Abbreviations

Abbreviation	Definition
ADUS	Archived Data User Service
APC	Automatic Passenger Count
ATSPM	Automated Traffic Signal Performance
AVL	Automatic Vehicle Location
DriveNET	Digital Roadway Interactive Visualization and Evaluation Network
DCU	Data Collection Unit
FHWA	Federal Highway Administration
iPeMS	Iteris Performance Management System
ITS	Intelligent Transportation Systems
MPO	Metropolitan Planning Organization
ODOT	Oregon Department of Transportation
PSU	Portland State University
RITIS	Regional Integrated Transportation Information System
TOCS	Transporation Operations Center System
TREC	Transporation Research and Education Center
VAS	Variable Advisory Speed
VMS	Variable Message System
VHT	Vehicle Hours Traveled
VMT	Vehicle Miles Traveled
VPLPH	Vehicles per Lane per Hour
WSDOT	Washington State Department of Transportation

Last Updated: 2020-07-28