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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 1041 - 1060 of 36049 results
  • Influencing Mode Shift Through Behavioral Change Strategies
    Influencing Mode Shift Through Behavioral Change Strategies
    Mishra, Sabyasachee ;
    Golias, Mihalis M.
    2024-07-01 | PDF
    This research is a behavioral approach to address the critical transportation challenges in Tennessee, particularly the reliance on Single Occupant Vehicles (SOVs). Despite efforts by different agencies across the US to promote sustainable alternatives through Travel Demand Management (TDM) initiatives, public participation and the effectiveness of ...
  • Data Acquisition and Processing Using Artificial Intelligence and Machine Learning
    Data Acquisition and Processing Using Artificial Intelligence and Machine Learning
    Loos, Ryan ;
    Egge, Mark
    2024-07-01 | PDF
    Artificial intelligence (AI) and machine learning (ML) offer state transportation agencies promising tools to help them advance their missions by informing decision making; improving information accuracy, completeness, and timeliness; and automating tedious tasks to free up valuable DOT resources. The objective of this research was to provide MoDOT ...
  • Enhancing the GDOTs Maintenance Decision Trees Considering the Effectiveness of Various Treatment Options in Different Geographical Locations and Over Time
    Enhancing the GDOT’s Maintenance Decision Trees Considering the Effectiveness of Various Treatment Options in Different Geographical Locations and Over Time
    Moore, Brian P ;
    Baek, Minsoo
    2024-07-01 | PDF
    The Georgia Department of Transportation (GDOT) is responsible for pavement management of 7,100 centerline miles, encompassing diverse terrain types. The conventional “one size fits all” approach is no longer viable as pavement condition depends on several internal and external factors that are different from district to district, e.g., material, c ...
  • Field Monitoring of a Mechanically Stabilized Earth Wall Backfilled with Lightweight Cellular Concrete
    Field Monitoring of a Mechanically Stabilized Earth Wall Backfilled with Lightweight Cellular Concrete
    Parsons, Robert L. ;
    Liu, Hao
    2024-07-01 | PDF
    As an alternative to aggregate as backfill material in mechanically stabilized earth (MSE) walls, lightweight cellular concrete (LCC) significantly reduces the weight of MSE wall mass, corresponding settlement of the foundation soil, and lateral earth pressures behind wall facing. Steel strips, geogrids, or steel rods are commonly used to reinforce ...
  • Findings From the Pavement Preservation Group PG Study
    Findings From the Pavement Preservation Group (PG) Study
    Vargas-Nordcbeck, Adriana ;
    Geib, Jerry
    2024-07-01 | PDF
    State and local agencies often face the challenge of managing their pavement networks with limited resources. The natural degradation of new pavements, influenced by traffic loads and environmental factors, necessitates attention. Extending the service life of pavements without resorting to costly rehabilitation or reconstruction activities is feas ...
  • Evaluation of LowQuality Recycled Concrete Pavement Aggregates for Subgrade Soil Stabilization
    Evaluation of Low-Quality Recycled Concrete Pavement Aggregates for Subgrade Soil Stabilization
    Tavakol, Massoumeh ;
    Kulesza, Stacey
    2024-07-01 | PDF
    Recycled concrete aggregate (RCA) is the byproduct of the demolition of concrete structures and pavements. The use of RCA to replace quarried aggregates in paving projects is one way to utilize these materials and alleviate concerns regarding this increasing waste stream. In this study, a low-plasticity clay in Kansas was stabilized using RCA and t ...
  • Traffic Safety Facts 2022 Data Large Trucks
    Traffic Safety Facts 2022 Data: Large Trucks
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2024-07-01 | PDF
    In 2022 there were 5,936 people killed in traffic crashes involving large trucks. This was a 2-percent increase from 5,821 in 2021. Seventy percent of people killed in large-truck traffic crashes in 2022 were occupants of other vehicles. Seventy-six percent of the fatal traffic crashes involving large trucks in 2022 occurred on weekdays (6 a.m. Mon ...
  • Fatigue Strength and Ductility of Steel Plates with Holes Made from Plasma Cutting Methods
    Fatigue Strength and Ductility of Steel Plates with Holes Made from Plasma Cutting Methods
    Ebert, Aurora ;
    Connor, Robert J.
    2024-07-01 | PDF
    A literature review was conducted to evaluate current standards and existing research around the use of plasma arc cutting for holes (PACH) in the context of steel bridge applications. Additionally, an investigation into the state of the practice was conducted to determine if the latest technological advancements and equipment capabilities for plas ...
  • Evaluation of LowQuality Recycled Concrete Pavement Aggregates for Portland CementTreated Base Technical Summary
    Evaluation of Low-Quality Recycled Concrete Pavement Aggregates for Portland Cement-Treated Base [Technical Summary]
    Daily, Koby ;
    Jones, Christopher
    2024-07-01 | PDF
    This research was divided into two studies. The first study focused on D-cracked recycled concrete aggregate (RCA) portland cement-treated base. RCA was obtained from D-cracked pavement sources in Topeka and Kansas City. These aggregates were used to batch three PCTB mixtures per RCA source. All mixes followed KDOT’s 90-day curing outlined in KTMR- ...
  • Developing a Hazard Detection and Alert System To Prevent Incidents
    Developing a Hazard Detection and Alert System To Prevent Incidents
    Song, Sejun ;
    Kim, Sungyop
    2024-07-01 | PDF
    The proposed project aimed to develop a cost-effective, user-friendly, and reliable hazard detection and alert system to prevent crashes between construction equipment/vehicles and workers on foot in work zones. The envisioned system includes wearable proximity sensors for the workers and an in-vehicle portable detection system for the operators. T ...
