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Greater Portland Transit District (METRO) 
Owned and operated by the Greater Portland Transit District, provides public fixed route transportation in Portland, Westbrook, Falmouth Crossing and the Maine Mall area of South Portland. METRO operates seven days a week.
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Portland Explorer
Operated by VIP Tour and Charter Bus Company and administered by the Greater Portland Council of Governments, provides public fixed-route express bus service between Portland's transportation terminals, hotels and The Maine Mall.
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ShuttleBus
Inter-city bus service between Biddeford and Portland, via Old Orchard Beach, Scarborough and the Maine Mall (South Portland).
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