They're functionally residential collector roads, often indicated by the double-yellow centerlines, which handle heavier amounts of through traffic to nearby subdivisions. There are other roads similar to these in Dale City and Lake Ridge as well as throughout suburban Fairfax and Arlington Counties, and tertiary has been established to identify these roads as such.

Though the community might not like it, it's clear by the heavier amount of traffic and more-visible tread marks on the roads that these do form an alternative route from US 29 to Glenkirk Road, bypassing Linton Hall Road. Despite having traffic-calming obstacles like low speeds, speed bumps, and stop signs, these particular roads and the aforementioned examples I gave are still heavily trafficked as through streets and are designed in a way to handle the handful of traffic that uses it as such.