The South Georgia Parkway was completed circa 1989 and consisted primarily of widening existing two-lane roads to either four-lane divided "near-interstate" or four-lanes with a middle left-turn lane. (Part of the highway that bypasses downtown Albany is interstate quality, however.)
This corridor begins at the Alabama state line (US 280) in Columbus, following US 27/280/SR1 from there to Cusseta (12 miles SE of Columbus), where US 280/SR 520 splits off and runs toward Richland, in eastern Stewart County (17 miles further south).
Once it reaches Richland, US 280 and SR 520 split, the latter proceeding 28 miles to Dawson, in Terrell County. At that point, US 82 and SR 520 become common, running through Albany, Sylvester, Tifton (where it crosses I-75), Waycross, and finally to US 17/SR 25, 8 miles SW of Brunswick. (Total mileage from Dawson to US 17/SR 25: 186.)
SR 520 follows US 17/SR 25 for 6 of those 8 miles. 2 miles south of Brunswick, SR 520 splits off and become the Jekyll Causeway. Finally, SR 520 crosses a newly-constructed bridge over the Jekyll River and ends at the Jekyll Island toll plaza.
SR 520 is desingated with a State Route Marker colored and numbered in green. Some will carry the additional designation "CORR. Z" above the route number. (Picture will be provided ASAP.)
GRAND TOTAL SR 520 MILEAGE: 255 (approx 408 km).