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FHWA Home / Safety / Intersection / Signalized Intersections: An Informational Guide

Signalized Intersections: An Informational Guide

List of Acronyms

AADT Average Annual Daily Traffic
AASHTO American Association of State Highway and Transportation Officials
ADA Americans with Disabilities Act
ADAAG Americans with Disabilities Act Accessibility Guidelines
ADT Average Daily Traffic
ATC Advanced Transportation Controller
BCR Benefit-Cost Ratio
BIU Bus Interface Unit
CLA Critical Lane Analysis
CMF Crash Modification Factor
CW Continuous Wave
EB Empirical Bayes
EPDO Equivalent Property Damage Only
FARS Fatality Analysis Reporting System
FHWA Federal Highway Administration
GPS Global Positioning System
HCM Highway Capacity Manual
HSIS Highway Safety and Information System
HSM Highway Safety Manual
IESNA Illuminating Engineering Society of North America
ITE Institute for Transportation Engineers
ITS Intelligent Transportation Systems
LED Light Emitting Diode
LOS Level of Service
MMU Malfunction Management Unit
MMUCC Model Minimum Uniform Crash Criteria
mph mile(s) per hour
MUTCD Manual on Uniform Traffic Control Devices
NCHRP National Cooperative Highway Research Program
NEMA National Electrical Manufacturers Association
NHTSA National Highway Traffic Safety Administration
NTCIP National Transportation Communication for ITS Protocol
PDO Property Damage Only
PHB Pedestrian Hybrid Beacons
PPLT Protected-Permissive Left-Turn
PROWAG Public Rights of Way Accessibility Guidelines
PSI Potential for Safety Improvement
QEM Quick Estimation Method
RF Radio Frequency
RSA Road Safety Audit
RSI Relative Severity Index
SCP Signal Control and Prioritization
SDLC Synchronous Data Link Control
SPF Safety Performance Function
SPUI Single Point Urban Intersection
SSAM Surrogate Safety Analysis Model
STV Small Target Visibility
SUV Sport Utility Vehicle
TCQSM Transit Capacity and Quality of Service Manual
TRB Transportation Research Board
UPS Uninterrupted Power Supply
USDOT United States Department of Transportation
v/c Volume-to-Capacity

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Page last modified on April 1, 2019
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Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000