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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 6221 - 6240 of 36049 results
  • A Targeted Approach to HighVolume Fly Ash Concrete Pavement Phase I Report
    A Targeted Approach to High-Volume Fly Ash Concrete Pavement (Phase I Report)
    Du, Sen ;
    Shi, Xianming
    2018-12-01 | PDF
    Unlike the conventional method of admixing nanomaterials directly in fresh concrete mixture, a more targeted approach was explored. Specifically, nanomaterials were used to improve the interface between coarse aggregate and cement paste, by coating the coarse aggregate with cement paste that contained graphene oxide or nanosilica. Using coated coar ...
  • Field Implementation of Rubberized Chip Seal
    Field Implementation of Rubberized Chip Seal
    Gheni, Ahmed ;
    Pourhassan, Alireza
    2018-12-01 | PDF
    Chip seals have been widely used as a pavement maintenance surface treatment due to its competitive cost and construction time. Recently, the research team developed a rubberized chip seal where natural aggregate is replaced with crumb rubber obtained from recycled tires. During this study, a total of 108 laboratory specimens and a field chip seal ...
  • Concrete Performance in Aggressive Salt and Deicing Environments
    Concrete Performance in Aggressive Salt and Deicing Environments
    Ibrahim, Ahmed ;
    Bayomy, Fouad
    2018-12-01 | PDF
    Roadside concrete parapets, barriers as well as bridge decks across the State of Idaho are exposed to deicing chemicals and salt brine used for ice and snow control in the winter. As such, signs of durability damage have manifested in some of such concrete infrastructure. The main objectives of this project were to evaluate current Idaho Transporta ...
  • Assessing the Impact of Smartphone Usage while Driving in Work Zones
    Assessing the Impact of Smartphone Usage while Driving in Work Zones
    Valdes Diaz, Didier M. ;
    Colucci Rios, Benjamin
    2018-12-01 | PDF
    The use of smartphones has been increasing over the last decade. The increase of smartphone usage by drivers is particularly concerning in highway work zones when operations and maintenance activities are being performed. This research aims to investigate the impact of using smartphone applications, such as a global positioning system (GPS), when d ...
  • Evaluation of Reserve Shear Capacity of Bridge Pier Caps Using the Deep Beam Theory
    Evaluation of Reserve Shear Capacity of Bridge Pier Caps Using the Deep Beam Theory
    Baniyam, Pappu ;
    Sharma, Anish
    2018-12-01 | PDF
    Many bridge pier caps are deep due to short shear spans. When analyzed using the slender beam theory (i.e., the sectional method), a large number of pier caps are found to be shear-overloaded even though they don't exhibit any noticeable cracking or signs of distress. AASHTO LRFD 2017 recommends the use of either a strut-and-tie or nonlinear finite ...
  • Reevaluation of LRFD Resistance Factors of Driven Piles
    Re-evaluation of LRFD Resistance Factors of Driven Piles
    Gunaratne, Manjriker ;
    Mullins, Gray
    2018-12-01 | PDF
    The objective of this project was to evaluate the predicted capacity based on the embedded data collector(EDC) and the pile driving analyzer (PDA) compared to the corresponding static load test capacity of driven piles for the purpose of establishing appropriate Load and Resistance Factor Design (LRFD) resistance factors for use with the EDC-FDOT m ...
  • Integrating CRASH Hospital and Roadway Data to Investigate the Effect of Cable Median Barriers on Injury Severity
    Integrating CRASH, Hospital, and Roadway Data to Investigate the Effect of Cable Median Barriers on Injury Severity
    Singleton, Michael ;
    Green, Eric R.
    2018-12-01 | PDF
    Kentucky annually integrates roadway and crash data so that roadway geometric information can be linked with crash details. This helps the state determine what engineering solutions might be warranted. Moreover, this roadway information can inform regression models that help predict crashes. Most of Kentucky’s roadway data are contained in the High ...
  • Performance Assessment of Asphalt Mixes Containing Reclaimed Asphalt Pavement and Tire Rubber
    Performance Assessment of Asphalt Mixes Containing Reclaimed Asphalt Pavement and Tire Rubber
    Hung, Shawn Shiangfeng
    2018-12-01 | PDF
    The pavement community, including both agencies and industries, is moving toward more sustainable pavement designs and pavement network management. Increasing amounts of recycled materials, both reclaimed asphalt pavement (RAP) and recycled tire rubber, are expected to be used in new pavement construction projects in the future to reduce the use of ...
  • Best Practices for Longitudinal Joint Construction and Compaction
    Best Practices for Longitudinal Joint Construction and Compaction
    Putman, Bradley J. ;
    Kim, Eric Mu-Young
    2018-12-01 | PDF
    Joints are the weakest area of an asphalt pavement and longitudinal joint cracking occurs for a number of reasons that lead to low density, low indirect tensile strength, and high permeability at the joint. The purpose of this study was to evaluate the different joint construction techniques used in South Carolina and perform comprehensive testing ...
  • Development and Demonstration of a CostEffective InVehicle Lane Departure and Advanced Curve Speed Warning System
    Development and Demonstration of a Cost-Effective In-Vehicle Lane Departure and Advanced Curve Speed Warning System
    Hayee, M. Imran ;
    Hussain, Shah
    2018-12-01 | PDF
    A Lane-Departure Warning System (LDWS) and Advance Curve-Warning System (ACWS) are critical among several Advanced Driver-Assistance Systems (ADAS) functions, having significant potential to reduce crashes. Generally, LDWS use different image processing or optical scanning techniques to detect a lane departure. Such LDWS have some limitations such ...
