Office of Operations
21st Century Operations Using 21st Century Technologies

Approaches to Forecasting the Third Performance Management Rulemaking (PM3) Measures for Target Setting

List of Acronyms

AAWDT—Annual Average Weekday Traffic

AAWET—Annual Average Weekend Traffic

BPR—Bureau of Public Roads

CFR—Code of Federal Regulations

CMAQ—Congestion Mitigation and Air Quality Improvement Program

DOT—Department of Transportation

FAST—Fixing America’s Surface Transportation

FHWA—Federal Highway Administration

ITS—Intelligent Transportation System

LOTTR—Level of Travel Time Reliability

LRTP—Long-Range Transportation Plan

MAP-21—Moving Ahead for Progress in the 21st Century Act

mph—miles per hour

MPO—Metropolitan Planning Organization

MTTI—mean travel time index

NHS—National Highway System

NPMRDS—National Performance Management Research Data Set

pcphpl—passenger cars per hour per lane

PHED—Peak Hour Excessive Delay

PM3—Third Performance Management Rulemaking

SHRP 2—Strategic Highway Research Program 2

SOV—Single Occupancy Vehicle

STIP—Statewide Transportation Improvement Program

TDF—Travel Demand Forecasting

TDM—Travel Demand Model

TMC—Traffic Message Channel

TTI—travel time index

TTTR—Truck Travel Time Reliability


VDF—volume-delay function

VDOT—Virginia Department of Transportation

VMT—vehicle-Miles traveled

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