==Types of Systems==
Automated fare media can come in a variety of formats and can even include credit and debit cards. One key point to remember is that there are two types of systems: open and closed. Open systems accept payment through fare media issued by an entity outside of the transit system, such as a bank or a university. Closed systems accept payment forms
only issued by that system.
Transit system management of fare collection can be a costly endeavor and there may be some advantages to outside management of the fare payment system. However, with credit and debit cards, some of the advantages of prepayment will be lost.<ref>Transit Cooperative Research Project. [http://www.trb.org/main/blurbs/153815.aspx “Report 32: Multipurpose Transit Payment Media.” 1998.]</ref>