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Research

Project C04 Final Report

Project SHRP 2 C04, Improving Our Understanding of How Highway Congestion and Pricing Affect Travel Demand, reviewed and advanced the state of the practice in modeling the effects of highway congestion and highway pricing on travelers’ decisions, including choices of facility, route, mode, and ti

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Research

Revised Chapter 8, Winter Operations and Salt, Sand and Chemical Management, of the Final Report on NCHRP 25-25(04)

NCHRP Project 25-25(04), Environmental Stewardship Practices, Procedures, and Policies for Highway Construction and Maintenance, was conducted to develop a compendium of practices for integrating environmental stewardship into construction, operations, and maintenance activities (see note below). T
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Research

Analytical Procedures for Determining the Impacts of Reliability Mitigation Strategies

The thrust of the L03 research was the development of methods to predict travel time reliability. The study took a strictly empirical approach to developing these relationships. Two types of models were developed: Predicting Reliability Metrics as a Function of the Mean Travel Time Index and Pred

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Research

Smart Growth and Urban Goods Movement

This report examines the interrelationships between smart growth applications and goods movement, specifically those relationship between land -use patterns and the transportation of goods in the urban environment. The results of the research can be used by decisionmakers to more accurately

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Research

Analysis, Modeling, and Simulation (AMS) Testbed Framework for Dynamic Mobility Applications and ATDM Programs

Both the Dynamic Mobility Applications (DMA) and Active Transportation and Demand Management (ATDM) Programs have similar overarching goals to improve surface transportation system efficiency and individual traveler mobility. However, each program has a unique research approach seeking to meet th

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Informational Product

A Framework for Collaborative Decision Making on Additions to Highway Capacity

TRB’s second Strategic Highway Research Program (SHRP 2) Capacity Projet C01 has released a prepublication, non-edited version of a report titled A Framework for Collaborative Decision Making on Additions to Highway Capacity that describes a framework—including for long-range planning, corri

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Research

Measuring Cement Particle Size and Surface Area by Laser Diffraction

The objectives of this research were to (1) evaluate the practicality and effectiveness of the laser diffraction method to measure the particle size distribution and total surface area of cement powder compared to current methods in use by the state DOTs and (2) prepare a test method to measure part
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Research

2012 Urban Mobility Report

The 2012 Urban Mobility Report builds on previous Urban Mobility Reports with an improved methodology and expanded coverage of the nation’s urban congestion problem and solutions. The links below provide information on long-term congestion trends, the most recent congestion comparisons and a desc

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Research

Annual Urban Mobility Report

The current edition of Urban Mobility Report builds on previous Urban Mobility Reports with an improved methodology and expanded coverage of the nation’s urban congestion problem and solutions. The links below provide information on long-term congestion trends, the most recent congestion comparis

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Research

Automated Enforcement for Speeding and Red Light Running

This report contains a comprehensive assessment of automated speeding and red light enforcement activity in the United States, and provides guidelines for the start-up and operation of automated enforcement programs to reduce speeding and red light running in an effort to improve highway safety.&

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