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The US Transportation Collection consists of documents from across all transportation modes with specific focus on research reports from US DOT, state DOTs, and other transportation organizations. Bookmark this collection: https://rosap.ntl.bts.gov/collection_ust or https://doi.org/10.21949/1530857.

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Showing 7721 - 7740 of 36114 results
  • Implementation of Defect Correction Assessment Methodology on TxDOT Ride Quality Projects Project Summary
    Implementation of Defect Correction Assessment Methodology on TxDOT Ride Quality Projects [Project Summary]
    Fernando, Emmanuel ;
    Hu, Sheng
    2017-08-31 | PDF
    This project follows up on the original development of the defect correction index (DCI) in the Texas Department of Transportation project 0-6610. As part of implementing the DCI methodology for evaluating defect corrections using surface profile measurements, this implementation project conducted additional bump rating panels to verify the origina ...
  • Communicating Information for Traveling on Managed Lane Networks Project Summary
    Communicating Information for Traveling on Managed Lane Networks [Project Summary]
    Wood, Nick ;
    Chrysler, Sue
    2017-08-31 | PDF
    Managed lane networks are complex, interconnected facilities that require advancements in traveler information to successfully serve the users of those facilities. Historically, managed lanes were typically developed for single, distinct corridors, providing preferential access for users who travel from one endpoint to another. The success of past ...
  • Effect of Cycling Skills on Bicycle Safety and Comfort Associated with Bicycle Infrastructure and Environment
    Effect of Cycling Skills on Bicycle Safety and Comfort Associated with Bicycle Infrastructure and Environment
    Oh, Jun-Seok ;
    Kwigizile, Valerian
    2017-08-31 | PDF
    This study seeks to improve the methodology for determining the relationship between cycling dynamic performance and roadway environment characteristics across different bicyclists' skill levels. To achieve the goal of this study, an Instrumented Probe Bicycle (IPB) equipped with various sensors was built. A naturalistic field experiment, including ...
  • Tongass Corridor Geotechnical Asset Management Research
    Tongass Corridor - Geotechnical Asset Management Research
    Beckstrand, Darren L. ;
    Mines, Aine
    2017-08-31 | PDF
    This report documents and presents the results of a study developing a Corridor Health Index that incorporates managed pavement and bridge assets as well as geotechnical assets. Geotechnical assets included rock slopes, unstable soil slopes, and retaining walls. Assessment of these assets adhered to the procedures developed and tested here and in t ...
  • Developing a Surface Drainage Rating for Inclusion in TxDOTs Asset Management System Presentation
    Developing a Surface Drainage Rating for Inclusion in TxDOT’s Asset Management System: Presentation
    Gurganus, Charles F
    2017-08-31 | PDF
    This research developed a surface drainage rating system aided by the collection of data through automated means. The system was tested on a range of Texas Department of Transportation's (TxDOT’s) network to determine adequacy. The rating system can be used at both the network and project levels. This presentation includes information on: data coll ...
  • Engineering Guidelines for Installing Temporary Lines within the Right of Way Project Summary
    Engineering Guidelines for Installing Temporary Lines within the Right of Way [Project Summary]
    Quiroga, Cesar ;
    Holik, William
    2017-08-31 | PDF
    The Texas Department of Transportation (TxDOT) uses two types of lease agreements for installing saltwater pipelines on the right of way. Short-term leases (up to 180 days) are used for aboveground temporary saltwater pipelines, mainly to carry non-produced water. Longer-term leases are used for underground saltwater pipelines, mainly to carry prod ...
  • Compaction of Soils and Base Materials Using Superpave Gyratory Compactors Project Summary
    Compaction of Soils and Base Materials Using Superpave Gyratory Compactors [Project Summary]
    Sebesta, Stephen ;
    Lee, Sang Ick
    2017-08-31 | PDF
    Impact hammer compaction has historically been used to develop moisture-density curves and fabricate specimens for strength testing for flexible base and subgrade materials. But the impact hammer compaction’s precision of compressive strength can cause conflicting test results about whether a material meets specification requirements. This project ...
  • Integrated Crowdsourcing Platform to Investigate NonMotorized Behavior and Risk Factors on Walking Running and Cycling Routes
    Integrated Crowdsourcing Platform to Investigate Non-Motorized Behavior and Risk Factors on Walking, Running, and Cycling Routes
    Al-Fuqaha, Ala ;
    Oh, Jun-Seok
    2017-08-31 | PDF
    There are several factors on the roads that impact bicyclists’ safety. This research aims to find the most important risk factors on roads, mainly in infrastructure facilities, to improve the safety for walkers, runners, and bicyclists. Most mobile cycling applications currently used by cyclists and runners were reviewed in this study in order to g ...
  • Transportation Workforce Health and Wellbeing
    Transportation Workforce Health and Wellbeing
    Lavalliere, Martin ;
    Ellis, Dana
    2017-08-31 | PDF
    The negative health impacts for transportation workers however are not strictly physical. A variety of studies evaluating bus drivers have reported increased levels of stress-related hormones such as cortisol and adrenaline (Aronsson & Rissler, 1998), the effects of which spill over even after working hours (Rydstedt, Johansson, & Evans, 1998). Sev ...
  • Assessing Transit Oriented Development Strategies with a New Combined Modal Split and Traffic Assignment Model
    Assessing Transit Oriented Development Strategies with a New Combined Modal Split and Traffic Assignment Model
    Wang, Guangchao ;
    Chen, Anthony
    2017-08-30 | PDF
    Transit oriented development (TOD) has emerged in recent years as a promising paradigm to promote public transportation, increase active transportation usage, mitigate congestion, and alleviate air pollution. However, there is a lack of analytic studies investigating the benefits of TOD quantitatively. Two major challenges of modeling a multimodal ...
