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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 1961 - 1980 of 35865 results
  • StateofthePractice Review of FieldCuring Methods for Evaluating the Strength of Concrete Test Specimens
    State-of-the-Practice Review of Field-Curing Methods for Evaluating the Strength of Concrete Test Specimens
    Solanki, Pranshoo ;
    Xie, Haiyan (Sally)
    2023-04-01 | PDF
    The American Association of State Highway and Transportation Officials (AASHTO) T 23 standard provides instructions for making and curing concrete test specimens in the field. However, further research is needed to compare the strength of the field-cured specimen with the strength of the actual in-place concrete item. The purpose of this research i ...
  • Transverse Rumble Strips at Rural Intersections
    Transverse Rumble Strips at Rural Intersections
    Hallmark, Shauna ;
    Oneyear, Nicole
    2023-04-01 | PDF
    As a low-cost countermeasure to rural intersection crashes, transverse rumble strips (TRS) provide an audible and tactile warning to drivers approaching an intersection with the primary goal of decreasing crashes that result from running a stop sign. The objective of this project is to evaluate the effectiveness of different TRS patterns on stoppin ...
  • Understanding PostCOVID Safety Concerns toward the Use of Transit and Shared Mobility in Greater Minnesota
    Understanding Post-COVID Safety Concerns toward the Use of Transit and Shared Mobility in Greater Minnesota
    Fan, Yingling ;
    Qian, Xinyi
    2023-04-01 | PDF
    This study investigates the perceived safety risks and barriers that might prevent transit and shared mobility services from attracting post-COVID riders in Greater Minnesota. It includes an online survey of Greater Minnesota residents to understand their COVID-related safety concerns and their preferences and perceptions toward existing and potent ...
  • Exploring a StateTribal Partnership to Advance Energy Goals
    Exploring a State-Tribal Partnership to Advance Energy Goals
    Chan, Gabriel
    2023-04-01 | PDF
    The Red Lake Nation is exploring the development of a solar project on tribal land. MnDOT has an opportunity to enter into a virtual power purchase agreement (VPPA) with the Red Lake Nation for the purchase of solar electricity. A VPPA is a unique contracting method in which the tribe would develop the project, produce the electricity and sell it i ...
  • The Role of Gender and Identity in Travel Behavior
    The Role of Gender and Identity in Travel Behavior
    Song, Ying
    2023-04-01 | PDF
    MnDOT’s Advancing Transportation Equity Initiative focuses on ensuring the transportation network, services and decision- making meet the needs of Minnesota’s underserved or underrepresented communities. Understanding the needs, challenges and overall experiences of these communities is crucial to advancing an equitable transportation system. Publi ...
  • Incorporating Crash Severity and Continuous Improvement of SHIFT
    Incorporating Crash Severity and Continuous Improvement of SHIFT
    Souleyrette, Reginald ;
    Tanzen, Riana
    2023-04-01 | PDF
    The Strategic Highway Investment Formula for Tomorrow (SHIFT) is the Kentucky Transportation Cabinet's data-informed approach for comparing capital improvement projects and prioritizing limited transportation funds. SHIFT 2022 incorporates advancements in methods and flexibility. This project revises the SHIFT crash data safety metric. The crash da ...
  • Side Impact Guards for Combination TruckTrailers CostBenefit Analysis
    Side Impact Guards for Combination Truck-Trailers: Cost-Benefit Analysis
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2023-04-01 | National Transportation Statistics (NTS) | PDF
    This analysis presents the benefits and costs of requiring trailers of combination trucks (CTs) or articulated trucks consisting of a tractor unit and one or more attached trailers to be equipped with side impact guards to mitigate injuries and fatalities resulting from side-underride crashes involving CTs and light passenger vehicles (LPVs). LPVs ...
  • Snow Depth Retrieval with an Autonomous UAVMounted SoftwareDefined Radar
    Snow Depth Retrieval with an Autonomous UAV-Mounted Software-Defined Radar
    Prager, Samuel ;
    Sexstone, Graham
    2023-04-01 | PDF
    We present results from a field campaign to measure seasonal snow depth at Cameron Pass, Colorado, using a synthetic ultrawideband software-defined radar (SDRadar) implemented in commercially available Universal Software Radio Peripheral (USRP) software-defined radio hardware and flown on a small hexacopter unmanned aerial vehicle (UAV). We coheren ...
  • Incorporating Variability in KYTC Planning and Project Development
    Incorporating Variability in KYTC Planning and Project Development
    Souleyrette, Reginald ;
    Wang, Teng
    2023-04-01 | PDF
    Transportation planning and design decisions are typically made using point estimates of traffic and safety measures. This report addresses the uncertainty of data used to make these decisions. It focuses on two data elements — project safety ratings and volume estimates from traffic counts. For safety ratings, the Kentucky Transportation Cabinet’s ...
  • Grand Forks East Grand Forks 2021 Travel Demand Model Update Executive Summary
    Grand Forks East Grand Forks 2021 Travel Demand Model Update: Executive Summary
    Motuba, Diomo ;
    Habib, Muhammad Faisal
    2023-04-01 | PDF
    The Grand Forks East Grand Forks MPO's (The Forks MPO) Travel Demand Model (TDM) is updated every five years to reflect new ground truths/data and the advancements in the state-of-the-art in transportation modeling techniques and methods. The current update reflects the base year 2021 data. The model is a four-step TDM including trip generations, t ...
