Office of Operations
21st Century Operations Using 21st Century Technologies

Synthesis of Active Traffic Management Experiences in Europe and the United States

Table of Acronyms

ATM

Active Traffic Management

CCTV

Closed Circuit Television

DMS

Dynamic Message Sign

FHWA

Federal Highway Administration

GP

General Purpose

HOT

High Occupancy Toll

HOV

High Occupancy Vehicle

ITS

Intelligent Transportation System

LCD

Lane Control Display

LED

Light Emitting Diode

MUTCD

Manual on Uniform Traffic Control Devices

NTCIP

National Transportation Communications for ITS Protocol

O&M

Operations and Maintenance

PM

Preventive Maintenance

PS&E

Plans, Specifications and Estimate

SOP

Standard Operating Procedure

SOV

Single-Occupant Vehicle

TDM

Travel Demand Management

TMC

Traffic Management Center

TMS

Transportation Management System

UPS

Uninterruptible Power Supply

US

United States

VMS

Variable Message Sign

VSL

Variable Speed Limit