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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 3981 - 4000 of 36011 results
  • 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 ...
  • Mash 2016 Test Level 3 Evaluation of MnDOT Bicycle and Pedestrian Rail
    Mash 2016 Test Level 3 Evaluation of MnDOT Bicycle and Pedestrian Rail
    Faller, Ronald K. ;
    Rosenbaugh, Scott K.
    2020-12-11 | PDF
    The Minnesota Department of Transportation (MnDOT) desires to use a vehicle, bicycle, and pedestrian combination bridge railing system along pedestrian and bicycle bridge paths. A variation of the MnDOT combination bicycle and pedestrian railing was full-scale crash tested according to the Test Level 3 (TL-3) procedures described in the Manual for ...
  • Measures of Freight Network Resiliency During the Covid-19 Pandemic [supporting datasets]
    Hernandez, Sarah V ;
    Balthrop, Andrew
    2020-12-10 | ZIP
    Recent headlines depict significant shifts in operations within the freight community in particular, e.g., HOS laws suspended at a national level for the first time in 82 years; national carriers shifting operations completely to grocery supply chains; fleet operators laying off employees in response to manufacturing closures. As a result of the cu ...
    Dataset Supporting Files
  • Application of Augmented Reality and Tangible Interfaces To Minimize Work Zone Effects on Mobility Through Participatory Planning
    Application of Augmented Reality and Tangible Interfaces To Minimize Work Zone Effects on Mobility Through Participatory Planning
    Louis, Joseph ;
    Sunderman, Adam
    2020-12-06 | PDF
    Highway work zones account for about 10 percent of congestion but are an absolute necessity in ensuring that our transportation infrastructure can meet the mobility demands of growing populations. Unlike other causes of congestion, such as crashes, weather events, and rush-hour traffic, work zones are a result of planned actions by stakeholders. Fu ...
  • Optimized Development of Urban Transportation Networks 20
    Optimized Development of Urban Transportation Networks 2.0
    Schonfeld, Paul
    ORCID ICON IMG
    2020-12-03 | PDF
    This report presents as series of eight papers on methods for planning, designing, and scheduling the implementation of improvements in urban transportation systems. Five of the papers (1 – 4 and 6) focus on methods for evaluating, sequencing and scheduling interrelated improvements in transportation networks while the others present methods for de ...
  • Design and Development of an Automated Truck Mounted Attenuator [supporting dataset]
    White, Elizabeth ;
    Mollenhauer, Michael A
    2020-12-02 | ZIP
    Can an ATMA system and control concept be developed and demonstrated that makes it practical to remove the driver from the at-risk TMA vehicle in mobile and short duration work zone operations using a short following distance leader-follower control concept? Can an ATMA system be developed that allows a lead vehicle driver to perform their normal T ...
    Dataset Supporting Files
  • Incorporating Tourism Data in Traffic Estimation on Wyoming LowVolume Roads
    Incorporating Tourism Data in Traffic Estimation on Wyoming Low-Volume Roads
    Yue, Er ;
    Ksaibati, Khaled
    2020-12-01 | PDF
    This report explains the various data inputs and outputs associated with the travel demand model (TDM) developed for estimating traffic volumes on low-volume roads in Wyoming. This study incorporated tourism-related data into the TDM and developed methods to estimate traffic volume on low-volume roads in Wyoming. The new tourism-based model shared ...
  • Bridge Decks Mitigation of Cracking and Increased DurabilityPhase III
    Bridge Decks: Mitigation of Cracking and Increased Durability—Phase III
    Rahman, Mohammad ;
    Ibrahim, Ahmed
    2020-12-01 | PDF
    Early-age cracking in concrete decks significantly reduces the service life of bridges. This report discusses the application of various concrete mixtures that include potential early mitigation ingredients. Large-scale (7 ft × 10 ft) experimental bridge prototypes with similar restraint conditions found in actual bridges were poured with different ...
  • Development of a Statistical Model to Predict Materials Unit Prices for Future Maintenance and Rehabilitation in Highway Life Cycle Cost Analysis
    Development of a Statistical Model to Predict Materials' Unit Prices for Future Maintenance and Rehabilitation in Highway Life Cycle Cost Analysis
    Kim, Changmo ;
    Khan, Ghazan
    2020-12-01 | PDF
    The main objectives of this study are to investigate the trends in primary pavement materials’ unit price over time and to develop statistical models and guidelines for using predictive unit prices of pavement materials instead of uniform unit prices in life cycle cost analysis (LCCA) for future maintenance and rehabilitation (M&R) projects. Variou ...
  • Opioids at the Health and Transportation Safety Nexus
    Opioids at the Health and Transportation Safety Nexus
    Naumann, Rebecca B ;
    Shiue, Kristin
    2020-12-01 | PDF
    Background: Drug overdoses and motor vehicle (MV) crashes are leading causes of unintentional injury death in the US, resulting in over 100,000 fatalities in 2017. Research has established that opioids affect driving ability and that crash-related injuries often result in opioid prescribing. Despite known associations, current approaches for studyi ...
  • Revisiting the Impact of Teleworking on ActivityTravel Behavior Using Recent Data and SequenceBased Analytical Techniques
    Revisiting the Impact of Teleworking on Activity-Travel Behavior Using Recent Data and Sequence-Based Analytical Techniques
    Goulias, Konstadinos G. ;
    Su, Rongxiang
    2020-12-01 | PDF
    In this project motif and sequence analysis are used in tandem to analyze differences and commonalities between telecommuters and usual commuters. Telecommuters are by far more diverse in their allocation of time to places, activities, and travel. Approximately 20% of telecommuters stay at home all day during a workday, while only 8% of commuters d ...
  • Predicting SeismicInduced Rockfall Hazard for Targeted Site Mitigation
    Predicting Seismic-Induced Rockfall Hazard for Targeted Site Mitigation
    Olsen, Michael ;
    Massey, Chris
    2020-12-01 | PDF
    This research develops methods to predict seismic rockfall hazard areas by integrating two recent complementary research products (1) a lidar database of terrestrial surveys of rock slopes that span multiple earthquake events in Canterbury, NZ, and (2) a streamlined lidar-based rockfall hazard assessment method called RAI. Models were developed fro ...
  • Rapid Bridge Deck Joint Repair Investigation Phase III Tech Transfer Summary
    Rapid Bridge Deck Joint Repair Investigation – Phase III [Tech Transfer Summary]
    Jahren, Charles
    ORCID ICON IMG
    2020-12-01 | PDF
    The deck over backwall concept is a promising alternative to expansion joints that can both minimize the concrete removal needed for rehabilitation and prevent corrosives from penetrating the bridge’s substructure.
  • A Framework to Evaluate Causes and Effects of Truck Driver AtFault Crashes
    A Framework to Evaluate Causes and Effects of Truck Driver At-Fault Crashes
    Hernandez, Salvador ;
    Anderson, Jason C.
    2020-12-01 | PDF
    This study presents the analysis of truck driver-at-fault crashes, providing a framework to assess such crashes moving forward. This was accomplished through a series of analyses. First, an agency survey was administered to local, state, federal, and law enforcement agencies throughout the U.S. to gather opinions on truck driver-at-fault crashes an ...
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