The western part of this extension had a completed hard surface, while the eastern part had completed grading, but was not surfaced. The next year, the path from Crawfordville to Washington was shifted west to a more direct routing. In 1953, US 378 was designated on the Lincolnton–Washington segment.
The western area of this extension had a paved surface, whereas the eastern part had grading completed but not yet surfaced. The next year, the Crawfordville to Washington route was redirected westward for better connectivity. In 1953, US 378 was designated on the Lincolnton–Washington stretch.