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Abbreviations

A | B | C | D | E | F | G | H | I | J | K | L | M | N
O | P | Q | R | S | T | U | V | W | X | Y | Z

Glossary | Traffic Operations Manual

A

AADT Annual Average Daily Traffic
ADA
 Americans with Disabilities Act
ADT Average Daily Traffic
ANSI American National Standards Institute
ASTM American Society for Testing and Materials
AB Assembly Bill
AVL Automatic Vehicle Location
AVO Average Vehicle Occupancy
AWSC All-Way Stop Control

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B

B  

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C

C2C Center-to-Center
CA MUTCD California Manual on Uniform Traffic Control Devices
CAD Computer-Aided Dispatch
CalSAFE
 California Service Authority for Freeway Emergencies/Expressways Committee
Caltrans California Department of Transportation
CAPTI Climate Action Plan for Transportation Infrastructure
CCT Correlated Color Temperature
CCTV Closed-Circuit Television
CEQA California Environmental Quality Act
CG
 Center of Gravity
CHIN Caltrans Highway Information Network
CHP California Highway Patrol
CO Coordinator
CMS Changeable Message Sign
CMSA California Metropolitan Statistical Area
CRZ Clear Recovery Zone
CSDD Complete Streets Decision Document
CVC California Vehicle Code

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D

DD Deputy Directive
DP Director's Policy
DPHD Daily Person Hours of Delay
DTSC Department of Toxic Substances Control
DVHD Daily Vehicle Hours of Delay

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E

EB Eastbound
EMS Emergency Medical Services

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F

FDW Flashing Don't Walk
FHWA Federal Highway Administration
FSP Freeway Service Patrol
ft
 Foot or Feet

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G

GPS Global Positioning System
GVWR Gross Vehicle Weight Rating

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H

HAR Highway Advisory Radio
HCM Highway Capacity Manual
HDM Highway Design Manual
HID High-Intensity Discharge
HOV High-Occupancy Vehicle
HP Horsepower
HR Hour

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I

IES Illuminating Engineering Society of North America
in
 Inches
IRT Incident Response Team
ISOAP Intersection Safety and Operational Assessment Process
ITS Intelligent Transportation System

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J

J  

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K

kg Kilograms

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L

lb Pounds
LRT Light Rail Transit
LPG Liquid Petroleum Gas
LZ Landing Zone

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M

m
 Meters
MASH
 Manual for Assessing Safety Hardware
MIDB Major Incident Database
mm
 Millimeters
MPH Miles Per Hour
MPO Miles Per Hour
MSA Metropolitan Statistical Area
MUTCD Manual on Uniform Traffic Control Devices

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N 

NCHRP National Cooperative Highway Research Program
NHTS National Household Travel Survey
NIMS National Incident Management System
NTCIP National Transportation Communications for Intelligent Transportation System Protocol

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O

OES California's Governor's Office of Emergency Services
OHS Office of Homeland Security
OI Operational Improvement

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P

PAX Passenger
PCAC
 Private Call Answering Center
PCMS Portable Changeable Message Sign
PDPM Project Development Procedures Manual
PDT Project Development Team
PeMS Performance Measurement System
PHD Person Hours of Delay
PID Project Initiation Document
PIN Priority Index Number
PRG Priority Request Generator
PRS Priority Request Server
PSD
 Public Safety Dispatcher
PSDS Public Safety Dispatcher, Supervisor
PY Personnel Year

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Q

Q  

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R

RAMS Remote Agent Messaging System
RFP Request for Proposal
RP Recommended Practice
RV Recreational Vehicle

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S

SAFE
 Service Authority for Freeway Emergencies/Expressway
SB Senate Bill
SCP Signal Control and Prioritization
SEC Seconds
SEMS Standardized Emergency Management System
SER Standard Environment Reference
SHC California Streets and Highways Code
SHS State Highway System
SHSMP State Highway System Management Plan
SR State Route

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T

TAC Technical Advisory Committee
TDM Transportation Demand Management
TIM Traffic Incident Management
TMA Truck-Mounted Attenuator
TMC Traffic Management Center
TMCAL Transportation Management Center Activity Logging
TMS Transportation Management System
TMT Traffic Management Team
TSP Transit Signal Priority
TTY Teletype

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U 

USDOT United States Department of Transportation

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V

VEH Vehicle

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W

WB Westbound

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X 

X  

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Y 

Y  

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Z

Z

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