Union Station is the main train station in Washington, D.C., and handles about 70,000 people each day. It is Amtrak's second-busiest station with 4.6 million passengers annually and serves as the southern terminus for the Northeast Corridor and Acela Express routes. Maryland's MARC and Virginia's VRE commuter trains and the Metrorail Red Line also provide service into Union Station. Expansion plans announced in 2011 will make Union Station the city's primary intercity bus transit center. A new streetcar system opened in 2016.