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Most of these definitions were taken from the HATS/MPO's plans as well as from the Federal Highway Administration. To view a more comprehensive listing of transportation planning terminology, visit the FHWA's website.

The acronyms were derived from the HATS/MPO plans and from the Federal Highway Administration Correspondence Manual.

Transportation Acronyms
AASHO - American Association of State Highway Officials (old name)
AASHTO - American Association of State Highway and Transportation Officials (current name)
ADA - Americans with Disabilities Act
ADH - Appalachian Development Highways
ADHS - Appalachian Development Highway System
ADT - Average Daily Traffic
ALDOT - Alabama Department of Transportation
AMPO - Association of Metropolitan Planning Organizations
ARC - Appalachian Regional Commission
BTS - Bureau of Transportation Statistics
CAA - Clean Air Act
CFR - Code of Federal Regulations
CMS - Congestion Management System
COOP - Continuity of Operations Plan
CTPP - Census Transportation Planning Package
DBE - Disadvantaged Business Enterprise
EA - Environmental Assessment
EA/FONSI - Environmental Assessment/Finding of No Significant Impact
EIS - Environmental Impact Statement
EPA - Environmental Protection Agency
FHWA - Federal Highway Administration
FR - Federal Register
FTA - Federal Transit Administration
FY - Fiscal Year
GIS - Geographic Information System
GPS - Global Positioning System
HOV - High Occupancy Vehicle
ISTEA - Intermodal Surface Transportation Efficiency Act of 1991
ITS - Intelligent Transportation System
LOS - Level of Service
LRTP - Long Range Transportation Plan
MOA - Memorandum of Agreement
MOU - Memorandum of Understanding
MPO - Metropolitan Planning Organization
MSA - Metropolitan Statistical Area
NAAQS - National Ambient Air Quality Standards
NEPA - National Environmental Policy Act
NHS - National Highway System
PE - Preliminary Engineering
PL - Public Law
PS&E - Plans, Specifications, and Estimates
RFP - Request for Proposal
ROD - Record of Decision
ROW - Right-of-Way
SAFETEA - Safe, Accountable, Flexible and Efficient Transportation Equity Act of 2003
SOV - Single Occupant Vehicle
SP&R - State Planning and Research
SR - State Route
TEA-21 - Transportation Equity Act for the 21st Century
TIP - Transportation Improvement Program
TMA - Transportation Management Area
TVA - Tennessee Valley Authority
U.S.C. - United States Code
USC - United States Code
V/C - Volume/Capacity Ratio
VMT - Vehicle Miles Traveled or Vehicle Miles of Travel