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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 7981 - 8000 of 36151 results
  • AgentBased Simulation for Investigating the Safety Concerns of Electric Vehicles in the US
    Agent-Based Simulation for Investigating the Safety Concerns of Electric Vehicles in the US
    Tatari, Omer ;
    Karaaslan, Enes
    2017-06-01 | PDF
    When operated at low speeds, electric and hybrid vehicles have created pedestrian safety concerns in congested areas of various city centers because they have relatively silent engines compared to those of internal combustion engine vehicles (ICEVs), and there is no engine noise to warn pedestrians and cyclists of an oncoming electric or hybrid veh ...
  • Work zone intrusion alert technologies assessment and practical guidance final report
    Work zone intrusion alert technologies : assessment and practical guidance : final report.
    Gambatese, John A. ;
    Lee, Hyun Woo
    2017-06-01 | PDF
    A work zone intrusion alert technology is a type of safety system that is used in a roadway work zone to alertfield workers and secure time for them to escape when errant vehicles intrude into the work zone. Althoughsuch technologies have potential to significantly improve the overall safety of construction work zones,previous studies reported mixe ...
  • Signal Timing Optimization With Consideration of Environment and Safety Impacts Part B
    Signal Timing Optimization With Consideration of Environment and Safety Impacts, Part B
    Andrade, Gustavo R. de ;
    Elefteriadou, Lily
    2017-06-01 | PDF
    The main performance measures used in the assessment and optimization of traffic signal timing have traditionally been restricted to mobility, with limited consideration of environmental and safety aspects. The goal of this study is to develop a signal timing optimization algorithm that can consider mobility, safety, and environmental measures simu ...
  • A Datadriven Framework for Damage Diagnosis of Coastal Bridges
    A Data-driven Framework for Damage Diagnosis of Coastal Bridges
    Sun, Chao ;
    Zhang, Zhiming
    2017-06-01 | PDF
    Coastal bridges are exposed to multiple hazardous conditions including the corrosive environment, strong winds, storm surges and waves, abutment scour, possible vessel collisions and so forth. All these factors deteriorate the bridges, reduce their load-carrying capacities and even cause the bridges to collapse. A well-known catastrophic example is ...
  • Sidewalk Survey Implementation for the Southeast Region
    Sidewalk Survey Implementation for the Southeast Region
    Guensler, Randall ;
    Boyer, David
    2017-06-01 | PDF
    With funding from GDOT and STRIDE, the team deployed the Online Sidewalk Assessment Survey to gather input on local sidewalk repair and maintenance preferences across a variety of community types in the southeast. The team targeted four major cities in the Southeast United States, as well as four Georgia communities, and analyzed the results to ass ...
  • Pilot Study Examining the Effects of Aircraft Noise on Sleep in Communities Near Philadelphia International Airport
    Pilot Study Examining the Effects of Aircraft Noise on Sleep in Communities Near Philadelphia International Airport
    Basner, Mathias ;
    Witte, Maryam
    2017-06-01 | PDF
    Aircraft noise can disturb sleep and impair recuperation. Representative field studies are needed for health impact assessments and to inform noise policy. To evaluate feasibility of a new unobtrusive methodology that objectively monitors sleep and identifies awakenings based on heart rate and actigraphy, an unattended pilot field study was conduct ...
  • Towards a Holistic Understanding of Quality of Life An Analysis of ActivityTravel Patterns on NonMidweekdays
    Towards a Holistic Understanding of Quality of Life: An Analysis of Activity-Travel Patterns on Non-Mid-weekdays
    Jin, Xia ;
    Asgari, Hamidreza
    2017-06-01 | PDF
    The practice of travel-demand forecasting has placed substantial emphasis on forecasting travel during a “typical mid-week” (Tuesday – Thursday) day. While this is adequate from the stand point of understanding congestion due to commute, such an approach does not paint a complete picture of the overall travel patterns of people. The intent of this ...
  • Cabin Crew Fire Training Needs Analysis
    Cabin Crew Fire Training Needs Analysis
    McLean, C. L. ;
    Weed, David B.
    2017-06-01 | PDF
    The degree to which cabin crew are prepared for firefighting events is a variable in transport aviation, as airlines have different firefighting training programs for their crews. The expertise provided by these programs has not been previously studied for U.S. airline cabin crew. A training needs assessment has been developed by RGW Cherry and Ass ...
  • Validation of hotpoured crack sealant performancebased guidelines
    Validation of hot-poured crack sealant performance-based guidelines.
    Al-Qadi, Imad L. ;
    Ozer, Hasan
    2017-06-01 | PDF
    This report summarizes a comprehensive research effort to validate thresholds for performance-based guidelines andgrading system for hot-poured asphalt crack sealants. A series of performance tests were established in earlier research andinclude the crack sealant bending beam rheometer (CSBBR), crack sealant direct tension test (CSDTT), the crack s ...
  • Development of EarthquakeResistant Precast Pier Systems for Accelerated Bridge Construction in Nevada
    Development of Earthquake-Resistant Precast Pier Systems for Accelerated Bridge Construction in Nevada
    Mehrsoroush, Ali ;
    Saiidi, Mehdi Saiid
    2017-06-01 | PDF
    The Nevada Department of Transportation (NDOT) has used to a limited extent prefabricated bridge elements for accelerated construction of single-span bridges. For NDOT to expand its accelerated bridge construction (ABC) program, reliable and practical earthquake-resistant elements and connections need to be developed for bridges with two or more sp ...
