A "Travel Pass" is a document or digital ticket that allows individuals to use public transportation services, such as buses, trains, or subways, within a specific area or for a certain period. It often provides unlimited travel options, making it a cost-effective choice for frequent travelers or tourists exploring a city. Travel passes can vary in duration, ranging from single-day passes to monthly or annual options. Many cities offer these passes to encourage the use of public transport, reduce traffic congestion, and promote environmentally friendly travel. Popular examples include the London Oyster Card and the New York City MetroCard.