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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 4801 - 4820 of 36908 results
  • Analysis of Vibrations in a Structure due to Passing Trains Using a Coupled Finite Element and Multibody Dynamics Model
    Analysis of Vibrations in a Structure due to Passing Trains Using a Coupled Finite Element and Multibody Dynamics Model
    Foster, Craig
    2020-08-29 | PDF
    Ground-borne vibrations in structures due to passing trains are an ongoing issue in the rail industry. While in extreme cases such vibrations can lead to structural fatigue and failure, occupant comfort is usually the controlling factor. With the advent of higher-speed rail as well as the increasing value of urban real estate near train tracks, acc ...
  • Quantifying Intermodal Facility Capacity Factor Interactions through Simulation
    Quantifying Intermodal Facility Capacity Factor Interactions through Simulation
    Dick, C. Tyler ;
    Chen, Wesley
    2020-08-29 | PDF
    Intermodal hubs play an important role in the operation of railway networks. Intermodal freight is a primary revenue stream for Class I railroads in the United States. Intermodal traffic volume has increased approximately 10 percent since 2011 and reached new all-time record volumes during the summer of 2017. This growth combined with shifts in tra ...
  • Computational Analysis of Railroad Ballast Settlement
    Computational Analysis of Railroad Ballast Settlement
    Foster, Craig
    2020-08-29 | PDF
    In this paper, finite element (FE) structural dynamics algorithms are used along with multibody systems (MBS) techniques to develop detailed railroad track substructure models to analyze the differential settlement in the ballast due to dynamic cyclic loading conditions. A cap plasticity material model is used in order to capture the geotechnical b ...
  • Results of a Survey on Transportation Safety Equity in Hawaii
    Results of a Survey on Transportation Safety Equity in Hawaii
    Prevedouros, Panos D ;
    Nunes, Flavia
    2020-08-28 | PDF
    Five transportation equity questions were developed for this assessment. Question 1 addressed EMS response in urban and rural areas. People with a bachelor’s degree or higher thought slightly more that rural response is worse. Rural residents believed it is worse and half of urban residents agreed. CSET minority respondents thought that rural respo ...
  • Support for Caltrans Statewide Mobile Terrestrial Laser Scanning MTLS System Usage
    Support for Caltrans Statewide Mobile Terrestrial Laser Scanning (MTLS) System Usage
    Yen, Kin S. ;
    Lasky, Ty A.
    2020-08-28 | PDF
    This research supported Caltrans Office of Land Surveys’ (OLS) update of Chapter 15 of the Caltrans Survey Manual and creation of the Caltrans MTLS Guidelines document. In addition, the research contributed to firmware/software updates on both the Trimble MX8 and Riegl VMX1HA MTLS systems, the integration of a Ladybug 5+ 360-degree camera to the MX ...
  • Evaluation of the MGS Placed 6 in Behind a 6in Tall AASHTO Type B Curb To MASH TL3
    Evaluation of the MGS Placed 6 in. Behind a 6-in. Tall AASHTO Type B Curb To MASH TL-3
    Ronspies, Kellon ;
    Rosenbaugh, Scott
    2020-08-27 | PDF
    The use of curbs along roads is often required for certain functions such as drainage control, right-of-way reduction and sidewalk separation. However, curbs along roadways can adversely affect the interaction of errant vehicles with roadside barriers. Curbs placed near guardrail systems increase the propensity for vehicle override, vehicle underri ...
  • Understanding Attention Management and Driver Decision Behavior at ShortStorage Rail Grade Crossings
    Understanding Attention Management and Driver Decision Behavior at Short-Storage Rail Grade Crossings
    Veinott, Elizabeth ;
    Linja, Anne
    2020-08-26 | PDF
    The goal of this project was to focus on understanding driver attention and decision-making behavior at short-storage highway-rail grade crossings (HRGCs) compared to non-short storage HRGCs. While rail safety has improved from the mid-1990s to 2010 (Yeh & Multer, 2008), the decreasing trend has flattened over the last 10 years (Tey, et al., 2013). ...
  • Selecting the Most Feasible Construction Phasing Plans for Urban Highway Rehabilitation Projects
    Selecting the Most Feasible Construction Phasing Plans for Urban Highway Rehabilitation Projects
    Choi, Kunhee ;
    Jeong, H David
    2020-08-25 | PDF
    Despite the abundance of research that has aimed to understand the effects of highway work zones, very little definitive information is available concerning the determination of work zone length (WZL). Quantitative studies that holistically model WZL are very rare. To fill this gap, this study identifies critical factors affecting WZL and develops ...
  • Driver Impairment Detection and Safety Enhancement Through Comprehensive Volatility Analysis
    Driver Impairment Detection and Safety Enhancement Through Comprehensive Volatility Analysis
    Khattak, Asad J. ;
    Arvin, Ramin
    2020-08-21 | PDF
    The ubiquity of sensors and increasing computational resources has enabled monitoring driver, vehicle, and roadway surroundings. A key objective of this research is to extract useful information from multi-dimensional data streams coming in from sensors. The has developed a framework for obtaining, processing, and analyzing high-frequency multi-dim ...
  • CapacityFlow FeatureBased Restoration Strategy Optimization for Resilient Transportation Systems To Enhance Mobility Accessibility and Equity After Disruptive Events
    Capacity-Flow Feature-Based Restoration Strategy Optimization for Resilient Transportation Systems To Enhance Mobility, Accessibility, and Equity After Disruptive Events
    Zhao, Tingting ;
    Zhang, Yu
    2020-08-20 | PDF
    Disruptive events lead to capacity degradation of transportation infrastructure, and a good restoration plan can minimize the aftermath impacts during the recovery period. This is considered one aspect of resiliency for transportation systems. Although unmet demand has been proposed as one measure of resilience for freight transportation, it has ra ...
