Recurring Traffic Bottlenecks: A Primer
Focus on Low-Cost Operational Improvements (Fourth Edition)
List of Abbreviations and Symbols
AASHTO – Americans Associated of State and Highway Transportation Officials
ARM – Annual Reliability Matrix
ATM – Active Traffic Management
BII – Bottleneck Intensity Index
Caltrans – California Department of Transportation
CBI – Congestion and Bottleneck Identification
CDOT – Colorado Department of Transportation
CLT – Contraflow Left Turn
CMAQ – Congestion Mitigation and Air Quality
CMP – Congestion Management Process
COBRA – Colorado Bottleneck Reduction Assistance
CSMP – Corridor System Management Plan
DCD – Double Crossover Diamond
DDI – Diverging Diamond Interchange
DE – Design Exception
DJC – Dynamic Junction Control
DLG – Dynamic Lane Grouping
DLM – Dynamic Lane Merge
DLT – Displaced Left-Turn
DOT – Department of Transportation
DRLT – Dynamic Reversible Left Turn
FDOT – Florida Department of Transportation
FHWA – Federal Highway Administration
GP – General Purpose
GPS – Global Positioning System
HEP – Hazard Elimination Program
HOT – High Occupancy Toll
HOV – High Occupancy Vehicle
HSIP – Highway Safety Improvement Program
HSP – Highway Safety Program
HSR – Hard Shoulder Running
ITRE – Institute for Transportation Research and Education
ITS – Intelligent Transportation Systems
LBR – Localized Bottleneck Reduction
MnDOT – Minnesota Department of Transportation
MOPAC – Missouri and Pacific
mph – Miles Per Hour
MPO – Metropolitan Planning Organization
MTTI – Mean Travel Time Index
MUT – Median U-turn
NAAQS – National Ambient Air Quality Standards
NPMRDS – National Performance Management Research Data Set
ODOT – Ohio Department of Transportation
pcphpl – Passenger Cars Per Hour Per Lane
PDO – Property Damage Only
PDSL – Priced Dynamic Shoulder Lane
PennDOT – Pennsylvania Department of Transportation
PTI – Planning Time Index
QR – Quadrant Roadway
RCUT – Restricted Crossing U-Turn
RIDOT – Rhode Island Department of Transportation
SHA – State Highway Agency
SHSP – Strategic Highway Research Program
SIP – Statement Implementation Plan
STARS – Strategically Targeted Affordable Roadway Solutions
STM – Spatiotemporal Matrix
TCP – Traffic Control Plan
TDM – Travel Demand Management
TIM – Traffic Incident Management
TIP – Transportation Improvement Plan
TMC – Traffic Management Center
TSMO – Transportation Systems Management and Operations
TTI – Travel Time Index
TxDOT – Texas Department of Transportation
V/C – Volume/Cost
VDOT – Virginia Department of Transportation
VHT – Vehicle Hours of Travel
VMT – Vehicle Miles of Travel
VPL – Vehicles Per Lane
WSDOT – Washington State Department of Transportation
WTP – Washington Transportation Plan
