The halted funding places the Hudson Tunnel and Second Avenue Subway projects at risk of delays. The Second Avenue Subway extension is intended to expand service north into East Harlem, a long-awaited expansion first proposed nearly a century ago. “The Gateway Tunnel and Second Avenue Subway aren’t political trophies — they are lifelines. The Gateway Development Commission (GDC), which oversees the Hudson Tunnel, confirmed the federal government has paused disbursements. “In the meantime, we remain focused on keeping the project on scope, schedule and budget.”The Second Avenue Subway project has a long and troubled history.