Alternative Subway is a term used to describe public transportation options that are alternatives to traditional subway systems. The three most common alternatives are buses, metros, and stiles. Buses are the most widely used form of public transportation, providing a low-cost option for commuters. Metros are similar to buses but are typically faster and more efficient. Stiles are a type of elevated railway system that is often used in urban areas. All three of these alternative subway systems provide an efficient and cost-effective way to get around cities.