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SAE J2735-Draft-Rev18 [issued: 06-26-07]
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This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
3.79 Semiactuated Operation: A type of traffic control signal operation in which at least one, but not all,
signal phases function on the basis of actuation
3.80 service channel: Secondary channels used for application-specific information exchanges.
3.81 service table: A data store containing the pertinent information about applications available through
the WAVE device.
3.82 Signal Head: An assembly of one or more signal sections
3.83 Signal Phase: The right-of-way, yellow change, and red clearance intervals in a cycle that are
assigned to an independent traffic movement or combination of movements
3.84 Signal System: Two or more traffic control signals operating in signal coordination
3.85 Signal Timing: The amount of time allocated for the display of a signal indication
3.86 SPAT: In the context of this standard, Signal Phase And Timing, a message type which descibes the
current state of a signal system and its phases.
3.87 Split (phase): Definition to be refined by committee.
3.88 stability control: A system which operates to prevent a car from sliding sideways under dynamic
driving conditions.
3.89 station: Any device that contains an IEEE 802.11 conformant medium access control (MAC) and
physical layer (PHY) interface to the wireless medium. An RSU and OBU are stations.
3.90 stop line: Definition to be refined by committee.
3.91 syntax: The structure of expressions in a language, and the rules governing the structure of a
language.
3.92 transactions: Bi-directional data exchanges between devices (RSUs and OBUs).
3.93 value domain: A well known range of values, or terminology, or enumeration that many be
referenced as an abstract type the ITS data register but no longer used. There are very many value domains
used in ITS standards.
3.94 vehicle host: A device connecting to the WAVE system through the OBU vehicle host interface.
3.95 vehicle type: In the context of this standard the vehicle type is a data element used to define overall
gross size and mass of a vehicle, Observe that this definition differs from the (multiple other) vehicle types
defined elsewhere in other standards used in the ITS.