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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 1221 - 1240 of 35867 results
  • Investigation of High Mast Illumination Pole Handhole Cracking
    Investigation of High Mast Illumination Pole Handhole Cracking
    Yount, Tristan ;
    Yu, Danqing
    2024-03-01 | PDF
    High mast illumination poles (HMIPs) experience cyclic loading from wind, which can cause large deflections at the top of the pole, amplified by the mass and geometry of the luminaire. As a result, large stresses can develop at the handhole and base plate connections. These details are especially susceptible to fatigue cracking due to the combinati ...
  • Investigation of High Mast Illumination Pole Handhole Cracking Technical Summary
    Investigation of High Mast Illumination Pole Handhole Cracking [Technical Summary]
    Yount, Tristan ;
    Yu, Danqing
    2024-03-01 | PDF
    This report describes an investigation in which four poles removed from service were studied to determine potential origins and driving factors of the handhole cracking. Each pole was cut and processed so that the crack surfaces could be examined. Sub-sized Charpy V-Notch (CVN) specimens were sampled from each pole and tested to estimate the toughn ...
  • NJDOT Commercial Vehicle Size and Weight Guidebook Update
    NJDOT Commercial Vehicle Size and Weight Guidebook Update
    Lamm, Christopher ;
    Higgins, Christian
    2024-03-01 | PDF
    The New Jersey Department of Transportation (NJDOT) engaged Cambridge Systematics (CS) to perform research on recent changes to the Federal and State regulations that govern commercial vehicle size and weight limits in New Jersey, assessing “best practice” communication techniques to share information with industry, and developing updates to NJDOT’ ...
  • NJDOT Commercial Vehicle Size and Weight Guidebook Update Technical Brief
    NJDOT Commercial Vehicle Size and Weight Guidebook Update [Technical Brief]
    Lamm, Christopher ;
    Potapa, Stefanie
    2024-03-01 | PDF
    The New Jersey Department of Transportation (NJDOT) engaged Cambridge Systematics (CS) to perform research on recent changes to the Federal and State regulations that govern commercial vehicle size and weight limits in New Jersey, assessing “best practice” communication techniques to share information with industry, and developing updates to NJDOT’ ...
  • Prediction of Road Condition and Smoothness for Flexible and Rigid Pavements in Louisiana Using Neural Networks
    Prediction of Road Condition and Smoothness for Flexible and Rigid Pavements in Louisiana Using Neural Networks
    Wu, Zhong ;
    Liu, Yilong
    2024-03-01 | PDF
    The Louisiana Department of Transportation and Development (DOTD) currently utilizes pavement performance prediction models in treatment selection and budget planning. These models are solely based on the non-linear curve-fitting regression of existing pavement condition data available in its pavement management system (PMS) database. The objective ...
  • Prediction of Road Condition and Smoothness for Flexible and Rigid Pavements in Louisiana Using Neural Networks Technical Summary
    Prediction of Road Condition and Smoothness for Flexible and Rigid Pavements in Louisiana Using Neural Networks [Technical Summary]
    Wu, Zhong ;
    Zhang, Zhongjie “Doc”
    2024-03-01 | PDF
    The objective of this research was to develop both short- and long- term pavement performance and deterioration models that can be used to estimate future pavement conditions and smoothness using ANN modeling. Specifically, the short-term models were for the prediction of 2- and 4-year future pavement surface cracking percentages for the current Lo ...
  • Evaluation of Performance and Life Cycle Cost of Asphalt 818 Specifications
    Evaluation of Performance and Life Cycle Cost of Asphalt (8/18 Specifications)
    Mayeux, Corey R ;
    Akentuna, Moses
    2024-03-01 | PDF
    The Louisiana Department of Transportation and Development (DOTD) revised its asphalt pavement specifications based upon research conducted at the Louisiana Transportation Research Center (LTRC). These changes introduced performance-based specifications in the form of the semi-circular bending (SCB) and the loaded wheel tracking (LWT) tests. Additi ...
  • Evaluation of Performance and Life Cycle Cost of Asphalt 818 Specifications Technical Summary
    Evaluation of Performance and Life Cycle Cost of Asphalt (8/18 Specifications) [Technical Summary]
    Mayeux, Corey R ;
    Cooper, Samuel B.
    2024-03-01 | PDF
    The objective of this research was to analyze and compare the performance of asphalt pavements constructed using specifications from the 2006 SSRB to pavements built under the 2016 SSRB and its accompanying special provision 8/18.
  • Wildlife Vehicle Collisions Data Gathering and Best Management Practices
    Wildlife Vehicle Collisions Data Gathering and Best Management Practices
    Villamagna, Amy M ;
    Laflamme, Eric
    2024-03-01 | PDF
    Currently the scope or cost of wildlife vehicle collisions (WVCs) in New Hampshire is not understood. Citizens die every year in New Hampshire in collisions with wildlife. There is also a cost in terms of emergency response and property damage from the collisions. Records of collisions with wildlife are not held in one easy to access central locati ...
  • Traffic Records Data Quality Management Guide Update to the Model Performance Measures for State Traffic Records Systems
    Traffic Records Data Quality Management Guide: Update to the Model Performance Measures for State Traffic Records Systems
    Osbourn, C ;
    Ruiz, C
    2024-03-01 | PDF
    The Traffic Records Data Quality Management Guide builds upon the information in the NHTSA 2011 report, Model Performance Measures for State Traffic Records Systems, by describing data quality performance measurement in the context of a data quality management program. The performance measurement process enables stakeholders to quickly identify pot ...
