Common Acronyms

ADA Americans with Disabilities Act
ADT Average Daily Traffic
AVL Automatic Vehicle Locator
CAA Clean Air Act (see EPA's "Plain English Guide"new window)
CAAA Clean Air Act Amendments of 1990
CBD Central Business District
CMAQ Congestion Mitigation and Air Quality fundsnew window
CMS Congestion Management System
CNST Construction (phase of a project)
DOT Department of Transportation
E+C Existing plus committed network (used in modeling)
EA Environmental Assessmentnew window
EIS Environmental Impact Statementnew window
ENG Engineering (phase of a project)
EPA Environmental Protection Agencynew window
FAA Federal Aviation Administrationnew window
FAU Federal-Aid Urban
FHWA Federal Highway Administrationnew window
FRA Federal Railroad Administrationnew window
FTA Federal Transit Administrationnew window
FY Fiscal Year (federal, runs from October to September)
GIS Geographic Information Systems
HOV Highway Performance Monitoring System
HPMS Highway Performance Monitoring Systemnew window
IM Interstate Maintenance funds
ISTEA Intermodal Surface Transportation Efficiency Act of 1991
ITS Intelligent Transportation Systems
IVHS Intelligent Vehicle and Highway Systems (former term for ITS)
LOS Level of Service - performance measure
LRTP Long Range Transportation Plan
MPO Metropolitan Planning Organization
MTA Metro Transit Authoritynew window
NEPA National Environmental Policy Actnew window
NHS National Highway System fundsnew window
NOx Nitrogen Oxidesnew window(ozone-causing pollutants)
PE Preliminary Engineering (phase of a project)
ROW Right-of-Way (phase of a project)
RTA Regional Transportation Authoritynew window
SIP State Implementation Plannew windowfor achieving air quality goals
SR State Route
STA State gas tax funds
STIP Statewide Transportation Improvement Program
STP Surface Transportation Program fundsnew window
TAZ Traffic Analysis Zone (used in modeling)
TCC Technical Coordinating Committee
TDM Transportation Demand Management (also called Transportation Control Measuresnew window, or TCMs)
TDOT Tennessee Department of Transportationnew window
TEA-21 Transportation Equity Act for the 21st Centurynew window
TIP Transportation Improvement Program
TMA Transportation Management Association
TSM Transportation System Management
UPWP Unified Planning Work Program
US DOT United States Department of Transportationnew window
V/C Volume to Capacity ratio - measures roadway congestion
VMT Vehicle Miles Traveled
VOC Volatile Organic Compoundsnew window(air pollutants)
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