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SAE J2735-Draft-Rev29 [issued: 12-11-08]
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252 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
Road Sign Example
This sample packet contains two generic road signs. The first road sign has a single valid region defined
by a four-point polygon. The second road sign’s valid region is a circle.
The basic content of the signs is the text string included in their “content” sections.
The signs also contain the optional off-board URLs for descriptive images. Some vehicles may be able to
retrieve these images through an alternative mechanism – WiMax, WiFi, Cellular modem, etc., or by way
of the TCIP/IP stack over DSRC.
Figure 4: Road Sign Example
Application and Use with DSRC
Network User
Network Users generate individual advisory or road sign messages. Network users need to assign unique
identifiers or “Advisory Numbers” to advisories. Road signs, however, are intrinsically identified by their
location, direction and MUTCD code. The individual messages are then propagated into the backhaul
network and eventually to the Road Side Unit (RSU). It is expected that this transmission will use the
defined XML message formats of this standard and TCIP/IP for such transfers.