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SAE J2735-Draft-Rev29 [issued: 12-11-08]
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This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
Figure 10: Large Weather Advisory
Annex E Traffic Probe Message Use and Operation
Probe Data Introduction
Probe Data is comprised of vehicle attribute and sensor data that is collected and sent from a vehicle OBU
to a local RSU. This data will be used to ascertain real time road, weather, and traffic conditions. The post-
processed data will be used to advise vehicles approaching the area of current conditions and suggest
appropriate action. This data is collected autonomously as vehicles are traveling along the roadway system
and sent to an RSU when applicable. The probe message developed by the SAE-DSRC Traffic and
Traveler Information Subcommittee discussed earlier in this standard, describes the payload and format of
the Probe Data Message. This Annex describes when the OBU should collect Probe Data from the
vehicle’s internal modules/sensors as well as when and how an OBU should send the data.
Probe Message Structure
A Probe Message is transmitted from a vehicle to a RSU, which contains several snapshots, as well as the
standard J2735 message header information, that is a PSID and a PSC. That is:
A Provider Service Identifier (PSID) a number that identifies a service provided by an application
and