Savannah GA and Lowcountry SC

Route
I 40 East, I 95 South, I 16 East, I 516 East, Local Roads, US 80 East to Tybee Island.
US 80 West, Local Roads, I 16 West, I 516 West, GA 21 to Port Wentworth GA.
I 95 South, I 16 East, Local Roads to Savannah.
Local Roads, I 16 West, I 516 West, GA 21 to Port Wentworth GA.
I 95 South, I 16 East, US 17 North, SC 170 West to Savannah National Wildlife Refuge.
GA 170 East, US 278 East, US 278 Business East, Local Roads to Hilton Head Island.
US 278 Business West, US 278 West, US 170 East, US 21 South to Hunting Island State Park.
US 21 North, US 21 Business North, US 21 North, US 17 South, I 95 North, I 40 West.

Notes
US 80 ends with a marble plaque indicating that its other end is in San Diego.
The Talmadge Bridge carries US 17 over the Savannah River is an impressive cable stayed suspension bridge. The supports for the old bridge are still present on the east shore of the river.
There is a four mile drive through in the Savannah National Wildlife Refuge off SC 170 just east of the state line. We saw many alligators floating in the canal along the road.
US 278 ends at a traffic circle with US 278 Business.
US 21 ends at Hunting Island State Park.
A new US 21 bridge is being built from Port Royal to Lady Island. US 21 is being widened on Lady Island to the US 21 Business intersection.
The US 21 and US 17 intersection is being rebuilt.

Results
Beaufort County SC, for a new total of 991.
Clinched I 516, US 278 Business Hilton Head Island, US 21 Business Beaufort. Mileage on US 17, US 21, US 80, US 278, GA 21, SC 170.
Highway ends: I 16 East, US 80 East, US 278 East, US 21 South.