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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 4401 - 4420 of 36019 results
  • Development of WeighinMotion Data Quality Control Algorithms and Procedures
    Development of Weigh-in-Motion Data Quality Control Algorithms and Procedures
    Chorzepa, Mi G ;
    Kim, S. Sonny
    2020-08-01 | PDF
    This report recommends a Weigh-In-Motion (WIM) data quality control (QC) process that will assist in delivering higher quality WIM data and continuously improving WIM program performance as its user base grows within the Georgia Department of Transportation (GDOT). Specifically, this research study serves to establish a procedure for off-site offic ...
  • Development of Guidelines for Implementation of Contraflow LeftTurn Lanes at Signalized Intersections
    Development of Guidelines for Implementation of Contraflow Left-Turn Lanes at Signalized Intersections
    Qi, Yi ;
    Zhao, Qun
    2020-08-01 | PDF
    An innovative intersection design, Contraflow left-turn lane (CLL), designed for increasing the left-turn capacity has been increasingly implemented at the signalized intersections. This study developed a systematic method for determining the length of CLL and the signal timing plan for implementing CLL at signalized intersections. The signal timin ...
  • Assessment of Parcel Delivery Systems Using Unmanned Aerial Vehicles
    Assessment of Parcel Delivery Systems Using Unmanned Aerial Vehicles
    Boyles, Stephen D. ;
    Zhu, Tengkuo
    2020-08-01 | PDF
    The idea of deploying electric vehicles and unmanned aerial vehicles (UAVs), also known as drones, to perform "last-mile" delivery in logistics operations has attracted increasing attention in the past few years. In this paper, an electric vehicle travelling salesman problem with drone (EVTSP-D) is formulated as a mixed-integer/linear program to ai ...
  • Analysis of the Causes of Workforce Shortages Create Guidelines for Education and Workforce Development in Transportation to Generate Future Careers for the Navajo Nation
    Analysis of the Causes of Workforce Shortages: Create Guidelines for Education and Workforce Development in Transportation to Generate Future Careers for the Navajo Nation
    Ehteshami, Gholam R
    ORCID ICON IMG
    2020-08-01 | PDF
    Activities were dedicated to the collections, summarizations and categorizing more research articles related to the analysis of the sources of workforce deficiencies. The focus was on the technical and educational solution methods and strategies, guideline relevant to the workforce development. The times also were committed to the development of ed ...
  • Estimating the Costs of New Mobility Travel Options Monetary and NonMonetary Factors
    Estimating the Costs of New Mobility Travel Options: Monetary and Non-Monetary Factors
    Fulton, Lewis M ;
    Compostella, Junia
    2020-08-01 | PDF
    UC Davis researchers have developed a cost model of travel choices that individuals make related to urban vehicle travel. These choices can include deciding to own, ride in, and drive a private vehicle or use pooled or solo ridesourcing (e.g., Uber). The model considers both monetary and non-monetary factors that affect travel choice. Monetary fact ...
  • Destructive Testing of IDOT Bridge Structure Number 0203087
    Destructive Testing of IDOT Bridge Structure Number 020-3087
    Golecki, Thomas F. ;
    Spencer Jr, B. F.
    2020-08-01 | PDF
    The partial collapse of Illinois Department of Transportation structure 020-3087 on October 1, 2019, provided IDOT with the opportunity to evaluate the in situ strength of a precast, prestressed concrete deck beam bridge after 50 years in service. An undamaged beam was transported to the Newmark Structural Engineering Laboratory and tested in three ...
  • Multimodal Transportation Engineering Curriculum for Middle and High School Students
    Multimodal Transportation Engineering Curriculum for Middle and High School Students
    Willis, Olivia ;
    Reed, Cheryl
    2020-08-01 | PDF
    The goal of this Center for Advanced Multimodal Mobility Solutions and Education (CAMMSE) project was to engage local middle and high school students in transportation engineering activities that include pre- and post-testing in order to assess their learning and the factors that influenced their learning. To meet this goal, the following objective ...
  • MmWave Codebook Selection in RapidlyVarying Channels via Multinomial Thompson Sampling
    MmWave Codebook Selection in Rapidly-Varying Channels via Multinomial Thompson Sampling
    Zhang, Yi ;
    Basu, Soumya
    2020-08-01 | PDF
    Millimeter-wave (mmWave) communications, using directional beams, is a key enabler for high-throughput mobile ad hoc networks. These directional beams are organized into multiple codebooks according to beam resolution, with each codebook consisting of a set of equal width beams that cover the whole angular space. The codebook with narrow beams deli ...
  • Strategic and Operational Strategies to Inform First and Last Mile Services Case Studies for Robinson and Moon Townships
    Strategic and Operational Strategies to Inform First- and Last- Mile Services: Case Studies for Robinson and Moon Townships
    Grahn, Rick ;
    Qian, Sean
    2020-08-01 | PDF
    Traditional public transit is designed to serve high-density, urban areas with concentrated travel patterns using fixed routes and schedules. Mobility gaps exist for populations who are captive to public transit and need to travel to locations where public transit does not cover. Emerging technologies enable bridging such a gap by providing flexibl ...
  • Bridge Construction Monitoring using LIDAR for Quantified Objective QualityControl QualityAssurance QOQCQA
    Bridge Construction Monitoring using LIDAR for Quantified, Objective Quality-Control Quality-Assurance (QOQCQA)
    Moreu, Fernando ;
    Lippitt, Christopher D.
    2020-08-01 | PDF
    Transportation infrastructure construction quality control and quality assurance demands construction monitoring by field inspectors. Currently, these inspectors monitor infrastructure by measuring and photographing structures. These tasks allow them to assess any correction decision during construction or to inform about the quality of the constru ...
