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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 4401 - 4420 of 36908 results
  • HighMast Tower Foundation
    High-Mast Tower Foundation
    Sim, Chungwook  ;
    Song, Chung Rak
    2020-12-31 | PDF
    High-Mast Tower (HMT) foundations have been traditionally designed and constructed using cast-in-place foundation with anchor bolts that are used to secure the tower to the foundation. This type of design requires a base plate that is welded to the tower shaft. The Nebraska Department of Transportation (NDOT) has recently experienced issues with st ...
  • Preparing for Traffic Signal Operations in a MultiModal Connected and Autonomous Vehicle Environment
    Preparing for Traffic Signal Operations in a Multi-Modal Connected and Autonomous Vehicle Environment
    Hajbabaie, Ali ;
    Bin Al Islam, S M A
    2020-12-31 | PDF
    The objective of this research project is to help the Washington State Department of Transportation (WSDOT) identify the right time and location for selecting a corridor for connected vehicle (CV) implementation so that the technological needs and compatibilities are met and expected outcomes are significant. This research team surveyed twenty-one ...
  • Framework of Asphalt Balanced Mix Design BMD for New England Transportation Agencies
    Framework of Asphalt Balanced Mix Design (BMD) for New England Transportation Agencies
    University of Massachusetts Dartmouth. Department of Civil and Environmental Engineering
    2020-12-31 | PDF
    The objective of this study was to synthesize existing information and to develop recommendations for a rational Balanced Mix Design (BMD) approach for use by New England transportation agencies. A survey was developed and administered to ascertain information related to pavement distress for the NETC state agencies. The predominate distresses note ...
  • Research on Weather Conditions and Their Relationship to Crashes
    Research on Weather Conditions and Their Relationship to Crashes
    Anderson, Mark ;
    Khattak, Aemal J.
    2020-12-31 | PDF
    The objectives of the research were to conduct a seasonal investigation of when winter weather conditions are a factor in crashes reported in Nebraska, to perform statistical analyses on Nebraska crash and meteorological data and identify weather conditions causing the significant safety concerns, and to investigate whether knowing the snowfall amo ...
  • Investigation of Weather Conditions and Their Relationship to Crashes
    Investigation of Weather Conditions and Their Relationship to Crashes
    Anderson, Mark ;
    Khattak, Aemal J.
    2020-12-31 | PDF
    The objectives of the research were to conduct a seasonal investigation of when winter weather conditions are a factor in crashes reported in Nebraska, to perform statistical analyses on Nebraska crash and meteorological data and identify weather conditions causing the significant safety concerns, and to investigate whether knowing the snowfall amo ...
  • Life Cycle Cost and Performance of Lightweight Noise Barrier Materials along Bridge Structures
    Life Cycle Cost and Performance of Lightweight Noise Barrier Materials along Bridge Structures
    Odell, Wade ;
    Trevino, Manuel
    2020-12-31 | PDF
    The main objective of this study was to assess the feasibility and effectiveness of transparent lightweight noise barriers on IH-30 in Dallas, and to serve as a pilot project for TxDOT for future similar projects. An opportunity to implement similar research and extend the project arose with the noise study on SH 190. The research team undertook th ...
  • Efficiency Study of DesignBuild Program
    Efficiency Study of Design-Build Program
    Molenaar, Keith R. ;
    Torres-Machi, Cristina
    2020-12-31 | PDF
    This report summarizes a two-year study of the South Carolina Department of Transportation (SCDOT) Design-Build Program. The research examined design-build project selection, cost estimating procedures and overall project performance. The study benchmarked the SCDOT Design-Build Program against other state DOT programs through interviews, past proj ...
  • Reduction of pH Levels From Underdrain Outlets
    Reduction of pH Levels From Underdrain Outlets
    Bandara, Nishantha ;
    Jensen, Elin
    2020-12-31 | PDF
    Many government and private highway agencies have identified the benefits of using recycled aggregate in highway construction. The use of recycled aggregates in highway construction, not only decreases the demand for virgin aggregates, it offers a sustainable solution. However, previous research has identified some environmental concerns of using r ...
  • Pooled Versus Private RideHailing A Joint Revealed and Stated Preference Analysis Recognizing PsychoSocial Factors
    Pooled Versus Private Ride-Hailing: A Joint Revealed and Stated Preference Analysis Recognizing Psycho-Social Factors
    Kang, Shuqing ;
    Mondal, Aupal
    2020-12-31 | PDF
    Many government and private highway agencies have identified the benefits of using recycled aggregate in highway construction. The use of recycled aggregates in highway construction, not only decreases the demand for virgin aggregates, it offers a sustainable solution. However, previous research has identified some environmental concerns of using r ...
  • Latest Generation Data Portal for the Intelligent Mobility Meter
    Latest Generation Data Portal for the Intelligent Mobility Meter
    Pires, Bernardo R.
    ORCID ICON IMG
    2020-12-30 | PDF
    The Intelligent Mobility Meter (IMM) is a portable data acquisition and analysis platform for the collection of fine-grained statistics on pedestrian, cyclist and vehicular traffic. The IMM has grown out of three UTC-sponsored projects (“Automatic Counting of Pedestrians and Cyclists”, “Measuring Pedestrian Wait-Time at Intersections”, and “The Int ...
  • Comprehensive Cost of Rail Incidents in North Carolina
    Comprehensive Cost of Rail Incidents in North Carolina
    Bert, Steven ;
    Keller, Claire
    2020-12-28 | PDF
    This research provides a comprehensive appraisal and cost tool for the broad spectrum of events occurring on North Carolina’s rail network. It evaluates costs associated with property damage, casualty, and delay, rerouting, and supply chain events. It also analyzes upstream effects, emissions costs, railroad operating costs, and emergency responder ...
