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

Data Quality White Paper

List of Acronyms

AADT

Annual Average Daily Traffic

ADMS

Archived Data Management System

ATIS

Advanced Traveler Information Systems

AVL

Automated Vehicle Location

Caltrans

California Department of Transportation

CATT Lab

Center for Advanced Transportation Technology Laboratory

CCTV

Closed Circuit Television

FHWA

Federal Highway Administration

FZRA

Freezing Rain

GPS

Global Positioning System

HAR

Highway Advisory Radio

HOT

High Occupancy Toll

IP

Internet Protocol

ISP

Information Service Provider

ITS

Intelligent Transportation System

MAPE

Mean Absolute Percent Error

PDA

Personal Digital Assistant

PeMS

Performance Measurement System

PI

Precipitation Identifier

RADS

Regional Archived Data Server

RMSE

Root Mean Squared Error

RTSMIP

Real-Time System Management Information Program

RWIS

Roadway Weather Information System

SAE

Society of Automotive Engineers

SAFETEA-LU

Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users

SN

Snow

TMDD

Traffic Management Data Dictionary

TMS

Traffic Management System

TTE

Travel Time Estimation

TxDOT

Texas Department of Transportation

VMS

Variable Message Sign

V-SPOC

Volume, Speed, and Occupancy