The Silver Line, under construction by the Metropolitan Washington Airports Authority (MWAA) is a 23-mile Metrorail extension connecting the Tysons, Reston, Herndon, and Dulles Airport areas of Fairfax County to the regional Metrorail system. Phase 1 opened in July 2014 with the following stations serving Tysons and Reston:
- McLean Station
- Tysons Corner Station
- Greensboro Station
- Spring Hill Station
- Wiehle-Reston East Station
Phase 2, which is tentatively scheduled to open in 2020, will extend the Silver Line through Reston, Herndon, and Dulles Airport to Route 772/Ashburn in Loudoun County. Phase 2 Silver Line stations in Fairfax County, from east to west, include:
- Reston Town Center Station
- Herndon Station
- Innovation Center Station