  • Driven Pile Load Test Data Analysis and Calibration of LRFD Resistance Factor for Mississippi Soils
    Driven Pile Load Test Data Analysis and Calibration of LRFD Resistance Factor for Mississippi Soils
    Steward, Eric ;
    Giron Gonzalez, Dianabel
    2020-12-22 | PDF
    The Mississippi Department of Transportation (MDOT) currently uses LRFD. However, the LRFD resistance factor used does not necessarily represent the Mississippi soils. A pair of authors have already calibrated LRFD resistance factors for other states using First Order Second Moment (FOSM). However, FOSM leads to over-conservatism. Thus, this study ...
  • CLEAR Technology Transfer and Metric Building
    CLEAR Technology Transfer and Metric Building
    Henard, David H
    2020-12-21 | PDF
    Managing knowledge is centered on deciding what is to be shared, by/with whom, and how to share it. Ultimately, organizational value is produced when the shared knowledge is used and reused. Consistent value is created when there is an atmosphere of mutual trust, when employees are motivated to share knowledge, and when there is a systematic proces ...
  • Steel Post Version of TrailingEnd Anchorage System Phase I
    Steel Post Version of Trailing-End Anchorage System – Phase I
    Yosef, Tewodros Y ;
    Lechtenberg, Karla A.
    2020-12-17 | PDF
    In 2013, a non-proprietary, trailing-end anchorage system with a modified Breakaway Cable Terminal (BCT) was developed by the Midwest Roadside Safety Facility (MwRSF) for the Midwest Guardrail System (MGS). Although this trailing-end, guardrail anchorage system adequately met the American Association of State Highway and Transportation Officials (A ...
  • Development of a PCB Steel Cover Plate for Large Open Joints Phase II
    Development of a PCB Steel Cover Plate for Large Open Joints – Phase II
    Bickhaus, Ryan F ;
    Bielenberg, Robert W.
    2020-12-17 | PDF
    Portable concrete barriers (PCBs) are commonly used to protect work-zone personnel and to shield motorists from hazards in construction areas. It is not uncommon to encounter longitudinal gaps within PCB installations due to the practice of constructing and connecting the barriers from different ends during setup or contractor operations. Longitudi ...
  • MASH Evaluation of the SteelPost TrailingEnd Anchorage System
    MASH Evaluation of the Steel-Post, Trailing-End Anchorage System
    Lechtenberg, Karla A. ;
    Pajouh, Mojdeh Asadollahi
    2020-12-17 | PDF
    A research study was conducted to develop and evaluate a steel-post, trailing-end, anchorage system for the Midwest Guardrail System (MGS) as an alternative to the existing wood-post, trailing-end anchorage system with BCT posts. Following the design and development of the steel-post, trailing-end anchorage system for the MGS, two full-scale crash ...
  • Performance Evaluation of Missouri DOT DualPost UChannel Sign Support According to MASH 2016
    Performance Evaluation of Missouri DOT Dual-Post, U-Channel Sign Support According to MASH 2016
    Lechtenberg, Karla A. ;
    Flores, Jaryd R
    2020-12-16 | PDF
    The objective of this research was to evaluate the dual-post, U-channel sign support system according to the Test Level 3 (TL-3) safety performance evaluation criteria of the American Association of State Highway and Transportation Officials’ (AASHTO) Manual for Assessing Safety Hardware (MASH). In test no. MOS-5, a 5,026-lb (2,280-kg) pickup truck ...
  • Crash Test Evaluation of a Prototype ZigZag Box Beam End Terminal MASH Test Designation No 331
    Crash Test Evaluation of a Prototype Zig-Zag Box Beam End Terminal: MASH Test Designation No. 3–31
    Lechtenberg, Karla A. ;
    Holloway, Jim C.
    2020-12-16 | PDF
    The New York State Department of Transportation (NYSDOT) desired to crash test an end terminal connected to box beam in a “zig zag” formation to evaluate its safety performance under the Manual for Assessing Safety Hardware (MASH 2016) criteria. Test no. NYT-1 was conducted on the “zig-zag” box beam end terminal according to MASH 2016 test designat ...
  • Data Analysis of Nebraska Pavements Containing RAP
    Data Analysis of Nebraska Pavements Containing RAP
    Azzam, Abdullah ;
    Kim, Yong-Rak
    2020-12-15 | PDF
    Nebraska has used reclaimed asphalt pavement (RAP) materials (in a range of 20-50%) over more than 10 years in pavement construction. Despite the immediate economic and environmental benefits it has been reported that incorporating RAP may reduce pavement durability and crack resistance. This study used NDOT’s database to investigate the effect of ...
  • Rebounding From Disruptive Events Optimization of PostDisaster Reconstruction Activities for Critical and Interdependent Infrastructure Networks
    Rebounding From Disruptive Events: Optimization of Post-Disaster Reconstruction Activities for Critical and Interdependent Infrastructure Networks
    Kermanshachi, Sharareh ;
    Bergstrand, Kelly
    2020-12-12 | PDF
    In the aftermath of disasters, when reliable transportation systems are vital, the chaotic and complex environment creates multiple uncertainties and risks in the reconstruction of transportation infrastructures. Damaged transport infrastructures decrease the timeliness of emergency responses and recovery procedures and make it difficult for author ...
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