[16] The segment northeast of Catlett became part of a realigned SR 28 in the 1940 renumbering,[17] and the remainder was downgraded to secondary in 1949, effective completion of ongoing construction work.

[18] The last mention of the route in the State Highway Commission minutes is in 1951, when a portion of old road bypassed by this construction was abandoned.

[19] State Route 242 extended north from SR 229 near Culpeper over present secondary SR 729 to Ben Venue (former El Dorado Turnpike[citation needed]) and Flint Hill (former Front Royal and Gaines's Cross Roads Turnpike[citation needed]), then turned northeast along present SR 647 (former Salem Station and Rappahannock Turnpike beyond Vernon Mills[citation needed]) to SR 55 near Marshall.

A portion through Cresthill, Jerrys Shop, and Vernon Mills was never a primary route.

State Route 707 was created in 1928, running south from US 211 at Ben Venue to the Rappahannock-Culpeper County line.

[25] Two segments of State Route 718[26][27] were created in 1932, running southwest from SR 55 near Marshall for 2.9 miles (4.7 km) and east from SR 37 (now US 522) at Flint Hill for 4.8 miles (7.7 km)[28] to 0.2 miles (0.32 km) short of the Rappahannock-Fauquier County line[29] (though later maps show it reaching the line[30]).

Both pieces became SR 242 in the 1933 renumbering,[10] and the Marshall end was extended another 3⁄4 mile (1.2 km) later that year,[31] taking it to just beyond Ada.

[36] Culpeper to Flint Hill survived until 1948, when it too was downgraded (to SR 729) pending completion of ongoing construction work south of Ben Venue.

in Washington for 1 mile (1.6 km) in the direction of Bentonville along current secondary SR 622 (no road currently connects Washington to Bentonville directly).

[30] State Route 275 followed the old Hillsborough and Harper's Ferry Turnpike through the Loudoun Valley, now secondary SR 671, from SR 9 at Mechanicsville north to US 340 at the Potomac River near Loudoun Heights.

[57] In December it was restored as State Route 19Y, now extending all the way to modern SR 617.