 Some numbers (50, 90), which had become effectively U.S. routes (1 and 64 respectively) were moved or eliminated while others that conflicted with established U.S. route numbers in the state were changed to non-conflicting numbers.This seems to have been done without regard to the earlier numbering system, as were all future additions to the state highway system, which is where the modern "lack of any system" system came to be.In 1937, several routes were renumbered to be contiguous with South Carolina routes, and in 1940 the same happened with Virginia.