  • Overview of Motor Vehicle Traffic Crashes in 2021
    Overview of Motor Vehicle Traffic Crashes in 2021
    Stewart, Timothy
    2023-04-01 | PDF
    This technical report provides an overview of motor vehicle traffic crashes in 2021. There were 42,939 people killed in motor vehicle traffic crashes on U.S. roadways during 2021, a 10-percent increase from 39,007 fatalities in 2020, or 3,932 more people killed in traffic crashes in 2021. The estimated number of people injured on our roadways incre ...
  • Drainage 101 County Roadways City Street and Drainageways Best Practices and Resource Guide
    Drainage 101 County Roadways, City Street and Drainageways: Best Practices and Resource Guide
    Arvidson, Tim
    2023-04-01 | PDF
    The time individual engineers, administrators and their staff invest in researching drainage law and defining the best approach to solving drainage issues can be considerable. This document provides quick access to information needed to solve those problems and discover legal solutions to recurring drainage issues and the time saved could be invest ...
  • Multisource Data Fusion for RealTime and Accurate Traffic Incident Detection via Predictive Analytics
    Multisource Data Fusion for Real-Time and Accurate Traffic Incident Detection via Predictive Analytics
    Stamatiadis, Polichronis ;
    Gartner, Nathan H.
    2023-04-01 | PDF
    The objectives of this study are to (1) identify data sets available to MassDOT that can be used for realtime incident detection; (2) investigate how data from different sources can be integrated to improve incident detection; and (3) develop guidance for establishing trigger points to alert Highway Operations Center (HOC) operators about incidents ...
  • Reducing the Environmental Impact of Road Construction
    Reducing the Environmental Impact of Road Construction
    McLaughlin, Richard A. ;
    Heitman, Joshua L
    2023-04-01 | PDF
    Construction of roads exposes large areas of soil which can lead to high erosion rates. Current best management practices are good at keeping larger sized particles on-site, but smaller particles still remain a problem for construction site stormwater discharges. Turbid water leaving construction sites can have detrimental impacts for the surroundi ...
  • Central Plains Grain Farm Truck Fleet Marketing Patterns
    Central Plains Grain Farm Truck Fleet & Marketing Patterns
    Dybing, Alan ;
    Vachal, Kimberly
    2023-04-01 | PDF
    A survey of farm operators in the Central Plains Region, including Illinois, Indiana, Iowa, Kansas, and Nebraska, was conducted to gather information about transportation of crops, the inventory and characteristics of farmer-owned truck fleets, and on-farm storage capacity. The objective of the study is to provide information about the farm truck i ...
  • Improving Driver Yielding to Pedestrians at Intersections Summary
    Improving Driver Yielding to Pedestrians at Intersections [Summary]
    Dallman, Amber ;
    Morris, Nichole
    2023-04-01 | PDF
    Pedestrian deaths are at a 30-year high nationally—a trend that is mirrored in Minnesota. Previous research in Saint Paul found that driver yielding significantly increased at unsignalized crosswalks following a multifaceted approach that included the installation of signage and other low-cost engineering solutions combined with enforcement through ...
  • Guidelines for Determining Speed Limits on Municipal Roadways
    Guidelines for Determining Speed Limits on Municipal Roadways
    Miner, Kate ;
    Arvidson, Tim
    2023-04-01 | PDF
    The issue of reducing speed limits to increase public safety is an emotional, political, and controversial topic that has been debated by safety advocates, engineers, politicians, transportation ofcials, and the public for many years. A recent statutory change has put a spotlight on the topic, necessitating a deeper look into how speed limits are e ...
  • Peak Temperature Determination of Drilled Shafts Excluded From Mass Concrete Consideration in Current Specifications
    Peak Temperature Determination of Drilled Shafts Excluded From Mass Concrete Consideration in Current Specifications
    Mullins, Gray ;
    Lewis, Amanda
    2023-04-01 | PDF
    Drilled shafts are reinforced concrete deep foundation elements that typically range in diameter from 3 to 15 feet. Within the past 20 years, drilled shaft installation plans for FDOT projects have gone from requiring no mass concrete information (regardless of shaft diameter) to requiring steps to control temperature for shafts greater than 6 feet ...
  • Impaired Active Transportation Users
    Impaired Active Transportation Users
    Burbidge, Shaunna K. ;
    Singleton, Patrick A.
    2023-04-01 | PDF
    Researchers have determined that a significant number of pedestrian and bicycle crashes arise from intoxicated non-motorists (Hutchinson, Kloeden, and Lindsay, 2010). While driver and non-motorized fatalities have decreased significantly over several decades, the extent of alcohol involvement has declined significantly only among fatally injured dr ...
  • Shear and Bearing Capacity of Corroded Steel Beam Bridges and the Effects on Load Rating
    Shear and Bearing Capacity of Corroded Steel Beam Bridges and the Effects on Load Rating
    Kanakamedala, Deven ;
    Seo, Jungil
    2023-04-01 | PDF
    Corrosion in the girders of steel girder bridges often occurs due to the deicing salts, water, and other debris that leak through the deck joints into the web and bottom flange at the girder ends. Corrosion causes loss of cross-sectional area leading to a reduction in section properties of the member, which eventually results in a reduction in stru ...
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