[4] The north end of this portion was temporarily set at Shelors Mill in 1931, meaning that 5 miles of present SR 726 (Black Ridge Road) were maintained as a primary state highway for several years.

[15] The remainder survived until 1951, when it too was dropped (becoming SR 787) pending completion of ongoing construction work to improve the road quality.

[18] The Radford end would return to the primary system in 1962 as part of SR 177, a connection to Interstate 81.

[9] SR 104 was extended to the state line in 1934,[22] and North Carolina renumbered NC 800 to match in 1940.

State Route 105 used a portion of present secondary SR 626 (Abram Penn Highway) in Patrick County, beginning at US 58 southeast of Patrick Springs and extending north through Critz for 5.66 miles (9.11 km).

The road was added to the primary state highway system in 1932, with no number given,[24] and assigned SR 105 in the 1933 renumbering, at which time the description indicated that it ran in the direction of Sanville.

[9] Never extended beyond its initial terminus, the road was downgraded to secondary in 1942[25] as an extension of existing SR 626.

2.35 miles (3.78 km) of road south from Axton were added to the state highway system in 1932, with no number given.

[32][33] Another 3.4 miles (5.5 km) were added at the Floyd end in 1932,[34] and in the 1933 renumbering the route became SR 109;[9] the gap was filled later that year.

[39] The Radford end would return to the primary system in 1962 as part of SR 177, a connection to Interstate 81.

In early 1930, an unused 1.5 miles (2.4 km) for Franklin County was assigned to the road from Ferrum in the direction of High Peak (along SR 640 just over the Floyd County line),[49] which received the State Route 219 designation.

This was extended another 3 miles (4.8 km) in early 1931 from mileage that had been assigned to SR 222 but was unneeded; it was now described as being in the direction of Callaway.