E-Squared Engineering

 Parking (EPS)


Guiding Principles for

Electronic Payment Systems (EPS) In Parking

These Guiding Principles have been developed to help guide the Parking industry as it continues to see rapid growth in the area of electronic payment system deployment for on-street, off-street, and garage parking systems.  This includes the usage of smart cards, transponders, cellular based payment schemes, and several other strategies.  Because of this rapid growth, system interoperability becomes a larger and larger issue that must be addressed.   The International Parking Institute (IPI), representing public and private operators of parking systems across the country charged their EPS committee with developing guiding principles to guide the parking industry.  E-Squared Engineering is currently under contract with IPI to obtain nationwide consensus by conducting forums at state and regional parking association conferences across the country.  The principles that we (the IPI EPS Committee) have developed are listed below in their entirety.

E-Squared Engineering



International Parking Institute

These guiding principles have been developed to provide guidance to parking industry stakeholders as they develop and deploy electronic payment systems (EPS) that will increase operating efficiencies and offer greater convenience for the public.  Electronic payment system technologies include but are not limited to smart cards applications (including both contact and contactless technologies), automatic vehicle identification transponders, cellular communication systems, and the Internet.

The International Parking Institute (IPI) realizes the importance of achieving both regional and national interoperability and also understands that some level of deployment ‘migration’ must occur before interoperability is achieved.  It is with these two facts in mind that the guiding principles have been produced.  The ultimate purpose of these principles is for the implementers of EPS technology to measure technology design and purchase decisions against these guiding principles.  Nationwide adherence to these guiding principles for EPS in parking will reduce overall technology costs, increase convenience for the public, and ultimately optimize market penetration.

EPS Guiding Principles for Parking


 ·        Investment and participation in EPS for parking is voluntary.

 ·        EPS parking applications provide system security and payment integrity.

 ·        EPS parking applications have the potential to expand without compromising security.

 ·        EPS parking applications have the capability to integrate with existing information and payment systems.

 ·        EPS parking applications have the capability to accurately audit transactions.

 ·        EPS parking applications have certified clearinghouse interface capability.

 ·        The parking industry implements interoperable EPS systems throughout North America.


 Smart Card Technology

 ·        EPS smart card parking applications have the flexibility to support industry standards for multiple smart card schemes.

 ·        EPS smart card parking applications support on- and off-street parking devices and operations.

 ·        EPS smart card parking applications support multiple card issuers.



 ·        EPS parking applications provide reasonable expectation of privacy regarding access to and use of personal information.  The parties must be reasonable in collecting data and protecting the confidentiality of that data.

 ·        EPS parking application data access shall be controlled and tracked; civil and criminal sanctions should be imposed for improper access, manipulation, or disclosure, as well as for knowledge of such actions by others.



 ·        End users may obtain an EPS device from the operating agency or a compatible EPS device from an independent equipment vendor of the end user’s choice.

 ·        Parking agencies shall work to establish business interoperability agreements among parking programs.

.·        The United States parking community works with the parking communities in Canada and Mexico to implement interoperable EPS systems throughout North America.

 ·        The parking industry works to ensure that EPS systems for parking, where appropriate, are interoperable with other transportation related EPS systems (e.g., electronic toll systems, transit fare collection, etc.) that are in compliance with the National ITS Architecture.

 ·        The parking industry works to ensure that EPS systems for parking, where appropriate, are interoperable with other electronic systems to encourage multi-functionality (e.g., retail applications, identification/access systems, campus cards, etc.).



 ·         The parking industry endorses the use of open standards and interoperability between systems in EPS parking applications.


If you have any questions concerning these guiding principles, send us an email.  If we can’t answer your questions, we’ll tell you who can.  (see the home page for contact information)


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Last modified: November 23, 2004