State Route 25

State Route 25 represents the counterpart of U.S. 17 throughout most of southeast Georgia. The two overlap from the Florida state line south of Kingsland to Brunswick, Darien, Midway and Richmond Hill. Within Chatham County and the Savannah area, U.S. 17/SR 25 follow Ogeechee Road northeast to Georgetown, Silk Hope and southern reaches of Garden City.

Continuing into Savannah, U.S. 17/SR 25 converge with I-516/SR 21 and U.S. 80/SR 26 at Liberty City. The four routes join I-516/SR 21 (W.F. Lynes Parkway) north. U.S. 17 shifts east from the freeway along I-16 to the Talmadge Bridge spanning the Savannah River. SR 25 remains alongside I-516/SR 21 north to Brampton Avenue in Garden City.

Lining Main Street in Garden City and Coastal Highway through the city of Port Wentworth, the northern 6.75 miles of SR 25 run independent of another route. This portion of SR 25 follows the original alignment of U.S. 17 north to the Houlihan Bridge spanning the Savannah River into Jasper County, South Carolina.

U.S. 17 was realigned off SR 25 (Main Street) in Garden City and from a portion of SR 25 (Coastal Highway) in Port Wentworth in 1993. Providing a higher capacity route, U.S. 17 shifted west along SR 21 (Augusta Road) north to SR 30, and along SR 30 (Bonny Bridge Road) east to Coastal Highway in Port Wentworth. This change was approved by the American Association of State Highway and Transportation Officials (AASHTO) on April 18, 1993. However the following year U.S. 17 was relocated along what was U.S. 17 Alternate across the Talmadge Bridge. AASHTO approved this on November 12, 1994.

North

SR 25 (S Coastal Highway) continues north from SR 307 (Bourne Avenue) along the Georgia Ports Authority - Garden City Terminal.
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Entering the Port Wentworth residential street grid, SR 25 shifts three blocks west from Commonwealth Avenue to Birkenhead Road.
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SR 25 (Coastal Highway) north at Crossgate Road.
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SR 25 continues north from Dorset Road over a Norfolk Southern Railroad spur.
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SR 25 (N Coastal Highway) next meets the east end of SR 30 at Bonnybridge Road.
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SR 30 travels west from Port Wentworth to SR 17, then southeast toward Bloomingdale. The cross state route extends beyond Americus to Marion County.
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SR 30 lines Bonny Bridge Road west 0.94 mile to SR 21 (Augusta Road). U.S. 17 followed Bonny Bridge Road west to SR 21 south in 1993 before shifting onto the Talmadge Bridge.
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SR 25 (Coastal Highway) curves east to the Houlihan Bridge spanning the Savannah River.
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SR 25 continues from the Houlihan Bridge onto Onslow Island.
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Located between the Front and Middle Rivers along the Savannah, Onslow Island is apart of Savannah National Wildlife Refuge.
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Spanning the Middle River, SR 25 (Coastal Highway) advances east onto Argyle Island.
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The Middle and Front Rivers converge south ahead of Hutchinson Island and Savannah.
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SR 25 becomes S.C. 170 midway across the Little Back River into Jasper County, South Carolina.
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South

SR 25 (Coastal Highway) continues S.C. 170 (Alligator Alley) west across the Little Back River into the city of Port Wentworth.
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SR 25 (Coastal Highway) proceeds west across the Middle River onto Onslow Island.
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The James P. Houlihan Memorial Bridge is a swing bridge crossing the Front River of the Savannah River system.
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Curving south by St. Augustine Creek, SR 25 (Coastal Highway) advances to the east end of SR 30 (Bonny Bridge Road).
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SR 30 travels 229.58 miles across South Georgia, mostly along U.S. 280, between SR 25 and SR 41 near Draneville.
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SR 25 (Coastal Highway) elevates across a Norfolk Southern Railroad spur south of Appleby Road. This overpass was replaced in 2011.
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Reassurance marker posted south of Armadale in Port Wentworth.
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SR 307 (Bourne Avenue) arcs 8.47 miles southwest from SR 25 (Main Street) to U.S. 17/SR 25 (Ogeechee Road) at Silk Hope.
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SR 307 follows Dean Forest Road south to air cargo facilities at Savannah / Hilton Head International Airport (SAV) and Garden City Hall.
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This span wire array of vintage traffic lights on SR 25 (Main Street) at Gibbons Road was replaced with a mast arm assembly by 2012.
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SR 21SP (Brampton Road) crosses SR 25 northeast from SR 21 (Augusta Road) to the Port of Savannah.
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SR 21SP along Brampton Road is 1.22 miles long.
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SR 25 (Main Street) south converges with I-516/SR 21 at Burnsed Boulevard in Garden City.
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SR 25 turns south onto Burnsed Boulevard to I-516/SR 21 (Lynes Parkway) and SR 25CO.
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A parclo interchange joins SR 25 (Burnsed Boulevard) with the north end of Interstate 516.
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SR 21 extends north from I-516 along Augusta Road to Port Wentworth and Interstate 95.
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SR 25 joins I-516/SR 21 (W.F. Lynes Parkway) south to U.S. 17 at Ogeechee Road.
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Burnsed Boulevard continues 0.20 miles south from SR 25 at I-516 as SR 25CO to U.S. 80/SR 26.
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