  • Taming and Tapping the Bikeshare Explosion Review of Shared Micromobility Laws
    Taming and Tapping the Bikeshare Explosion: Review of Shared Micro-mobility Laws
    Pimentel, David ;
    Koglin, Timothy
    2020-08-15 | PDF
    This project analyzed the various laws pertaining to shared micro-mobility systems, such as bike-share and scooter-share. In order to examine the relevant laws in all 50 states, the research team developed a list of questions related to sharing platforms. Data were collected in nine categories—Definitions, Age Restrictions, Safety Equipment, Licens ...
  • Development of a MichiganSpecific VISSIM Protocol for Submissions of VISSIM Modeling
    Development of a Michigan-Specific VISSIM Protocol for Submissions of VISSIM Modeling
    Hill, Matthew ;
    Pittenger, Jason
    2020-08-14 | PDF
    The guidance developed as part of this research project communicates and lays out the expectations for VISSIM model development and deliverables so that both the vendor and the Michigan Department of Transportation (MDOT) can move through modeling projects in congruence based on current best practices. This will provide consistency in vendor delive ...
  • Illinois Highway Materials Sustainability Efforts 2019
    Illinois Highway Materials Sustainability Efforts 2019
    Morse, Kelly L.
    2020-08-13 | PDF
    The Illinois Department of Transportation (IDOT) continues to use a variety of reclaimed and recycled materials in highway construction. Recycled materials are used in highway construction to supplement aggregates, concrete, hot-mix asphalt (HMA), steel, and sealants, as well as for soil modification and pavement markings. This report summarizes th ...
  • Development of Pavement Design and Investigation Strategies for NonInterstate Routes
    Development of Pavement Design and Investigation Strategies for Non-Interstate Routes
    Huynh, Nathan ;
    Mullen, Robert
    2020-08-11 | PDF
    This project investigated the state-of-the-practice on conducting field investigation for rehabilitation of non-interstate routes and whether field investigation is cost effective for the SCDOT. An online survey was conducted to determine the state-of-the-practice on pavement rehabilitation for non-interstate routes. A total of 29 responses were re ...
  • Probability of Detection of Electric Vehicles with Added Warning Sounds
    Probability of Detection of Electric Vehicles with Added Warning Sounds
    Roan, Michael J ;
    Neurauter, Luke
    2020-08-05 | PDF
    Detection performance as a function of distance was measured for 16 subjects who pressed a button upon aurally detecting the approach of an electric vehicle. The vehicle was equipped with loudspeakers that broadcast one of four additive warning sounds. Other test conditions included two vehicle approach speeds [10 and 20 km/h (kph)] and two backgro ...
  • Improving Connectivity Innovative FiberReinforced Polymer Structures for Wildlife Bicyclists andor Pedestrians A Report for Tasks 14
    Improving Connectivity: Innovative Fiber-Reinforced Polymer Structures for Wildlife, Bicyclists, and/or Pedestrians A Report for Tasks 1–4
    Bell, Mat ;
    Ament, Rob
    2020-08-04 | PDF
    Ecologists and engineers are constantly exploring new methods and adapting existing techniques to improve mitigation measures that increase motorist safety and wildlife species conservation. Crossing structures, combined with fences, are some of the most highly effective mitigation measures that are employed around the world due to their ability to ...
  • Development of Advanced WeighInMotion AWIM System for Effective Enforcement of Overweight Trucks to Reduce their Socioeconomic Impact on Major Highways
    Development of Advanced Weigh-In-Motion (A-WIM) System for Effective Enforcement of Overweight Trucks to Reduce their Socioeconomic Impact on Major Highways
    Nassif, Hani ;
    Ozbay, Kaan
    2020-08-01 | PDF
    The main objectives of this project are (1) to evaluate the infrastructure damages incurred by the overweight (OW) permit trucks, (2) to compare the permit policies between states to check understand how each state handles the OW permits, and (3) to develop the methodology to minimize the error in weighing the truck weight (gross vehicle weight and ...
  • Exploring Partnership Between Transit Agency and Shared Mobility Company An Incentive Program for AppBased Carpooling
    Exploring Partnership Between Transit Agency and Shared Mobility Company: An Incentive Program for App-Based Carpooling
    Shen, Qing ;
    Wang, Yiyuan
    2020-08-01 | PDF
    How should public transit agencies deliver mobility services in the era of shared mobility? Previous literature recommends that transit agencies actively build partnerships with mobility service companies from the private sector, yet public transit agencies are still in search of a solid empirical basis to help envision the consequences of doing so ...
  • Smart Multimodal Transportation Solutions for North Huntingdon Township in Response to Roadway Construction Projects on Route30
    Smart Multi-modal Transportation Solutions for North Huntingdon Township in Response to Roadway Construction Projects on Route-30
    Ma, Wei ;
    Qian, Sean
    2020-08-01 | PDF
    U.S. Route 30 (US30) in the North Huntingdon Township (NHT) serves as a main commercial corridor as well as a regional arterial. Part of a growing area, there are significant challenges in regards to congestion, safety, travel demand and mobility. There is a great need to provide a holistic mobility solution including driving, transit usage, park-a ...
  • SiteSpecific Seismic Ground Motion Analyses for NorthEast Arkansas
    Site-Specific Seismic Ground Motion Analyses for North-East Arkansas
    Hossain, Zahid ;
    Elsayed, Ashraf
    2020-08-01 | PDF
    The New Madrid Fault Zone (NMFZ) passes through the middle of northeast Arkansas (NEA), which is located in the western part of the upper Mississippi Embayment (ME) area. With the history of major earthquakes and the merge of ME and NMFZ in the region, the understanding of the nature of ground responses and prospects of liquefaction hazards in NEAR ...
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