A major transportation center planned for Springfield that would provide staging for buses and car pools and parking for a future Metro station and a Virginia Railway Express station will be the subject of a public hearing at 7:30 p.m. Tuesday at Forestdale Elementary School in Springfield.

According to plans, the Franconia-Springfield Transportation Center would provide 1,800 parking spaces in a six-level parking structure, 12 bus bays, 90 kiss-and-ride spaces and 15 HOV parking spaces.

That includes parking and staging areas for bus service to the Pentagon and Van Dorn Street Metro stations, space for car pool staging, parking to support a future Virginia Railway Express commuter rail station, and 25,000 square feet of space for commuter-oriented facilities.

Such facilities could include a day-care center or library branch.

The center is also planned so that it could be integrated with a future Franconia-Springfield Metro station should money become available to extend Metrorail beyond the Van Dorn Street station.

Money for the proposed $46 million project would come from the Urban Mass Transportation Administration's Suburban Mobility Incentives Program and from Fairfax County.

The county would need to match one-third of the transportation administration's $16 million grant, as well as cover any cost overruns.

The remainder of the money would come from a $25 million bond issue that will be on the ballot in the November general election.

Voter approval of the measure is vital to the project, according to Mark Fuhrmann, head Metro liaison and head of technical assistance for the Fairfax County Office of Transportation.

Metro officials say they are optimistic about securing the necessary funds.

The transportation administration, the Washington Metropolitan Area Transit Authority, the Metro board, Fairfax County and the Army Corps of Engineers all would need to sign off on the project before construction could begin.

Barring problems, the final plan is expected to be complete by the spring of 1992. Construction would begin that year, and the center would be in operation in 1994, Fuhrmann said.

Metro will be seeking comments on three aspects of the plan at the hearing: the deletion of surface parking from the original plan, general comments on the revised plan and the environmental impact of the center, Fuhrmann said.