  • Life Cycle Environmental Impact of Houston METRO System Evaluation of Electric Alternatives
    Life Cycle Environmental Impact of Houston METRO System – Evaluation of Electric Alternatives
    Kommalapati, Raghava ;
    Du, Hongbo
    2020-08-01 | PDF
    In the Greater Houston Area, mobile sources (on- and off-road vehicles) contribute the highest share of nitrogen oxide (NOₓ) emissions and second-highest share of volatile organic (VOC) emissions. The Houston METRO system is a key element in Houston's infrastructure that can be expanded to lower emissions of criteria air pollutants (CAPs) and green ...
  • Monitoring and Performance Analysis of the TH 610 IronEnhanced Filtration System
    Monitoring and Performance Analysis of the TH 610 Iron-Enhanced Filtration System
    Mohseni, Omid
    2020-08-01 | PDF
    In 2011, the Minnesota Department of Transportation (MnDOT) installed an iron-enhanced sand filter (IESF) at Trunk Highway (TH) 610 and County Road 81 in Maple Grove, Minnesota. This feature is a two-cell filtration system into which part of Trunk Highway 610 and County Road 81 drain. From 2012 through 2018, MnDOT monitored the influents and efflue ...
  • A Roadway Context Classification Approach for Developing Safety Performance Functions and Determining Traffic Operational Effects for Florida Intersections
    A Roadway Context Classification Approach for Developing Safety Performance Functions and Determining Traffic Operational Effects for Florida Intersections
    Al-Deek, Haitham ;
    Sandt, Adrian
    2020-08-01 | PDF
    This research developed safety performance functions (SPFs) based on a new Florida Department of Transportation (FDOT) context classification system which contains eight context categories as opposed to the three classifications used in the Highway Safety Manual (HSM). To develop these context-specific SPFs, data were collected for several potentia ...
  • Comparison of SHRP 2 Naturalistic Driving Data to Geometric Design Speed Characteristics on Freeway Ramps [supporting datasets]
    Brewer, Marcus A. ;
    Stibbe, Jayson
    2020-08-01 | ZIP
    Project Description: Comparison of SHRP2 Naturalistic Driving Data to Geometric Design Speed Characteristics on Freeway Ramps” was a study sponsored by SAFE-D that examined data on freeway ramps from the SHRP2 NDS – speed profiles along with selected driver and vehicle variables – and compared that data to the design characteristics of the ramps tr ...
    Dataset Supporting Files
  • Extraction of Vehicle CAN Bus Data for Roadway Condition Monitoring
    Extraction of Vehicle CAN Bus Data for Roadway Condition Monitoring
    Li, Howell ;
    Saldivar-Carranza, Enrique
    2020-08-01 | PDF
    Obtaining timely information across the state roadway network is important for monitoring the condition of the roads and operating characteristics of traffic. One of the most significant challenges in winter roadway maintenance is identifying emerging or deteriorating conditions before significant crashes occur. For instance, almost all modern vehi ...
  • Exploring the Role of Transportation on Cancer Patient DecisionMaking Through Machine Learning Techniques
    Exploring the Role of Transportation on Cancer Patient Decision-Making Through Machine Learning Techniques
    Etminanighasrodashti, Roya ;
    Kan, Chen
    2020-08-01 | PDF
    Transportation barriers are often considered as critical factors that influence healthcare accessibility and cancer patients' decision-making regarding treatments or post-treatment process. Moreover, the built environment and lack of access to affordable and efficient transportation would significantly affect the quality of life of patients with ch ...
  • Durability Evaluation of Ternary Mix Designs for Extremely Aggressive Exposures Phase II
    Durability Evaluation of Ternary Mix Designs for Extremely Aggressive Exposures Phase II
    Riding, Kyle A ;
    Ferraro, Christopher C.
    2020-08-01 | PDF
    Concrete made with low transport properties can be very durable even in extremely aggressive environments. This study examined the ability of resistivity testing to determine transport properties for concrete containing ternary blends of portland cement with supplemental cementitious materials. The penetrability of the concrete was tested using rap ...
  • Develop New Methods to Use ODOT WeighinMotion Data for Predicting Freight Flow andor Commodity Patterns
    Develop New Methods to Use ODOT Weigh-in-Motion Data for Predicting Freight Flow and/or Commodity Patterns
    Anderson, Jason C. ;
    Unnikrishnan, Avinash
    2020-08-01 | PDF
    This study presents the results of a detailed analysis of Oregon weigh-in-motion (WIM) data. First, a quality control analysis was conducted considering Oregon Department of Transportation (ODOT) Class 11 (FHWA Class 09 trucks). Next, a set of descriptive analyses were conducted, one focusing on all WIM stations and one focusing on select WIM stati ...
  • Impact of Access Spacing Standards on Crash Risk After Controlling for Access Volumes
    Impact of Access Spacing Standards on Crash Risk After Controlling for Access Volumes
    Flintsch, Alejandra Medina ;
    Guo, Feng
    2020-08-01 | PDF
    Engineers and planners are typically tasked with approving new entrance permits, evaluating permitting exceptions, and generating safety countermeasures for specific corridors. Although several studies show that a smaller space between two access points is associated with an increased crash risk, the relationship between these two factors is not fu ...
  • Evaluation of LongTerm Performance of Stabilized Sediment for Beneficial Use
    Evaluation of Long-Term Performance of Stabilized Sediment for Beneficial Use
    Maher, Ali ;
    Miskewitz, Robert
    2020-08-01 | PDF
    Over the past twenty years, the state of New Jersey has accepted over 30 million cubic yards of material that have many practical uses. This study was conducted to develop a methodology based on existing studies, reviewing records, and visiting field sites. A total of 6 sites in NJ where stabilized dredged materials (SDM) had been used to augment a ...
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