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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 5041 - 5060 of 36908 results
  • TenYear Review of Monitoring System on I35W Saint Anthony Falls Bridge
    Ten-Year Review of Monitoring System on I-35W Saint Anthony Falls Bridge
    Brown, Riley J ;
    McCoy, Rebekka
    2020-06-01 | PDF
    The I-35W St. Anthony Falls bridge was highly instrumented with over 500 sensors to verify design assumptions, serve as a testbed to examine bridge sensing techniques, and evaluate the effectiveness of different bridge monitoring strategies. The instrumentation deployed on the bridge to investigate the structural behavior included vibrating wire st ...
  • Prototype System for Implementing the Ultrasonic Guided Wave Method on the Field
    Prototype System for Implementing the Ultrasonic Guided Wave Method on the Field
    Erdogmus, Ece ;
    Garcia, Eric
    2020-06-01 | PDF
    This report presents the latest improvements in a recently developed nondestructive testing (NDT) technique for early detection of various flaws such as corrosion, delamination, and concrete cracking in reinforced concrete (RC) bridge decks. The method, named Ultrasonic Guided Wave Leakage (UGWL) method by the developing authors, involves use of in ...
  • Understanding and Mitigating the Dynamic Behavior of RICWS and DMS Under Wind Loading
    Understanding and Mitigating the Dynamic Behavior of RICWS and DMS Under Wind Loading
    Linderman, L. ;
    Guala, M
    2020-06-01 | PDF
    Dynamic Messaging Signs (DMS) and Rural Intersection Conflict Warning Signs (RICWS) are roadside signs that feature much larger and heavier signs than are typically placed on their respective support systems. The excess weight and size of these signs, in conjunction with their breakaway support systems, introduces vibration problems not seen in the ...
  • Study of AntiStrip Additives on Granite Based FC5 Asphalt Mixtures
    Study of Anti-Strip Additives on Granite Based FC-5 Asphalt Mixtures
    Gu, Fan ;
    Moraes, Raquel
    2020-06-01 | PDF
    This project evaluated the influence of anti-strip additives on the durability and moisture susceptibility of granite-based open-graded friction course, referred to as FC-5 asphalt mixtures. The laboratory testing involved two granite-based FC-5 mixtures containing 1% hydrated lime (by weight of aggregate), 1% hydrated lime plus 0.5% liquid anti-st ...
  • Local Calibration of the Pavement ME for Missouri
    Local Calibration of the Pavement ME for Missouri
    Titus-Glover, Leslie ;
    Rao, Chetana
    2020-06-01 | PDF
    Missouri Department of Transportation (MoDOT) was one of the early adopters of the Mechanistic-Empirical Pavement Design Guide procedure and completed the local calibration using the research grade software in 2009. The emphasis in 2009 was on establishing testing and field data collection programs, and calibrating for new designs as adequate perfo ...
  • Integration of Ramp Metering and OffRamp Progression
    Integration of Ramp Metering and Off-Ramp Progression
    Chang, Gang-Len ;
    Cheng, Yao
    2020-06-01 | PDF
    The primary objective of this project was to develop an integrated freeway control system that can effectively guide the timely activation of key operation components either concurrently or sequentially in contending with daily recurrent congestion. This project produced four traffic models for highway agencies to overcome various constraints exist ...
  • Methods To Ensure Appropriate Installation and Prevent Loosening of Anchor Nuts on Ancillary Highway Structures
    Methods To Ensure Appropriate Installation and Prevent Loosening of Anchor Nuts on Ancillary Highway Structures
    Singh, Japsimran ;
    Hebdon, Matthew H
    2020-06-01 | PDF
    Loose anchor nuts on foundations of highway ancillary structures have been implicated in numerous structural failures in the Transportation industry for several decades. Loose anchor nuts can increase the stresses in the anchor rods, which can lead to potential collapse of the ancillary structure under wind loads. The exact cause of anchor nut loos ...
  • Public Transit and Womens Safety Real and Perceived Concerns A Look at the US and Florida
    Public Transit and Women’s Safety – Real and Perceived Concerns: A Look at the U.S. and Florida
    University of South Florida. National Center for Transit Research (U.S.)
    2020-06-01 | PDF
    This study examines issues of women’s safety and security on public transit. The first section of the report provides background information and synthesizes recent literature on the topic of women’s security not only when using (or working in) public transit, but while traveling in any public space. The second section of the report analyzes transit ...
  • Geotechnical Database Phase III pLog Enterprise Enterprise GISBased Geotechnical Data Management System Enhancements
    Geotechnical Database, Phase III - pLog Enterprise -Enterprise GIS-Based Geotechnical Data Management System Enhancements
    Deaton, Scott L.
    2020-06-01 | PDF
    The Louisiana Department of Transportation (DOTD) has been collecting geotechnical data in the District labs for many years in a variety of different formats, and in many cases, District personnel are inputting the same data repeatedly in different systems. Accessing this data and combining it with new data for the purpose of design, analysis, visu ...
  • Development of CostCompetitive Timber Bridge Designs for LongTerm Performance
    Development of Cost-Competitive Timber Bridge Designs for Long-Term Performance
    Brashaw, Brian ;
    Wacker, James
    2020-06-01 | PDF
    Modern timber bridges have shown that timber is a durable option for primary structural members in highway bridges and can perform satisfactorily for 50 years or longer when properly designed, fabricated and maintained. However, various cost assumptions have indicated that timber bridges are more expensive than concrete bridges. This project was un ...
