3G -  Third Generation Mobile Telephony -Third-generation mobile systems combine high-speed access with Internet Protocol (IP)-based services. These devices are typically deemed to be on-line all the time.
 
AASHTO -  American Association of State Highway and Transportation Officials
 
ABS -  Antilock Brake System
 
AFD -  Architecture Flow Diagram
 
AGV -  Automated Guided Vehicle
 
AHS -  Automated Highway System

AID -  Architecture Interconnect Diagram
 
ATIS -  Advanced Traveler Information System
 
AMPS -  Advanced Mobile Phone System
 
ANSI -  American National Standards Institute
 
APTS -  Advanced Public Transportation System
 
ASTM -  American Society for Testing and Materials
 
ATC -  Automatic Train Control
 
ATMS -  Advanced Traffic Management System
 
AVCS -  Advanced Vehicle Control System
 
AVI -  Automated Vehicle Identification
 
AVL -  Automated Vehicle Location
 
AVO -  Automated Vehicle Operation
 
BER -  Basic Encoding Rules
 
BLUETOOTH  -  Short-range radio technology, which makes it possible to transmit signals over short distances between phones, computers and other devices.
 
CAD -  Computer-aided design
 
CAMP -  Crash Avoidance Metrics Partership (consortium of automobile manufacturers)
 
CASE -  Computer Aided Systems Engineering
 
CCTV -  Closed Circuit TV
 
CD -  Compact Disk
 
CDMA -  Code Division Multiple Access
 
CDPD -  Cellular Digital Packet Data
 
CDROM -  CD Read Only Memory
 
CEDEX -  Container Equipment Data Exchange
 
CMS -  Changeable Message System
 
COTR -  Contracting Officer Technical Representative
 
CSP -  Communication Service Provider
 
CV -  Commercial Vehicle
 
CVISN -  Commercial Vehicle Information Systems and Networks
 
CVO -  Commercial Vehicle Operations
 
DAB -  Digital Audio Broadcast
 
DCS -  Distributed Control System - A real-time high speed distributed network of programmable logic Processors and Input/Output control devices. The interaction of these devices is typically determined via an object orientated database.
 
DD -  Data Dictionary
 
DDE -  Data Dictionary Element
 
DFD -  Data Flow Diagram
 
DGPS -  Differential Global Positioning System
 
DMS -  Dynamic Message Sign
 
DMV -  Department of Motor Vehicles
 
DOD -  Department of Defense

DOT -  Department of Transportation
 
DSRC -  Dedicated Short Range Communications
 
DTA -  Dynamic Traffic Assignment
 
E9-1-1 -  Emergency 9-1-1
 
ECPA -  Electronic Communications Privacy Act
 
EDI -  Electronic Data Interchange
 
EMC -  Emergency Management Center
 
EPA -  Environmental Protection Agency
 
EPCS -  Electronic Pre-Clearance Services
 
ESMR -  Enhanced SMR
 
ETA -  Expected Time of Arrival
 
ETC -  Electronic Toll Collection
 
ETS -  Emergency Telephone Services
 
ETTM -  Electronic Toll and Traffic Management
 
FARS -  Fatal Accident Reporting System
 
FCC -  Federal Communications Commission for the U.S.
 
FHWA -  Federal Highway Administration
 
FIPS -  Federal Information Processing Standard
 
FMC -  Freeway Management Center
 
FOT -  Field Operational Test
 
FPR -  Final Program Review
 
FTA -  Federal Transit Administration
 
GIS -  Geographic Information System
 
GPRS -  General Packet Radio Service -The packet-based technology that enables high-speed (115 kilobit per second) wireless Internet and data communications.
 
GPS -  Global Positioning System – a system of satellites orbiting the earth used for communication and position identification.
 
GSM -  Global Solutions for Mobiles (digital Phone typically 900/1800/1900 MGHz)
 
HAR -  Highway Advisory Radio
 
HAZMAT -  HAZardous MATerial(s)
 
HOV -  High Occupancy Vehicle
 
HRI -  Highway Rail Intersection
 
HSR -  High Speed Rail
 
HUD -  Head-Up Display
 
IEEE -  Institute of Electrical and Electronics Engineers, Inc.
 
IP -  Internet Protocol
 
IPR -  Interim Program Review
 
ISO -  International Standards Organization
 
ISP -  Information Service Provider
 
ISTEA -  Intermodal Surface Transportation Efficiency Act
 
ITE -  Institute of Transportation Engineers
 
ITI -  Intelligent Transportation Infrastructure
 
ITS -  Intelligent Transportation Systems
 
ITSA  - or ITS America Intelligent Transportation Society of America
 
ITS-A or ITS Australia Intelligent Transportation Systems Australia

IVHS   - Intelligent Vehicle Highway Systems
 
IVI   - Intelligent Vehicle Initiative
 
IVIS In  - Vehicle Information System
 
LAN  -  Local Area Network
 
LCD  -  Liquid Crystal Display
 
LED  -  Light Emitting Diode
 
LEO  -  Low-Earth Orbit satellite system
 
LPD  -  Liability and Property Damage
 
LRMS  -  Location Reference Messaging Standard
 
LVER   - Light Vehicle Enabling Research
 
MAN -  Metropolitan Area Network
 
MDI -  Model Deployment Initiative
 
MIFARE - a contactless smart card and reader technology developed to handle payment transactions for public transportation systems. Although contact smart cards could also do the job, contactless readers are faster and easier to use, and there is virtually no maintenance on the readers, or wear and tear on the cards.