  • NCDOT Customer Service Survey 201617
    NCDOT Customer Service Survey 2016–17
    Findley, Daniel ;
    Anderson, Tracy
    2017-08-26 | PDF
    NCDOT provides transportation services across North Carolina for a variety of functions and uses. NCDOT identified customer satisfaction as a component of its 2015-2017 Strategic Plan, and dashboard, and measured customer service through a statewide survey starting in 2015. An annual survey on key elements of interest to the department provides use ...
  • Deficient Bridges and Safety Information
    Deficient Bridges and Safety Information
    Garder, Per E.
    2017-08-23 | PDF
    The ultimate goal of this project is to reduce human suffering and death caused by unsafe behavior at or near bridges in combination with less-than-optimal geometric design of said bridges. In other words, the emphasis should probably be to look at human factors and their interaction with geometric design and environmental factors including winter ...
  • Impact of Development Density on KFactors
    Impact of Development Density on K-Factors
    Searcy, Sarah ;
    Huegy, Joseph
    2017-08-23 | PDF
    NCDOT’s Transportation Planning Branch seeks to utilize a method to estimate the impact of peak spreading based on capacity constraints that is found in the latest national guidance for traffic forecasting. To fully understand peak spreading impacts, it is necessary to understand how K-factor data changes. A model that tests factors that affect K-f ...
  • A New Look at the Environmental Assessment of Logistics Sprawl Part 1 the Environmental Impact of Urban Road Freight A Modeling Exercise for the Paris Region
    A New Look at the Environmental Assessment of Logistics Sprawl Part 1 the Environmental Impact of Urban Road Freight: A Modeling Exercise for the Paris Region
    Koning, Martin ;
    Coulombel, Nicolas
    2017-08-18 | PDF
    Whereas public deciders often lack detailed information on the volume and on the spatial shape of trips linked to urban road freight (URF), Light and Heavy Goods Vehicles are accused of contributing to a substantial share of the environmental nuisances in cities. By coupling three modeling exercises, this article estimates the amount of carbon diox ...
  • Improving Wildflower Longevity in Roadside Seeding Areas
    Improving Wildflower Longevity in Roadside Seeding Areas
    Schacht, Walter ;
    Soper, Jon
    2017-08-18 | PDF
    The purpose of our research was to test different strategies for establishing and maintaining wildflowers in roadside stands. The objective of the first study was to determine the interacting effects of (1) wildflower seeding rates and (2) spatial segregation of wildflower seeds on establishment of wildflowers on backslopes of roadsides (Experiment ...
  • Innovative BioMediated Particulate Materials for Sustainable Maritime Transportation Infrastructure
    Innovative Bio-Mediated Particulate Materials for Sustainable Maritime Transportation Infrastructure
    Li, Lin ;
    Liu, Shihui
    2017-08-15 | PDF
    he mechanical properties of sandy soils in the coastal area and beach sands often do not satisfy construction expectation for maritime transportation infrastructure. The salty, loose sand makes it difficult for quick construction of port, building and roadway. Sometimes the weakness and unpredictability of loose sand properties can lead to unexpect ...
  • Rapid and NonDestructive Assessment of Levees for Strength and Liquefaction Resistance
    Rapid and Non-Destructive Assessment of Levees for Strength and Liquefaction Resistance
    Wood, Clinton M. ;
    Bernhardt, Michelle
    2017-08-15 | PDF
    Beginning with the first recorded levee construction in 1717 for the small village of New Orleans (Mitchell 1990), the United States levee system has been continuously adapted to respond to changing flood conditions and urban development. Although numerous flood related failures have occurred throughout history, prior to 2005, most of these failure ...
  • Evaluation of Methods for Pavement Surface Friction Testing on NonTangent Roadways and Segments
    Evaluation of Methods for Pavement Surface Friction, Testing on Non-Tangent Roadways and Segments
    de León Izeppi, Edgar ;
    Flintsch, Gerardo W
    2017-08-15 | PDF
    This report presents the research effort to explore the use of continuous friction measurement equipment (CFME) as a tool for pavement friction management to be incorporated into the NCDOT Pavement Management Program to produce a strong Safety Improvement Program. The new tool and processes could supplement and/or replace the traditional locked-whe ...
  • Measurement of Traffic Network Vulnerability for Mississippi Coastal Region
    Measurement of Traffic Network Vulnerability for Mississippi Coastal Region
    Wang, Feng ;
    Bu, Lei 
    2017-08-15 | PDF
    Natural disasters such as a hurricane can cause great damages to the transportation networks and significantly affect the evacuation trip operations. An accurate understanding and measurement of the network vulnerability can enhance the evacuees’ preparedness and responding capabilities during an emergency incident. This study presents a game theor ...
  • Statistical Analysis of Vehicle Crashes in Mississippi Based on Crash Data from 2010 to 2014
    Statistical Analysis of Vehicle Crashes in Mississippi Based on Crash Data from 2010 to 2014
    Wang, Feng ;
    Bu, Lei 
    2017-08-15 | PDF
    Traffic crash data from 2010 to 2014 were collected by Mississippi Department of Transportation (MDOT) and extracted for the study. Three tasks were conducted in this study: (1) geographic distribution of crashes; (2) descriptive statistics of crash data; and (3) probability analysis of crash factors. Geographic Information System (GIS) was applied ...
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