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NOTE— SAE J2366-7LX—ITS Data Bus Application Message Layer Lexicon is now combined (as an appendix) with SAE J2366-7 to provide for a quicker revision process in the future. This SAE Surface Vehicle Recommended Practice defines an Application Message Layer, which may be used as part of a complete protocol stack with the other protocol layers in the SAE J2366 family. The Application Message Layer provides application message support for devices that are interconnected via a bus or network. Design of the messages and headers has stressed flexibility, expandability, economy (in terms of octets on the bus), and reusability. The Application Message Layer is independent of the underlying network used, and may be used on any network. Sections of this document make specific reference to the use of SAE J2366-7 with other layers of the SAE J2366 family of protocols, and may not apply when SAE J2366-7 is used with other networks.

This SAE Information Report describes a reference model for an in-vehicle data bus for Intelligent Transportation Systems (ITS). It introduces the ITS Data Bus (IDB) reference model and describes overall IDB concepts.

This SAE Recommended Practice details the Physical Layer of the Intelligent Transportation Systems (ITS) Data Bus on CAN (IDB-C), which is generally intended for in-vehicle use. It has been developed by the ITS Data Bus (IDB) Physical Layer Subcommittee of the IDB Committee. The objectives of the subcommittee are to develop information reports, recommended practices and standards concerned with the requirements, design, and usage of devices that communicate electronic signals and control information among ITS related components within the vehicle environment. The IDB-C is a non-proprietary virtual-token passing bus, designed to allow disparate consumer, vehicle, and commercial electronic components to communicate and share information across a standard, open data bus. This document describes the Physical Layer of the IDB-C, as shown in Figure 1. The Physical Layer of the IDB-C incorporates the CAN 2.0B specification per SAE J2284-2, with modifications as noted in this document.