    Supporting Files
  • Safe and Accessible Pedestrian Facilities Inventory Model SAPFIM Planning and Design
    Safe and Accessible Pedestrian Facilities Inventory Model (SAPFIM): Planning and Design
    Cevallos, Fabian
    2020-06-01 | PDF
    The main objective of this project is to plan and design a web-based software application that local agencies can use for the collection, storage, querying, analysis, and reporting of pedestrian facilities like sidewalks along public roads. Criteria for determining the accessibility of pedestrian facilities will be based on the literature review in ...
  • The Future of Public Spaces and Placemaking June 2020 Summary of Findings from the Knight Urbanism Next Portland Workshop
    The Future of Public Spaces and Placemaking: June 2020 Summary of Findings from the Knight + Urbanism Next Portland Workshop
    University of Oregon  ...
    2020-06-01 | PDF
    The Urbanism Next Center at the University of Oregon, in partnership with Alta Planning + Design, Spirit for Change, and Metro hosted the Future of Public Spaces and Placemaking workshop on January 24th, 2020. This one-day workshop, supported by the Knight Foundation, brought together a wide range of community activists, government officials, polic ...
  • Crash Modification Factor Recommendation List
    Crash Modification Factor Recommendation List
    Souleyrette, Reginald ;
    Tanzen, Riana
    2020-06-01 | PDF
    Practitioners use Crash Modification Factors/Functions (CMFs) to calculate the number of crashes expected once a countermeasure has been implemented. When evaluating design alternatives, CMFs can be used in conjunction with safety performance functions (SPFs) to derive crash predictions. The Federal Highway Administration (FHWA) maintains the CMF C ...
  • Identification of Tourist Flows in Florida to Support Development of Tourist Travel Module for FDOT Florida Transportation Model
    Identification of Tourist Flows in Florida to Support Development of Tourist Travel Module for FDOT Florida Transportation Model
    Kirilenko, Andrei ;
    Kim, Jin Won
    2020-06-01 | PDF
    Continued use of Florida Statewide Model (FLSWM) poses a number of important limitations in terms of tourist-oriented traffic flow, accidents, potential revenue and maintenance considerations. The overall goal of the project was to enable Florida Department of Transportation (FDOT) to better monitor and forecast traffic flow by separate considerati ...
  • Testing Procedures for Long Life Heavy Duty Stabilized Bases
    Testing Procedures for Long Life Heavy Duty Stabilized Bases
    Ashtiani, Reza S. ;
    Tarin, Jose
    2020-06-01 | PDF
    Fatigue cracking is one of the major types of distresses observed in pavement structures due to repeated traffic loads. The new mechanistic pavement design protocols, such as TxME, require modulus of rupture of the materials as input to the fatigue performance models. This report discusses the practical and theoretical issues associated with tradit ...
  • The Calibration of the AASHTO ASD and LRFD for Maryland Sign and High Mast Lighting Structure Design
    The Calibration of the AASHTO ASD and LRFD for Maryland Sign and High Mast Lighting Structure Design
    Fu, Chung C. ;
    Ye, Yunchao
    2020-06-01 | PDF
    The Maryland Department of Transportation State Highway Administration (MDOT SHA) is working to update the standard design for sign and mast arm lighting structures. The following tasks were performed as a part of this research to assist with the update process: (1) Complete design parameters of MD-specified sign; (2) Defining wind pressure applica ...
  • Synthesis on the Contributing Factors and Effective Countermeasures for LowVolume Roadway Fatality Rates in the Southeast
    Synthesis on the Contributing Factors and Effective Countermeasures for Low-Volume Roadway Fatality Rates in the Southeast
    Stamatiadis, Nikiforos ;
    Weast, Jennifer
    2020-06-01 | PDF
    In the Southeast US, the largest proportion of fatal crashes occur on low-volume roads (LVRs). Many state transportation agencies have recognized this problem and are implementing countermeasures to reduce fatality rates. This synthesis contributes to ongoing efforts to lower crash rates on LVRs by identifying and describing countermeasures for imp ...
    Supporting Files
  • FullDepth Reclamation of Asphaltic Concrete Pavements
    Full-Depth Reclamation of Asphaltic Concrete Pavements
    Beckham, Tony ;
    Rister, Brad
    2020-06-01 | PDF
    The Kentucky Transportation Cabinet (KYTC) has used a full-depth reclamation (FDR) process over the past few years to rehabilitate asphalt pavements exhibiting widespread base failures. FDR transforms existing hot-mix asphalt (HMA) pavement and underlying granular materials into a stabilized base layer. The stabilized layer is then overlaid with a ...
  • Assessing the Effectiveness of Potassium Acetate to Control Snow and Ice on Minnesota Highways
    Assessing the Effectiveness of Potassium Acetate to Control Snow and Ice on Minnesota Highways
    Waidley, Greg ;
    Hirt, Brian
    2020-06-01 | PDF
    As an alternative for snow and ice control, potassium acetate (KAc) has potential advantages compared with salt and brine—reduction of chlorides entering receiving waters, a lower effective deicing temperature, and reduction in corrosion impacts—but success in the field has been largely anecdotal. MnDOT District 1 worked with an investigator team t ...
  • Potential Effect of Cable Median Barriers on Commercial Vehicle Crossover Crashes
    Potential Effect of Cable Median Barriers on Commercial Vehicle Crossover Crashes
    Stamatiadis, Nikiforos ;
    Sagar, Shraddha
    2020-06-01 | PDF
    In 2016, commercial motor vehicles (CMVs) were involved in 4,079 fatal crashes in the U.S., representing 11.8 percent of all fatal crashes. State of Kentucky crash data for 2015-2016 show that per capita crash rates and increases in crash-related fatalities exceeded the national average. Crossover crashes occur when a vehicle leaves its intended pa ...
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