  • Identifying Transit Corridors With Greatest Potential To Benefit From Transit Signal Priority
    Identifying Transit Corridors With Greatest Potential To Benefit From Transit Signal Priority
    Sheffield, Michael H
    2024-07-01 | PDF
    Transit signal priority (TSP) is an operational strategy that facilitates the movement of transit vehicles through signal-controlled intersections. Transit vehicle delay can occur for many reasons including traffic congestion, passenger boarding and alighting, traffic signal operations, and other factors but TSP is specifically aimed at reducing de ...
  • Domestic Airline Fares Consumer Report First Quarter 2024 Passenger and Fare Information
    Domestic Airline Fares Consumer Report: First Quarter 2024 Passenger and Fare Information
    United States. Department of Transportation
    2024-07-01 | Domestic Airline Fares Consumer Report | PDF
    Each month the Department of Transportation releases an Air Travel Consumer Report that includes information about various service quality elements, including flight delays, mishandled baggage, over sales, and a variety of other types of consumer complaints. In response to an increasing number of inquiries from consumers about domestic airline pric ...
  • Evaluation of Corrosion Prevention and Mitigation Approaches Used on Texas Bridges Volume 1 Steel Girder Bridges
    Evaluation of Corrosion Prevention and Mitigation Approaches Used on Texas Bridges -- Volume 1: Steel Girder Bridges
    Hurlebaus, Stefan ;
    Birely, Anna C.
    2024-07-01 | PDF
    Corroded steel members cause significant risk to the durability of steel bridges, leading to costly failures and endangering public safety. Thus, it is essential to implement effective corrosion prevention and mitigation strategies to ensure the long-term durability of steel girders and reduce risks associated with corrosion activities. The Texas D ...
  • Traffic Safety Facts 2022 Data Speeding
    Traffic Safety Facts 2022 Data: Speeding
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2024-07-01 | PDF
    Twenty-eight percent of fatal crashes, 12 percent of injury crashes, and 8 percent of property-damage-only crashes in 2022 were speeding-related traffic crashes. In 2022 there were 12,151 fatalities in speeding-related crashes, 29 percent of total traffic fatalities for the year and a decrease of 3 percent from 12,498 in 2021. There were an estimat ...
  • Traffic Safety Facts 2022 Data Bicyclists and Other Cyclists
    Traffic Safety Facts 2022 Data: Bicyclists and Other Cyclists
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2024-07-01 | PDF
    In 2022 there were 1,105 pedalcyclist fatalities, accounting for 2.6 percent of all traffic fatalities. In 2022 there was a 13-percent increase in pedalcyclists killed (1,105) from the 976 pedalcyclists killed in 2021. In 2022 an estimated 46,195 pedalcyclists were injured, an 11-percent increase from 41,615 pedalcyclists injured in 2021. In 2022 t ...
  • Expanding Connected Vehicle Data Sources to Increase Applications and Use on Texas Roadways
    Expanding Connected Vehicle Data Sources to Increase Applications and Use on Texas Roadways
    McAuley, Anna ;
    Gold, Andrea
    2024-07-01 | PDF
    As connected freight and passenger vehicles become increasingly present on Texas roadways, the need for real-time, accurate, and cohesive data is growing. In some cases, this data is reliable and readily available to public agencies. In other cases, there are gaps in data availability or quality. A connected vehicle data framework (CVDF) enables th ...
  • Impacts of Autonomous TruckMounted Attenuator ATMA on INDOT Work Zone Safety Mobility and Worker Productivity
    Impacts of Autonomous Truck-Mounted Attenuator (ATMA) on INDOT Work Zone Safety, Mobility, and Worker Productivity
    Tian, Chi ;
    Feng, Yiheng
    2024-07-01 | PDF
    Work zone safety has been a major concern for many stakeholders, including the state Departments of Transportation (DOTs). To prevent DOT workers, especially truck mounted attenuator (TMA) drivers, from injuries, the Autonomous Truck Mounted Attenuator (ATMA) technology was developed. To understand the current testing and deployment status of ATMA, ...
  • Developing QualityControlled Datasets and Methods to Assess the Impact of Rain on Snow Events on Nevada Highways
    Developing Quality-Controlled Datasets and Methods to Assess the Impact of Rain on Snow Events on Nevada Highways
    Heggli, Anne ;
    Bean, Brennan
    2024-07-01 | PDF
    The most damaging effects of rain-on-snow (ROS) events are often the result of excess water flows disrupting downstream infrastructure. While rain on snow events have been well studied in previous literature, there exists little research that quantifies the impact of ROS events on infrastructure. This report outlines efforts to explore the influenc ...
  • Induced Travel Estimation Revisited
    Induced Travel Estimation Revisited
    Manville, Michael
    ORCID ICON IMG
    2024-07-01 | PDF
    Suppose a government adds two lanes to a highway in both directions but then restricts access to those lanes. The lanes will be “managed”—open only to people in carpools, or to people in single-occupancy vehicles who pay a toll. The toll will vary in response to demand, with the goal of avoiding congestion and keeping vehicles moving. Will the tota ...
  • Peaked Too Soon Analyzing the Shifting Patterns of PM Peak Period Travel in Southern California
    Peaked Too Soon? Analyzing the Shifting Patterns of PM Peak Period Travel in Southern California
    Speroni, Samuel ;
    Siddiq, Fariba
    2024-07-01 | PDF
    Daily vehicle travel collapsed with the onset of the COVID-19 pandemic in early 2020 but largely bounced back by late 2021. The pandemic caused dramatic changes to working, schooling, shopping, and leisure activities, and to the travel associated with them. Several of these changes have so far proven enduring. So, while overall vehicle travel had l ...
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