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

List of Acronyms and Symbols

AADT Average Annual Daily Traffic
CMF Crash Modification Factors
CMP Congestion Management Process (Federal guidelines) or
Congestion Management Program (locally or regionally adopted)
DOT Department of Transportation
FFS Free Flow Speed
FHP Florida Highway Patrol
FHWA Federal Highway Administration
FI Fatal and Injury
GPS Global Positioning System
GIS Geographic Information Systems
HCM Highway Capacity Manual
HOT High Occupancy Toll
HOV High Occupancy Vehicle
ITS Intelligent Transportation Systems
LOS Level of Service
MPO Metropolitan Planning Organization
MTP Metropolitan Transportation Plan
NHS National Highway System
NPMRDS National Performance Management Research Data Set
PCE Performance Car Equivalent
PDO Property Damage Only Crashes
PeMS (California's) Performance Measurement System
PBPD Performance-Based Practical Design
PBPP Performance-Based Planning and Programming
PTI Planning Time Index
SHRP 2 The Second Strategic Highway Research Program
SOV Single Occupant Vehicle
SPF Safety Performance Functions
TIP Transportation Improvement Program
TMA Transportation Management Area
TMC Transportation Management Center
TSMO Transportation System Management and Operations
TTI Travel Time Index
V/C Volume to Capacity Ratio
VHD Vehicle Hours of Delay
VHT Vehicle Hours Traveled
VMT Vehicle Miles Traveled
Office of Operations