  • FEANN Based Modeling of 3D Simple Reinforced Concrete Girders for Objective Structural Health Evaluation
    FE-ANN Based Modeling of 3D Simple Reinforced Concrete Girders for Objective Structural Health Evaluation
    Fletcher, Eric ;
    Abouelleil, Alaaeldin
    2017-06-01 | PDF
    The structural deterioration of aging infrastructure systems and the costs of repairing these systems is an increasingly important issue worldwide. Structural health monitoring (SHM), most commonly visual inspection and condition rating, has proven to be a cost-effective method for detecting and evaluating damage. However, the effectiveness varies ...
  • What Do Americans Think About Federal Tax Options to Support Public Transit Highways and Local Streets and Roads Results From Year Eight of a National Survey Final Report
    What Do Americans Think About Federal Tax Options to Support Public Transit, Highways, and Local Streets and Roads? Results From Year Eight of a National Survey: Final Report
    Nixon, Hilary ;
    Agrawal, Asha Weinstein
    2017-06-01 | What Do Americans Think About Federal Tax Options to Support Transportation? | PDF
    This report summarizes the results of the eighth year of a national random-digit-dial public opinion poll asking 1,201 respondents if they would support various tax options for raising federal transportation revenues, with a special focus on understanding support for increasing revenues for public transit. Ten specific tax options tested were varia ...
  • Improved bridge joint materials and design details
    Improved bridge joint materials and design details.
    Hopwood II, Theodore ;
    Van Dyke, Christopher
    2017-06-01 | PDF
    Expansion joints accommodate bridge movements that result from factors such as thermal expansion and contraction, concrete shrinkage, creep effects, live loading, settlement of the foundation and substructure, and environmental stressors. Expansion joints fall into two categories — open joints and closed joints. Open joints contain gaps that facili ...
  • Invehicle work zone messages final report
    In-vehicle work zone messages : final report.
    Craig, Curtis M. ;
    Achtemeier, Jacob
    2017-06-01 | PDF
    Work zones present an increased risk to drivers and the work crew. To mitigate these risks, this study investigated thepotential effects of in-vehicle messages to communicate work zone events to the driver. The researchers conductedliterature reviews on risks imposed by work zones, along with design guidelines for any in-vehicle messaging system. T ...
  • Personal transportation plan pilot program phase 1 exploring the transportation behaviors and needs of veterans and people with physical disabilities and mobility constraints
    Personal transportation plan pilot program phase 1 : exploring the transportation behaviors and needs of veterans and people with physical disabilities and mobility constraints.
    University of Vermont. Transportation Research Center
    2017-06-01 | PDF
    This report summarizes the initial phase of the Personal Transportation Plan Pilot Program (PTP3). The purpose of the PTP3 initiative is to develop a personal transportation planning tool that can be used by disabled Vermonters and Vermont veterans to match existing transportation resources with their travel needs. In order to accomplish this goal, ...
  • Effect on asphalt quality due to nighttime construction final report
    Effect on asphalt quality due to nighttime construction : final report.
    Amirkhanian, Serji N. ;
    Corley, Mary
    2017-06-01 | PDF
    The objectives of this project were to identify and analyze the nighttime paving traffic control standards in other states and compare the effects of daytime vs. nighttime paving on quality, safety, costs, and construction time. Surveys of various Department of Transportations (DOTs) and local contractors were conducted. The safety issues involved ...
  • Evaluation of IFIT results and machine variability using MnRoad test track mixtures
    Evaluation of I-FIT results and machine variability using MnRoad test track mixtures.
    Ozer, Hasan ;
    Al-Qadi, Imad L.
    2017-06-01 | PDF
    The Illinois Flexibility Index Test (I-FIT) was developed to distinguish between different mixtures in terms of potential cracking. Severalmachines were manufactured and are currently available to perform the I-FIT. This report presents the results and findings from anexperimental program developed to compare various I-FIT configurations. Three dif ...
  • Breaking Barriers to Bike Share Insights from Residents of Traditionally Underserved Neighborhoods
    Breaking Barriers to Bike Share: Insights from Residents of Traditionally Underserved Neighborhoods
    McNeil, Nathan ;
    Dill, Jennifer
    2017-06-01 | PDF
    Evidence has shown that higher income and white populations are overrepresented in both access to and use of bike share. Efforts to overcome underserved communities’ barriers to access and use of bike share have been initiated in a number of cities, including those working with the Better Bike Share Partnership (BBSP) to launch and test potentially ...
  • Optimized mobile retroreflectivity unit data processing algorithms project summary
    Optimized mobile retroreflectivity unit data processing algorithms : [project summary].
    Fletcher, James H.
    2017-06-01 | PDF
    Researchers examined both hardware andsoftware components of the MRU to determinewhere improvements could be made. The MRU’s laser makes one-meter sweeps, whichdetect retroreflective striping and measure its reflectivity. The MRU also detects otherreflective markings such as raised pavement markers, stop bars, etc. Using characteristics ofthe refle ...
  • Every Day Counts An Innovation Partnership With States EDC4 Progress Report 1 JanuaryJune 2017
    Every Day Counts: An Innovation Partnership With States - EDC-4 Progress Report #1, January–June 2017
    United States. Federal Highway Administration
    2017-06-01 | PDF
    Every Day Counts (EDC) is a Federal Highway Administration program to advance a culture of innovation in the transportation community in partnership with public and private stakeholders. Through this State-based effort, FHWA coordinates rapid deployment of proven strategies and technologies to shorten the project delivery process, enhance roadway s ...
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