1   Definition

A Description of the state of the road the CAV is traversing inferred by the AMS from information that is internally available and/or received from an external source via a communication channel.

2   Functional Requirements

Road State includes the following information:

  1. Time
  2. The SA reached at Time.
  3. Steering Wheels or Brakes do not respond to a command.
  4. Information about Road state
    • Ice, Wind, Water, Pothole, etc.
  5. Traffic information

3   Syntax




4   Semantics

Label Size Description
Header N1 Bytes Data Type Header
·         Standard 8 Bytes The characters “CAV-RDS-V”
·         Version N2 Bytes Major version – 1 or 2 Bytes
·         Dot-separator 1 Byte The character “.”
·         Subversion N3 Bytes Minor version – 1 or 2 Bytes
RoadStateID N4 Bytes Identifier of CAV instance.
RouteStateData N5 Bytes Set of RoadState Data
·         Pose N6 Bytes Identifier of WayPoint RoadState refers to.
·         CAVState N7 Bytes One of NoWheelResponse, NoBrakeResponse. NoSteeringResponse,
·         RouteEnvironment N8 Bytes One of Ice, Wind, Water, Pothole.
o  TrafficFlow N9 Bytes Traffic Flow
§  TrafficFlowFormatID N10 Bytes Identifier of Traffic Flow Format
§  TrafficFlowData N11 Bytes Traffic Flow Data
·         Time N12 Bytes Time information.
DescrMetadata N13 Bytes Descriptive Metadata

5   Data Formats and Attributes

Traffic Flow Format is required.

6   To Respondents

Respondents are requested to:

  1. Comment on, extend, or reformulate the functional requirements of Road State.
  2. Propose Traffic Flow Format and any other Format.