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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 6301 - 6320 of 36049 results
  • MultiSource Data Fusion for Urban Traffic State Estimation A Case Study of New York City
    Multi-Source Data Fusion for Urban Traffic State Estimation: A Case Study of New York City
    Gao, Jingqin ;
    Ozbay, Kaan
    2018-11-15 | PDF
    Data fusion techniques are often used to enhance traffic state estimations. The objective of this paper is to evaluate and validate the applicability of three different data-driven fusion techniques over a non-trivial urban transportation network. Simple weighted, machine learning and evidence theory based approaches are applied to generate estimat ...
  • Investigation and Development of a Test Level 6 Barrier - Phase I Dataset
    Faller, Ronald K. ;
    Schmidt, Jennifer D.
    2018-11-05 | ZIP
    This dataset supports the final report "Investigation and Development of a Test Level 6 Barrier, Phase I," available at https://rosap.ntl.bts.gov/view/dot/39014Dataset description and software dependencies, provided by NTL staff:This dataset contains 6 .zip file collections described below.Barrier Height Study.zip: This collection contains 17 subfo ...
    Dataset Supporting Files
  • Developing and testing a LED system to improve pedestrian safety in Nevada
    Developing and testing a LED system to improve pedestrian safety in Nevada
    Teng, Hualiang (Harry) ;
    Hu, Bingyi
    2018-11-02 | PDF
    The proposed Light Emitting Diode (LED) pedestrian crossing system is an enhanced pedestrian crossing system that can automate the flashing of LED street light after detecting the presence of pedestrian crossing streets. Comparing the existing pedestrian crossing, the proposed system has the warning by flashing the LED light. In addition, it can de ...
  • Graphical UserInterface GUI for GPRBased AnomalyDetection Algorithm
    Graphical User-Interface (GUI) for GPR-Based Anomaly-Detection Algorithm
    Hayat, Majeed M
    2018-11-01 | PDF
    A Graphical User-Interface (GUI) has been developed that enhances a newly created algorithm that is capable of scanning ground penetrating radar (GPR) data and providing graphical output of GPR anomalies. The capabilities include the ability to select and interpret raw data extracted from RADAN.DZT files and associated metadata, process them, and p ...
  • Evaluation of Asphalt Binder Performance with Laboratory and Field Test Sections
    Evaluation of Asphalt Binder Performance with Laboratory and Field Test Sections
    Karki, Pravat ;
    Zhou, Fujie
    2018-11-01 | PDF
    The current performance-grade (PG) specification for asphalt binders was developed 25 years ago. Over the years, many changes have occurred, including crude oil sources, improved refinery technologies to extract more saturates from crude oil before producing asphalt binders, new additives (such as re-refined engine oil bottoms [REOB], polyphosphori ...
  • Pavement Designs for the Energy Development Areas with Heavy LoadsPart I Flexible Pavements and Part II Rigid Pavements
    Pavement Designs for the Energy Development Areas with Heavy Loads—Part I: Flexible Pavements and Part II: Rigid Pavements
    Zhang, Jun ;
    Im, Soohyok
    2018-11-01 | PDF
    In recent years, rapid energy development in Texas has caused significant damage to many farm-to-market (FM) roads, which traditionally have a thin asphalt surface layer plus a stabilized base directly over the subgrade. These roadways were often rehabilitated with full depth reclamation (FDR) and often 2 to 3 percent cement was added to the pulver ...
  • Evaluation of Trench and Slotted Drain Maintenance and Cleaning Phase 2
    Evaluation of Trench and Slotted Drain Maintenance and Cleaning – Phase 2
    Elzarka, Hazem ;
    Dong, Janet
    2018-11-01 | PDF
    Trench and slotted drains are increasingly being used by ODOT to remove storm water from the roadways. These drains have to be properly cleaned and maintained to efficiently remove storm water from the roadway to prevent vehicles from hydroplaning, and to eliminate flooding. ODOT’s current procedure for cleaning/maintaining trench and slotted drain ...
  • Pavement Surface Treatments for IceProne Locations in the Illinois Highway System
    Pavement Surface Treatments for Ice-Prone Locations in the Illinois Highway System
    Akin, Michelle ;
    Zhang, Yan
    2018-11-01 | PDF
    This project aims to identify and evaluate effective and durable pavement surface treatments (PSTs) suitable for implementation at Illinois Department of Transportation (IDOT) ice-prone locations. A user-friendly questionnaire of northern states and international transportation agencies was developed to capture practitioner insights and collect mor ...
  • Best Practices for Chip Sealing LowVolume Roads in Ohio
    Best Practices for Chip Sealing Low-Volume Roads in Ohio
    Green, Roger ;
    Buss, Ashley
    2018-11-01 | PDF
    Lack of funding and a desire to effectively manage the pavement network has resulted in the widespread use of chip seals by local agencies in Ohio. With the 2002 Construction and Materials Specifications (CMS), the Ohio Department of Transportation’s (ODOT) made major revisions to the chip seal specification to incorporate best practices applicable ...
  • The Integration of the Regional MPO Models into the Georgia Statewide Travel Demand Model Phase 1
    The Integration of the Regional MPO Models into the Georgia Statewide Travel Demand Model – Phase 1
    Circella, Giovanni ;
    Welch, Timothy F
    2018-11-01 | PDF
    The integration between regional and statewide travel demand models (TDMs) can often prove difficult, or even impossible, due to discrepancies in modeling assumptions, inputs, and outputs. Discrepancies in the zonal systems, socioeconomic inputs, and transportation networks limit the ability to provide external travel estimates that can be used in ...
