On Tuesday, Fairfax Board of Supervisors will vote on the county's financial participation in Phase 2 of the Dulles Metro line as Virginia budgeteers haggle over whether to provide additional funding. The 23 mile Silver Line will extend rail service from the East Falls Church Metro station to the Dulles Airport. Metropolitan Washington Airports Authority is building the rail extension. Phase 1, pictured below, has a price tag of $2.7b. Construction of Phase 1 is nearly 70% complete, and MWAA estimates the project will be done by late next year.