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Glossary of Acronyms Glossary
of Definitions
A B C D E F H L M N O P R S T U V W
AASHTO American
Association of State Highway and
 Transportation
Officials
ACHP Advisory Council
on Historic Preservation
ADT Average Daily Traffic
APE Area of Potential Effect
ASTM American Society of Testing and Materials
AST Above-ground Storage
Tank
ATV All-Terrain Vehicle
AWDT Average Weekday Two-way
Volumes
BA Biological
Assessment
BDL Below Detection Limit
BFE Base Flood Elevation
BMP Best Management Practice
BP Before Present
BRT Bus Rapid Transit
CAA Clean
Air Act
CAP Corrective Action
Plan
CBD Central Business District.
(generally downtown areas)
CDOT Colorado Department
of Transportation
CDOW Colorado Division of
Wildlife
CDPHE Colorado Department
of Public Health and Environment
CEQ Council on Environmental
Quality
CFR Code of Federal Regulations
CFS Cubic feet per second
CLOMR Conditional Letter
of Map Revision
CMAQ Congestion Mitigation
and Air Quality (Federal funds)
CNHP Colorado Natural Heritage
Program
CO Carbon monoxide
CTE Colorado Tolling Enterprise
CWA Clean Water Act
dB(A) A-weighted
Decibel
DIA Denver International
Airport
DMNS Denver Museum of Nature
and Science
DOT U.S. Department of Transportation
DRCOG Denver Regional Council
of Governments
EA Environmental
Assessment
EIS Environmental Impact
Statement
EL Express Lanes
EO Executive
Order
EPA U.S. Environmental Protection
Agency
ESA Endangered Species Act
ESA Environmental Site Assessment
ETL Express Toll Lanes
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FEMA Federal Emergency
Management Agency
FHWA Federal Highway Administration
FIRM Flood Insurance Rate
Map
FONSI Finding of No
Significant Impact
FTA Federal
Transit Administration
HABS/HAER Historical
American Building Survey / Historical
American
Engineering
Record
HC Hydrocarbon
HOA Homeowner Association
HOT High-Occupancy Toll
HOV High-Occupancy Vehicle with more
than one person.
HOV2+ High-Occupancy
Vehicle with two or more persons.
HOV3+ High-Occupancy
Vehicle with three or more persons.
ITS Intelligent Transportation
System
Leq Equivalent
Level (noise)
LOMR Letter of Map Revision
LOS Level of Service
LRT Light Rail Transit
LUST Leaking Underground
Storage Tank
MFAA Mode
Feasibility Alternatives Analysis
MIS Major Investment
Study
MP Milepost
MPO Metropolitan Planning
Organization
MS4 Municipal Separate
Storm Sewer System
MSA Metropolitan Statistical
Area
MSAT Mobile Source Air
Toxins
NAAQS National
Ambient Air Quality Standards
NAFTA North American Free Trade Agreement
NDIS Natural Diversity Information
Source
NEPA National Environmental
Policy Act
NHPA National Historic Preservation
Act
NRHP National Register of Historic
Places
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OAHP Office of Archaeology
and Historic Preservation
OSHA Occupational Safety and
Health Administration
Pb Lead
PM10 Particulate Matter less
than 10 microns in diameter
P-n-R Park-n-Ride
PPI Public/Private Initiative
RAQC Regional
Air Quality Council
RCRA Resource Conservation
and Recovery Act
ROD Record of Decision
ROW Right of Way
RTD Regional Transportation
District
RTP Regional Transportation
Plan
SB 88 Senate
Bill 88
SH State Highway
SHPO State Historic Preservation
Office
SIP State Implementation
Plan
SOV Single Occupant Vehicle
SRHP State Register of Historic
Places
STIP Statewide Transportation
Improvement Program
SWMP Storm Water Management
Plan
TAZ Traffic
Analysis Zone
TCLP Toxicity Characteristic
Leaching Procedure
TDM Travel Demand Management
TEA-21 Transportation
Equity Act for the 21st Century
TIP Transportation Improvement
Plan
TOD Transit-oriented Development
TMO Transportation Management
Organization
TSM Transportation System Management
UCM University
of Colorado Museum
UDFCD Urban Drainage and
Flood Control District
UP Union Pacific
USACE U.S. Army Corps of
Engineers
USAFA U.S. Air Force Academy
USFWS U.S. Fish and Wildlife
Service
VEL
Value Express Lanes
VMT Vehicle
Miles Traveled
VPH Vehicles Per Hour
WPA Works
Progress Administration
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