  • Guidelines and Evaluation Framework for Horizontal Curve WetSurface Safety Analysis A User Guide
    Guidelines and Evaluation Framework for Horizontal Curve Wet-Surface Safety Analysis: A User Guide
    Pratt, Michael P. ;
    Geedipally, Srinivas R.
    2018-11-01 | PDF
    The Texas Department of Transportation is increasing its efforts to improve rural highway curve safety by including high-friction surface treatments in the Highway Safety Improvement Program (HSIP). A handful of efforts are underway in the state to install these treatments or others that are intended to improve safety by increasing pavement skid re ...
  • Driver360 A FourDimensional Scanning System to Better Understand Drivers
    Driver360: A Four-Dimensional Scanning System to Better Understand Drivers
    Baek, Stephen
    ORCID ICON IMG
    2018-11-01 | PDF
    The main objective of this project was to construct a four-dimensional (4D = spatial + temporal) scanning system that can be installed in a driving simulator environment. The novel 4D scanning system, named Driver360, comprises 32 digital single lens reflex (DSLR) cameras and captures time-synchronized high-definition (HD) videos (≥ 1080p) of a sub ...
  • Evaluating Countermeasures to Improve Pedestrian and Bicycle Safety
    Evaluating Countermeasures to Improve Pedestrian and Bicycle Safety
    Noyce, David A. ;
    Chitturi, Madhav V.
    2018-11-01 | PDF
    Pedestrian crashes have reached an alarming level in the U.S. Different factors could contribute to the occurrence of these crashes at an intersection, including driver errors, the type of maneuver, and pedestrian behaviors. All these factors highlight the need to develop a traffic warning signal to protect pedestrians and bicyclists at intersectio ...
  • Leveraging Telematics and Weather Data to Study the Productivity of Roadside Mowers
    Leveraging Telematics and Weather Data to Study the Productivity of Roadside Mowers
    Mathew, Jijo K ;
    Morgan, William T
    2018-11-01 | PDF
    The Indiana Department of Transportation (INDOT) is responsible for the construction and maintenance of approximately 11,000 centerline miles of state roads, US routes and interstates. Mowing operations along the state rights-of-way to manage vegetation consume considerable resources. Mowing activities are usually reported by daily work orders and ...
  • A DataDriven Approach to Implementing WrongWay Driving Countermeasures
    A Data-Driven Approach to Implementing Wrong-Way Driving Countermeasures
    Alluri, Priyanka ;
    Wu, Wanyang
    2018-11-01 | PDF
    Wrong-way driving (WWD) crashes are rare and random, and hence, a system-wide deployment of WWD countermeasures requires careful consideration. An actionable and implementable plan is essential to systemically and strategically deploy WWD countermeasures at all the 1,642 off-ramp locations across Florida. It is therefore critical to identify the mo ...
  • Analysis and Potential Solutions to Sediment Deposition in Dean Road Bridge Watershed Midland City AL
    Analysis and Potential Solutions to Sediment Deposition in Dean Road Bridge Watershed, Midland City, AL
    Vasconcelos, Jose G. ;
    Fang, Xing
    2018-11-01 | PDF
    Land use changes in watersheds can create dramatic impacts to the environment as well to existing transportation infrastructure. A severe aggradation process is ongoing in Soapstone Branch, located in Dale County, Alabama, a tributary of the Little Choctawhatchee River. This aggradation has compromised most of the conveyance of the Dean Road Bridge ...
  • Corrosion Prevention of Bridge Tendons Using Flexible Filler Materials
    Corrosion Prevention of Bridge Tendons Using Flexible Filler Materials
    Presuel-Moreno, Francisco J ;
    Castaneda, Carlos
    2018-11-01 | PDF
    Over the last few decades, flexible fillers such as greases or waxes have been used in Europe as an alternative to cementitious grout. The Florida Department of Transportation (FDOT) is considering flexible fillers as an alternative filler material for post-tensioned (PT) tendons. In this study, the corrosion resistance of these fillers to protect ...
  • Online Consumption and Mobility Practices Crossing Views from Paris and NYC Quantitative Survey
    Online Consumption and Mobility Practices: Crossing Views from Paris and NYC: Quantitative Survey
    6T-Bureau de Recherche, France
    2018-11-01 | PDF
    Very little empirical work currently exists on how people are changing their consumption practices and their mobility practices due to the development of e-commerce and the diversity of stakeholders, goods consumed and related delivery methods. The authors conducted a large-scale exploratory survey, in order to obtain new data on the consumption an ...
  • Evaluation of Mobile Apps for Pavement Smoothness Measurement
    Evaluation of Mobile Apps for Pavement Smoothness Measurement
    Lu, Yang ;
    Mishra, Debakanta
    2018-11-01 | PDF
    Measuring the surface roughness of freshly constructed pavements is common practice to ensure that the appropriate agency specifications are met. Contractors as well as state and local transportation agencies commonly use laser-based profilers to quantify the surface roughness for newly constructed pavements. However, these laser-based profilers ar ...
  • Acoustic Emission Monitoring of Prefabricated and Prestressed Reinforced Concrete Bridge Elements and Structures
    Acoustic Emission Monitoring of Prefabricated and Prestressed Reinforced Concrete Bridge Elements and Structures
    Huston, Dryver R. ;
    Dewoolkar, Mandar M.
    2018-11-01 | PDF
    Prefabricated and pre-stressed reinforced concrete beams and girders are integral components of many highway structures, including those build by rapid construction techniques. Concerns exist regarding the development of cracks during curing, form removal, detensioning, transport, installation, and operation. Non-destructive, Acoustic Emission (AE) ...
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