Silver Line Phase 1 crews repair a sidewalk along eastbound Route 7 at Westwood Center Drive near the Spring Hill Metrorail Silver Line Phase 1 crews repair a sidewalk along eastbound Route 7 at Westwood Center Drive near the Spring Hill Metrorail Station. courtesy of Dave Johns/Dulles Corridor Metrorail Project. Courtesy of Dave Johns/Dulles Corridor Metrorail Project.