TrafficCast Quick Start—BlueTOAD Spectra and Spectra RSU
vi Revision 02 May 2019
Term Meaning
Index-phrase
Standard text used create a message or part of a message for a TIM, defined by ITIS and assigned a
code number—whose meaning is known internationally.
Ingress Going into (entering) an intersection
IoT Internet of Things
IP address Internet Protocol address—host or network interface identification and location addressing
ITIS
International Traveler Information Systems. For ITIS phrase lists to use in creation of TIMs, use
SAE publication SAE J2540-2. To order a copy, go to
https://www.sae.org/standards/content/j2540_200207/
ITS Intelligent Transport System
LAN/WAN Local Area Network/Wide Area Network
MAP
Map Data Message— intersection geography and line definitions of the intersection or street.
An RSU transmits one MAP message per second to OBUs.
NTCIP National Transportation Communications for Intelligent Transportation System Protocol
NTCIP Support
ITS Standard NTCIP 1202 Object Definitions used for communication with Actuated Traffic Signal
Controller (ASC) Units
NTP Network Time Protocol
OBU Onboard Unit
O/D Origin/Destination
Omni-directional Receiving signals from or transmitting in all directions
PCB Printed Circuit Board
PoE Power over Ethernet
PuTTY SSH Client terminal program for Microsoft Windows
RDS Radio Data Service (on FM 57 kHz subcarrier)
RJ-45 Port Registered Jack (RJ) is a standardized telecommunication network interface
RSU Road Side Unit
RTCM
Radio Technical Commission for Maritime services. In the United States, the Federal
Communications Commission uses RTCM standards to specify Differential GPS systems for DSRC.
SCMS
Security Certificate Management System—developed by a consortium of automakers and the United
States Department of Transportation (USDOT) as a leading candidate for a vehicle-to-vehicle (V2V)
security system in the United States.
SNMP
Simple Network Management Protocol—used to monitor and manage devices on networks.
Typically, SNMP uses User Datagram Protocol (UDP) transport layer (layer 4) as its transport
protocol.
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