  • Motorcycle Licensing and Safety
    Motorcycle Licensing and Safety
    Bill, Andrea ;
    Noyce, David A.
    2018-12-01 | PDF
    All Wisconsin residents who plan to operate a Type 1 motorcycle on public roads must have a Class M (Motorcycle) license. In 2012, more than 513,000 Wisconsin residents held a valid Class M License. Data indicates there could be as many as 31,000 unlicensed motorcycle operators in the state without a Class M endorsement. Unlicensed operators accoun ...
  • Inspection and QAQC for ABC Projects
    Inspection and QA/QC for ABC Projects
    Citir, Nazik ;
    Laflamme, Simon
    2018-12-01 | PDF
    The effectiveness of cast-in-place joints and other connections are of critical importance for ABC projects. While high strength materials are being used for these in-field connections, there is a general lack of existing research regarding inspection of joint quality and performance prior to opening to traffic. While these joints are intended to b ...
  • Use of Prewetted Solid Materials for Roadway AntiIcing
    Use of Prewetted Solid Materials for Roadway Anti-Icing
    CTC & Associates LLC
    2018-12-01 | PDF
    Anti-icing (also known as “pre-treating”) is the winter road maintenance practice of applying a liquid or solid material intended to depress the freezing point of water in order to prevent winter storm precipitate from bonding to roadway pavement. Anti-icing may be performed hours (or even days) before a winter storm event begins; it can also be pe ...
  • INDOT Research Program Benefit Cost AnalysisReturn on Investment for Projects Completed in FY 2017
    INDOT Research Program Benefit Cost Analysis-Return on Investment for Projects Completed in FY 2017
    McCullouch, Bob
    2018-12-01 | PDF
    The Governor’s Office requested an annual financial analysis of the INDOT Research Program to determine the return on the research investment (ROI). The current financial analysis is for research projects that completed in FY 2017. Analyses on previous year’s projects is necessary primarily due to the time it takes some project outcomes to be imple ...
  • Rehabilitation Project Selection and Scheduling in Transportation Networks
    Rehabilitation Project Selection and Scheduling in Transportation Networks
    Song, Ziqi ;
    He, Yi
    2018-12-01 | PDF
    Highway project selection and scheduling are traditionally treated as two separate problems in the literature. It is critical to investigate how to select and schedule M&R projects in a way that can maximize their benefit or effectiveness while minimizing the traffic impacts of work zones across project development phases. There is a pressing need ...
  • Quick Response Optimizing Quality Assurance QA Processes for Asphalt Pavement Construction in the Northeast
    Quick Response: Optimizing Quality Assurance (QA) Processes for Asphalt Pavement Construction in the Northeast
    Daniel, Jo Sias ;
    Dave, Eshan V.
    2018-12-01 | PDF
    The use of quality assurance (QA) systems in highway infrastructure is critical to ensure durable, safe, and economical transportation operations. These processes ensure that the desired level of quality is maintained throughout the manufacturing and construction processes. For regions such as New England, a significant cost savings can be realized ...
  • Evaluation of Incident Response Improvements for Statewide Application Learning from the New Regional Traffic Management Center in Jacksonville Florida
    Evaluation of Incident Response Improvements for Statewide Application: Learning from the New Regional Traffic Management Center in Jacksonville, Florida
    Sando, T. ;
    Alluri, P.
    2018-12-01 | PDF
    Regional transportation management centers (RTMCs) are multimillion-dollar projects that serve as the hub of most freeway systems. A new RTMC in Jacksonville, FL, became operational in November 2015. This new facility replaces the old RTMC that was housed in the Florida Department of Transportation (FDOT) District 2 Urban Office building. The new f ...
  • Cybersecurity Research Considerations for Heavy Vehicles
    Cybersecurity Research Considerations for Heavy Vehicles
    Stachowski, Stephen ;
    Bielawski, Russ
    2018-12-01 | PDF
    The intent of this research is to investigate cybersecurity aspects of medium-duty/heavy-duty (MD/HD) trucks (classes 1 to 8) and compare those aspects to passenger vehicles. Information collected had a significant bias to-wards HD vehicles (class 7/8), as opposed to MD vehicles. This was due to the discovery process yielding very limited data on M ...
  • Overweight Permit Fee Structure Development
    Overweight Permit Fee Structure Development
    Vlahos, Nicholas J.
    2018-12-01 | PDF
    Federal and state laws limit the legal maximum gross vehicle weight of commercial vehicles operated on a highway network. The operator of a vehicle wishing to operate above these weights must obtain a permit prior to travel from the jurisdiction(s) to be entered. For travel on state and US highways, state statutes and regulations govern the allowab ...
  • After Study of The Bus Rapid Transit A Line Impacts
    After Study of The Bus Rapid Transit A Line Impacts
    Tomhave, Benjamin ;
    Zhang, Yufeng
    2018-12-01 | PDF
    In response to the limited awareness surrounding Bus Rapid Transit (BRT) and the A Line, this study provides answers to questions regarding the operation and public perception of the A Line in the Twin Cities region, Minnesota. Two traffic scenarios were studied, one for high-volume oversaturated traffic during the Minnesota State Fair, and a secon ...
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