffic movement through the Atlanta Metropolitan area will be considered in the evaluation of the Interstate System, but specific recommendations for improvement will lie outside of the Atlanta area. |
NHS, GRIP, STAA, STRAHNET
The National Highway System (NHS) includes highways considered to be important to the nation's economy, defense, and mobility. It includes the Strategic Highway Network (STRAHNET) which specifically provides access, continuity, and emergency capabilities for defense purposes. The Surface Transportation Assistance Act (STAA) routes are designated as routes to facilitate the movement of freight. The Governors' Road Improvement Program (GRIP) is a road widening program to ensure that 98 percent of all areas of Georgia are within 20 miles of a four-lane road. |
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Pavement Roughness
The International Roughness Index (IRI) is used to measure pavement surface condition as part of the Highway Performance Monitoring System (HPMS). The IRI is reported in inches of bumps per mile of road. The higher the IRI the rougher the road. |
Bridge Conditions
Bridges in Georgia are monitored through the assignment of a sufficiency rating. A sufficiency rating is calculated based on the bridge's capacity, condition, and geometry. A sufficiency rating below 50 is considered to be in need of replacement. |
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2001 Estimated V/C Ratios
Volume to Capacity (V/C) ratios are an indication of congestion. The higher the V/C ratio, the more congested a roadway. Typically, a v/c ratio of 0.9 is considered the threshold for congestion in urban areas while 0.7 is considered congested in rural areas. |
TPRO Projects
This graphic depicts locations for proprosed future improvement of Georgia’s Interstate System as maintained through the Tpro database.
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Freight |
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Truck Volumes
Truck volumes on Georgia’s Interstate System tend to be higher in urban areas versus rural areas. |
Truck Usage
Truck percentages on Georgia’s Interstate System tend to be higher in rural areas versus urban areas. |
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Existing Conditions |
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Statewide Powerpoint Presentation
The study area (excluding the 13-county Atlanta metro area) was divided into nine corridors and four sub corridors to examine capacity, safety, system preservation, and connecivity.
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Corridor 1 Power Point Presentation
Information on fraffic volumes, facilities, safety and future confestion for Interstate 75 in South Georgia.
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Corridor 2 Power Point Presentation
Information on traffic volumes, facilities, safety and future congestion for Interstates 75 and 475 in Central Georgia. |
Corridor 3 Power Point Presentation
Information on traffic volumes, facilities, safety and future congestion for Interstates 75, 24 and 59 in Northwest Georgia.
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Corridor 4 Power Point Presentation
Information on traffic volumes, facilities, safety and future congestion for Interstate 20 in West Georgia. |
Corridor 5 Power Point Presentation
Information on traffic volumes, facilities, safety and future congestion for Interstates 20 and 520 in East Georgia.
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Corridor 6 Power Point Presentation
Information on traffic volumes, facilities, safety and future congestion for Interstates 85 and 185 in West Central Georgia. |
Corridor 7 Power Point Presentation
Information on traffic volumes, facilities, safety and future congestion for Interstates 85 and 985 in Northeast Georgia.
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Corridor 8 Power Point Presentation
Information on traffic volumes, facilities, safety and future congestion for Interstate 16 from Macon to Savannah. |
Corridor 9 Power Point Presentation
Information on traffic volumes, facilities, safety and future congestion for Interstate 95 in Coastal Georgia.
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