The state highway passes its namesake, the Virginia Theological Seminary, just west of its intersection with Quaker Lane, which heads north as SR 402. SR 420 continues east as Janneys Lane, a two-lane undivided street that passes to the north of the Gerald R. Ford Jr. House on its way to its eastern terminus at SR 7 (King Street).
The state highway intersects with Virginia Theological Seminary just west of Quaker Lane, which continues north as SR 402. SR 420 travels east as Janneys Lane, a two-lane undivided street that passes the Gerald R. Ford Jr. House on its journey to King Street at SR 7.