ISO 12855:2015

ISO 12855:2015 specifies
-      the interfaces between electronic fee collection (EFC) systems for vehicle related transport services, e.g. road user charging, parking and access control; it does not cover interfaces for EFC systems for public transport; an EFC system can include any EFC system, e.g. including systems that automatically read licence plate numbers of vehicles passing a toll point,
-      an exchange of information between the central equipment of the two roles of service provision and toll charging, e.g.
-      charging related data (toll declarations, billing details),
-      administrative data, and
-      confirmation data,
-      transfer mechanisms and supporting functions,
-      information objects, data syntax and semantics,
-      examples of data interchanges (see Annex C and Annex D), and
-      an example on how to use this International Standard for the European Electronic Tolling Service (EETS) (see Annex F).
ISO 12855:2015 is applicable for any toll service and any technology used for charging.
It is defined as a toolbox standard of transactions and Application Protocol Data Units (APDUs), which can be used for the assigned purpose. The detailed definitions of mandatory and optional elements in a real implementation are defined elsewhere. It does not define all communication sequences, communication stacks and timings.
The scope of ISO 12855:2015 is illustrated in Figure 2. The data types and associated coding related to the data elements described in Clause 6 are defined in Annex A, using the abstract syntax notation one (ASN.1) according to ISO/IEC 8824-1.