cross over CSX's Andrews Subdivision before SC 41 splits to the north on a tangent curve. The U.S. Highway meets the southern end of SC 908 south of Brittons Neck before it curves east and crosses the Little Pee Dee River into Horry County. US 378 expands to a four-lane road with center turn lane shortly after passing Conway-Horry County Airport and enters the city of Conway as Wright Boulevard. West of downtown, the U.S. Highway has an oblique intersection with Church Street, which carries US 501 through the intersection and US 701 north of the intersection. Southbound US 701 continues south on Church Street to a ramp to 4th Avenue while northbound US 701 runs concurrently with US 378 from 4th Avenue, which heads west as US 701 toward Georgetown and east as SC 905. US 378 curves northeast, becomes 3rd Avenue, and reduces to two lanes as it enters the Conway Downtown Historic District, where it reaches its eastern terminus at US 501 Business (Main Street) next to the Old Conway County Courthouse. History In the early part of the 21st century, the bridge crossing the Georgia–South Carolina state line over the Savannah River was deemed to be "structurally deficient". It wasn't until 2014 that Alabama-based Scott Bridge Company began construction on a replacement for the bridge. It wasn't determined that the bridge was in danger of collapse; rather, the term was used in reference to a possible crack or split in the concrete of the bridge. Construction began in April 2010. However, in 2012, construction was halted due to a "rare chemical reaction", known as delayed ettringite. This condition caused the support columns of the bridge to swell up and begin splitting. It was the first time this condition was ever encountered in Georgia. It was discovered after personnel from GDOT, Scott Bridge Company, and scientists from the Georgia Institute of Technology conducted a thorough examination of the bridge and supporting structure. In Spring 2014, construction resumed, using a new method in which water cools freshly-poured concrete while it cures. The $36.2 million bridge opened on December 21, 2016. South Carolina Highway 54 South Carolina Highway 54 (SC 54) was a state highway that was established around 1926 from SC 3 (now US 76 Business) in Sumter east to SC 4 (now US 301) in Turbeville. In 1929, it was extended to the east to end at