The southern terminus of SR 662 is just south of an intersection with US 29 (Lee Highway), just west of Interstate 66.

This road curves around housing developments to the front of the Sully Station shopping center, where the name changes to Westfields Boulevard.

Prior to 1990, SR 662 followed Poplar Tree Road across VA 28 and the southern section of Chantilly.

The completion of the widening of Route 28 (plus the construction of the north end of Sully Station shopping center) made Poplar Tree Road discontinuous, separating its Centreville and Chantilly sections.

Westfields Boulevard had been built in the late 1980s, but the SR 662 designation was not officially moved onto it until nearly twenty years later.