In 2002, a regional light rail system was proposed to use the tunnels; the system would cost $2.6 billion and take thirty years to build. The tunnels were favored because they were in an ideal location, they could easily be used to connect the east side and the west sides of Cincinnati, and they would have saved the city at least $100 million in construction costs at the time. The light rail plan, called MetroMoves, proposed a tax levy that would have raised sales tax in Hamilton county by a half-cent. The plan was voted down by more than a 2-to-1 ratio, with 68% opposing MetroMoves. Still, an underground portion of the Riverfront Transit Center was built to serve the proposed, unbuilt MetroMoves lines; this transit center was later served by another Cincinnati streetcar line, the Cincinnati Streetcar.