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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 7041 - 7060 of 36104 results
  • Phase II Evaluation of Floor Pan Tearing for Cable Barrier Systems
    Phase II Evaluation of Floor Pan Tearing for Cable Barrier Systems
    Meyer, Dylan T. ;
    Pajouh, Mojdeh Asadollahi
    2018-03-30 | PDF
    The objective of this research effort was to mitigate the potential for floor pan tearing and penetration into the occupant compartment by modifying the posts utilized in a prototype cable barrier system. A series of dynamic component tests were conducted on the modified Midwest Weak Post (MWP). A bogie vehicle was equipped with a simulated floor p ...
  • Safety and Cost Assessment of Connected and Automated Vehicles
    Safety and Cost Assessment of Connected and Automated Vehicles
    Hendrickson, Chris T. ;
    Harper, Corey
    2018-03-29 | PDF
    Many light-duty vehicle crashes occur due to human error and distracted driving. The National Highway Traffic Safety Administration (NHTSA) reports that ten percent of all fatal crashes and seventeen percent of injury crashes in 2011 were a result of distracted driving, while close to ninety percent of all crashes occur in part due to human error ( ...
  • Toward Smart Automotive Headlights for Safe Driving
    Toward Smart Automotive Headlights for Safe Driving
    Narasimhan, Srinivasa G.
    2018-03-29 | PDF
    The long-term goal of the project is to develop the next generation headlights for vehicles, that are programmable, multi-task, react to the road environment and enhance driver safety. These smart headlights will better illuminate the road, spotlight obstacles, signs and lanes, project directions on the road, reduce glare and increase visibility in ...
  • Outdoor Advertising Report Changeable Message Signs
    Outdoor Advertising Report: Changeable Message Signs
    California. Department of Transportation
    2018-03-28 | PDF
    The California Department of Transportation (Caltrans) has prepared this report in response to Senate Bill 853 (Committee on Budget and Fiscal Review, Chapter 27, Statutes of 2014) regarding advertising on changeable message signs (CMS) on the State highway system. The report examines only the feasibility of conducting a pilot to place commercial o ...
  • Incentivizing Safer Driving Using PeerPressure
    Incentivizing Safer Driving Using Peer-Pressure
    Pentland, Alex ;
    Shmueli, Erez
    2018-03-28 | PDF
    This UTC final report examines the effectiveness of monetary incentives based on real-time monitoring as means to improve driving behavior of company car drivers. We conducted a 5-months 60-drivers field study with one of the largest public transportation companies in Israel. Driving behavior was measured continuously using In-Vehicle Data Recorder ...
  • An Innovative Design to Retrofit Seatbelts in Motorcoaches
    An Innovative Design to Retrofit Seatbelts in Motorcoaches
    Krishnamurty, Sundar
    2018-03-26 | PDF
    Prevention of passenger ejection from motor coach seats in the case of rollover and frontal crashes is critical for minimizing fatalities and injuries. This project proposed a novel concept of affordably retrofitting 3-point seatbelts to protect passengers during these significant crash scenarios. Prior to this project, the available options involv ...
  • New Excavation Technologies for Underground Construction Linear Cutting Machine Tests on MicrowaveIrradiated Granodiorite
    New Excavation Technologies for Underground Construction: Linear Cutting Machine Tests on Microwave-Irradiated Granodiorite
    Arora, Shrey ;
    Kaunda, Rennie B.
    2018-03-24 | PDF
    Recent breakthroughs in thermally induced rock fragmentation research indicate the feasibility of utilization of microwaves during rock excavation and tunneling. Unfortunately, few studies have been conducted to systematically assess energy requirements if these emerging technologies were implemented. Additional potential payoffs from the developme ...
  • IMPACTS OF BUS STOP IMPROVEMENTS
    IMPACTS OF BUS STOP IMPROVEMENTS
    Kim, Ja Young ;
    Bartholomew, Keith
    2018-03-23 | PDF
    Improving bus stops by providing shelters, seating, signage, and sidewalks is relatively inexpensive and popular among riders and local officials. Making such improvements, however, is not often a priority for U.S. transit providers because of competing demands for capital funds and a perception that amenities are not tied to measurable increases i ...
  • Express Lane Marker Color Human Factors Study on Concrete and OpenGraded Friction Course Impact Testing for Express Lane Markers Installed on OpenGraded Friction Course
    Express Lane Marker Color Human Factors Study on Concrete and Open-Graded Friction Course & Impact Testing for Express Lane Markers Installed on Open-Graded Friction Course
    Ali, Hesham ;
    Schulz, Nathan D.
    2018-03-23 | PDF
    As the use of express lanes is expanding in Florida, FDOT is developing material specifications for Express Lane Markers (ELM). To complete the specifications, highway product safety and impact testing was conducted to ensure an optimum service life of ELMs and evaluate the performance of several products and installation methods. The Department's ...
  • Low Cost Wireless Fatigue Crack Monitoring System Using RFID Arrays
    Low Cost Wireless Fatigue Crack Monitoring System Using RFID Arrays
    Martinez-Castro, Rosana ;
    Jang, Shinae
    2018-03-23 | PDF
    The use of welded steel cover plates had been a common design practice to increase beam section capacity in regions ofhigh torsion for decades. Many steel girder bridges with cover plates are still in service. Steel girder bridges are subject to cyclic loading, which can initiate crack formation at the toe of the weld and reduce beam capacity. Thus ...
