What is it like to work at Subway?

Will someone please explain to me what bus and subway transfers are and how they work?

• I have an idea what they are but I can not find anything online that explains to me exactly what they are and how they work. I get offered them sometimes on buses by the bus drivers saying "do you need a transfer?" and I have no idea what they are asking. Someone please explain this to me!

• Answer:

  from wikipedia: Transfers Many companies offer transfers that allow the rider who pays for a single-trip fare to continue the trip on another bus or train. Depending on the network, there may or may not be an additional fee for the transfer. Most transfers are stamped or hole-punched with the time, date, and direction of travel to prevent their use for a return trip. Some public transport companies may honor transfers purchased from another company with connecting service.