  • Traffic Management Geocast Study With Connected Vehicles on Indiana Highways
    Traffic Management Geocast Study With Connected Vehicles on Indiana Highways
    He, Zhitong ;
    Mathew, Abin
    2024-03-01 | PDF
    Vehicular communication allows vehicles to interact with road users, roadside infrastructure, and cloud-connected devices. It holds a crucial position in modern transportation systems, impacting both fundamental and advanced aspects and enhancing traffic safety and efficiency. C-V2X is a wireless communication technology that uses cellular networks ...
  • Newark Light Rail OriginDestination and Intermodal Choice Study Final Report
    Newark Light Rail Origin-Destination and Intermodal Choice Study [Final Report]
    Noland, Robert B ;
    Younes, Hannah
    2024-03-01 | PDF
    In this research we examined whether a multi-modal park and ride lot at the Newark Light Rail (NLR) Orange St. station would attract users, given its proximity to a major off-ramp (exit 13) from I-280 for travelers accessing downtown Newark. We collected customer data from NLR customers using an onboard survey and obtained 920 usable responses. Thi ...
  • Newark Light Rail OriginDestination and Intermodal Choice Study Technical Brief
    Newark Light Rail Origin-Destination and Intermodal Choice Study [Technical Brief]
    Noland, Robert B ;
    Venkiteela, Giri
    2024-03-01 | PDF
    The objective of this project is to understand the trip patterns and socio-economics of customers who use the NLR. In addition, we seek to understand the characteristics of those exiting from I-280 (at Exit 13), near the Orange St. station and determine whether Orange St. could serve as an intermodal transfer site. Secondly, we provide an analysis ...
  • Consultant Support for Intelligent Compaction and PaverMounted Thermal Profiling Projects in 20222023 Research Summary
    Consultant Support for Intelligent Compaction and Paver-Mounted Thermal Profiling Projects in 2022-2023 [Research Summary]
    The Transtec Group, Inc.
    2024-03-01 | PDF
    Due to the success of the MoDOT 2017-2021 Intelligent Compaction and Paver-Mounted Thermal Profiling (IC-PMTP) projects that demonstrate the paving quality improvements on numerous field projects, MoDOT has established a plan that includes additional IC-PMTP projects in 2022 and 2023. To ensure the continued success of the MoDOT IC-PMTP projects in ...
  • Administrative Rules and Structures of Speed Safety Camera SSC Systems Transportation Research Synthesis
    Administrative Rules and Structures of Speed Safety Camera (SSC) Systems- Transportation Research Synthesis
    Moore-Ritchie, Chelsea ;
    Kienitz, Heather
    2024-03-01 | PDF
    Minnesota does not currently have legislation enabling the use of speed safety cameras (SSCs), previously referred to as automated speed enforcement (ASE). However, due to an increase in speed-related fatal crashes on Minnesota roadways and research indicating the effectiveness of SSCs (TRS 2204), there is renewed interest in passing enabling legis ...
  • Electric Vehicle Fee Restructuring Transportation Research Synthesis
    Electric Vehicle Fee Restructuring - Transportation Research Synthesis
    Beattie, Alice ;
    Fordham, Damon
    2024-03-01 | PDF
    This Transportation Research Synthesis (TRS) investigates potential strategies for equitable fee structuring among motorists in Minnesota as adoption of electric vehicles (EVs) continues to accelerate. To examine funding structures that could address revenue shortfalls due to EV deployment, this TRS summarizes other states’ approaches to capturing ...
  • Electric Vehicle Fee Restructuring Transportation Research Synthesis
    Electric Vehicle Fee Restructuring [Transportation Research Synthesis]
    Beattie, Alice ;
    Fordham, Damon
    2024-03-01 | PDF
    This Transportation Research Synthesis (TRS) investigates potential strategies for equitable fee structuring among motorists in Minnesota as adoption of electric vehicles (EVs) continues to accelerate. To examine funding structures that could address revenue shortfalls due to EV deployment, this TRS summarizes other states’ approaches to capturing ...
  • BismarckMandan MPO Signalized Intersections Traffic Data Collection Pilot Project
    Bismarck-Mandan MPO Signalized Intersections Traffic Data Collection Pilot Project
    Sharma, Kshitij
    2024-03-01 | PDF
    Reliable intersection-traffic data are essential for transportation planning, operations, and safety. The City of Bismarck relies on targeted short counts, which is the predominant, albeit outdated, type of intersection traffic data collection. The city recently updated its signalized intersection equipment, hardware, and communications, making it ...
  • Development of Mix Designs and Matrix of Materials for MnROAD Low Carbon Concrete Test Site
    Development of Mix Designs and Matrix of Materials for MnROAD Low Carbon Concrete Test Site
    Weitzel, Nick ;
    Lopez, Sarah
    2024-03-01 | PDF
    To address climate change mitigation goals, alternative concrete paving mixtures are being investigated that are claimed to have a lower global warming potential (GWP) at time of construction with equal or better long-term performance compared to conventional concrete paving mixtures currently in use by the Minnesota Department of Transportation (M ...
  • Developing AIAssisted InSitu NDT Method for AirVoid Distribution Testing in Fresh and Hardened Concrete
    Developing AI-Assisted In-Situ NDT Method for Air-Void Distribution Testing in Fresh and Hardened Concrete
    Kong, Zhihao ;
    Mitra, Aritro Roy
    2024-03-01 | PDF
    Understanding the air void content in concrete is crucial since it significantly influences the durability and strength of the material, especially in environments susceptible to freeze-thaw cycles. This report introduces an advanced nondestructive testing (NDT) method for the in-situ detection of air voids in concrete by employing diffusive ultras ...
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