  • Exploration of Machine Learning Approaches to Predict Pavement Performance
    Exploration of Machine Learning Approaches to Predict Pavement Performance
    Nath, Ravi ;
    Duckworth, William
    2018-03-23 | PDF
    Machine learning (ML) techniques were used to model and predict pavement condition index (PCI) for various pavement types using a variety of input variables. The primary objective of this research was to develop and assess PCI predictive models for the years 2014 and 2015 based upon the 2013 PCI values and other road characteristics during calendar ...
    Supporting Files
  • Pavement Performance Approaches Using Predictive Analytics
    Pavement Performance : Approaches Using Predictive Analytics
    Duckworth, William ;
    Nath, Ravi
    2018-03-23 | PDF
    Acceptable pavement condition is paramount to road safety. Using predictive analytics techniques, this project attempted to develop models that provide an assessment of pavement condition based on an array of indictors that include pavement distress, pavement type, traffic load, structural data, and pavement repair history. Data collected by the Io ...
  • An Assessment of the Models to Predict Pavement Performance
    An Assessment of the Models to Predict Pavement Performance
    Duckworth, William ;
    Nath, Ravi
    2018-03-23 | PDF
    Data collected by the Iowa Department of Transportation (DOT) regarding road conditions across the state of Iowa were used to model pavement condition index (PCI). The data were for calendar year 2013, with the exception of updated PCI values from 2014 and 2015 and indicators of the resurfacing of road segments in 2014 and 2015. The data file provi ...
  • Electric Vehicle and Wireless Charging Laboratory
    Electric Vehicle and Wireless Charging Laboratory
    Raustad, Richard ;
    Wilson, William
    2018-03-23 | PDF
    Wireless charging tests of electric vehicles (EV) have been conducted at the EVTC Wireless Laboratory located at the Florida Solar Energy Center, Cocoa, FL. These tests were performed to document testing protocols, evaluate standards and evaluate operational related wireless charging characteristics. The presented results give the charging efficien ...
  • Creation of a Sustainable Collaborative Transportation and Safety Model Tech Transfer Summary
    Creation of a Sustainable Collaborative Transportation and Safety Model : Tech Transfer Summary
    Zakery, Fara ;
    Eisel, Joyce
    2018-03-23 | PDF
    The objective of this project was to create a sustainable asset management transportation and safety model for a designated area of St. Louis, Missouri, that can be replicated in other municipalities.
  • Concentration on Pavement
    Concentration on Pavement
    Fay, Laura ;
    Akin, Michelle
    2018-03-21 | PDF
    This technical report summarizes the results of laboratory testing on asphalt and concrete pavement. A known quantity of salt brine was applied as an anti-icer, followed by snow application, traffic simulation, and mechanical snow removal via simulated plowing. Using a sample from this plowed snow, researchers measured the chloride concentration to ...
  • Investigation of Alternative Deicers for Snow and Ice Control
    Investigation of Alternative Deicers for Snow and Ice Control
    Fay, Laura ;
    Akin, Michelle
    2018-03-15 | PDF
    This technical report presents the findings of the laboratory analysis of potassium succinate (KSu) as a roadway deicer. Laboratory analysis included modified SHRP ice-melting testing, a differential scanning calorimetry (DSC) thermogram, and friction measurements to quantify performance. The overall results indicate that the performance of KSu is ...
  • Optimizing Future Work Zones in New England for Improved Safety and Mobility
    Optimizing Future Work Zones in New England for Improved Safety and Mobility
    Xie, Yuanchang ;
    Gartner, Nathan H.
    2018-03-15 | PDF
    This study addresses two critical aspects of highway work zone traffic operations, mobility and safety, by focusing on speed control and merge control strategies. It innovatively utilizes the Naturalistic Driving Study (NDS) data for analyzing work zone crash and near-crash events characteristics, and generates useful insights into how crashes and ...
  • Low Temperature and Moisture Susceptibility of RAP Mixtures with Warm Mix Technology
    Low Temperature and Moisture Susceptibility of RAP Mixtures with Warm Mix Technology
    Mogawer, Walaa S. ;
    Austerman, Alexander J.
    2018-03-15 | PDF
    A major concern with the use of Warm Mix Asphalt (WMA) technologies has been their impact on the moisture susceptibility of asphalt paving mixtures. This is due to the lower production temperatures associated with mixtures incorporating these technologies which could lead to inadequate drying of aggregates. The moisture susceptibility concern may b ...
  • RESEARCH EDUCATION AND OUTREACH FROM CAMPUS TRANSIT LABORATORY And CAMPUS TRANSIT LABORATORY INFRASTRUCTURE FOR RESEARCH EDUCATION AND OUTREACH
    RESEARCH, EDUCATION AND OUTREACH FROM CAMPUS TRANSIT LABORATORY : And CAMPUS TRANSIT LABORATORY : INFRASTRUCTURE FOR RESEARCH, EDUCATION, AND OUTREACH
    McCord, Mark R. ;
    Mishalani, Rabi G.
    2018-03-13 | PDF
    This report documents the activities conducted within the Campus Transit Lab (CTL) at The Ohio State University for the purposes of research, education, and outreach from Spring 2012 through Autumn 2017. CTL investigators utilized automatically and manually collected data from OSU Campus Area Bus Service (CABS) to support these goals. CTL investiga ...
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