This SAE Standard specifies a message set, and its data frames and data elements, specifically for use by applications intended to utilize the 5.9 GHz Dedicated Short Range Communications for Wireless Access in Vehicular Environments (DSRC/WAVE, referenced in this document simply as “DSRC”) communications systems. Although the scope of this Standard is focused on DSRC, this message set, and its data frames and data elements, have been designed, to the extent possible, to be of potential use for applications that may be deployed in conjunction with other wireless communications technologies as well. This Standard therefore specifies the definitive message structure and provides sufficient background information to allow readers to properly interpret the message definitions from the point of view of an application developer implementing the messages according to the DSRC Standards.
This Standard is the fifth edition of the message set dictionary. The changes made from prior editions include revising the content to reflect a uniform use of unaligned packed coding rules, a common message framework, the further refinement of several existing messages due to deployment experience, and the addition of a preliminary Personal Safety Message for use with vulnerable road users. This amendment to the standard was issued in March of 2016 to clarify how positional offsets were calculated in some data frames. Two typographical errors were also corrected at that time.
The document areas affected by this limited scope revision are as follows:
Section 6.82 Data Frame: DF_PathHistory, Page 79 In the Use section,
Section 6.84 Data Frame: DF_PathHistoryPoint, Page 80 In the Use section
Section 6.84 Data Frame: DF_PathHistoryPoint, Page 80 In the ASN.1 Representation section
Section 7.127 Data Element: DE_OffsetLL-B18, Page 171 In the Use section,
Section 7.195 Data Element: DE_TimeOffset, Page 202 In the Use section
Section 7.224 Data Element: DE_VertOffset-B12, Page 214 In the Use section
Section 8.58 Data Element: EXT_ITIS_Codes [ITIS], Page 240 In the ASN.1
Section 11.8 Lanes, Objects Defined in Intersections and Elsewhere, Page 263 In the last paragraph on this page.