I would say that this is one of the rare exceptions in which a primary route can terminate with no other connections to a primary road or another highway of a higher classification, due to geographical restrictions. Traffic traveling between Reno/Sparks and Spanish Spanish Springs is funneled into Pyramid Way, which is a very crucial high-traffic commuter route, especially south of La Posada Drive. The only other major highway linking to Spanish Springs would be going 447 to 446 via Wadsworth and Nixon, but these are primarily used by traffic heading to the nearby smaller communities or local rural sprawl.

The other examples of primary spurs like these would be Lake Mead Parkway between Henderson and Lake Las Vegas—aside from the lower-traffic local roads like Galleria, the other way to reach the area would be taking Lake Mead Boulevard or Northshore Road, which are only accessible to Lake Mead NRA traffic—Route 169 to Moapa Valley (for the same reasons as Lake Mead Parkway), and Route 227 between Elko and Spring Creek, as there's no other paved highway between the two.