There are plans for commuter rail for Detroit and its suburbs (see SEMCOG Commuter Rail). This station serves intercity ships and commuter boats. Amtrak long distance and commuter rail services originate from Union Station. They were also used on branch, commuter and shorter mainline passenger trains. Sometimes extreme congestion of commuter trains becomes a problem. Secaucus Junction provides access to eight commuter rail lines. Evansville does not have convenient access to commuter rail. Connection between BART and Caltrain commuter rail service is available at Millbrae station. Most major cities have some form of commuter rail network. There are several proposed extensions to current commuter rail lines. Union Station serves as the hub for commuter railway traffic. It identified RRTS for connecting NCR towns to Delhi with fast commuter trains. Salem has a station on the Newburyport/Rockport Line of the MBTA Commuter Rail. A proposal has been passed for the construction of a commuter rail line. These are intercity, regional, commuter and international services.