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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 2661 - 2680 of 36873 results
  • Langdon Walkability Assessment 2022
    Langdon Walkability Assessment 2022
    Sharma, Kshitij
    2023-01-01 | PDF
    A community is considered walkable if it is easy as well as safe for pedestrians to walk for recreation, exercise, and to school, stores, parks, the post office, etc. Additionally, a walkable community encourages safe use of existing infrastructure while expanding transportation options for users with varied ranges of mobility. This report document ...
  • Optimizing Maintenance Equipment Tracking Fact Sheet
    Optimizing Maintenance Equipment Tracking [Fact Sheet]
    Nazzal, Munir D
    2023-01-01 | PDF
    This report summarizes the results of a project that was completed to develop a system to allow multiple ODOT users with different administrative authority to locate and schedule different types of equipment in ODOT district and county garages. The project was divided into two phases. The results of Phase 1 indicated that the optimum tracking syste ...
  • Optimizing Maintenance Equipment Tracking
    Optimizing Maintenance Equipment Tracking
    Nazzal, Munir D ;
    Manasreh, Dmitry
    2023-01-01 | PDF
    This report summarizes the results of a project that was completed to develop a system to allow multiple ODOT users with different administrative authority to locate and schedule different types of equipment in ODOT district and county garages. The project was divided into two phases. The results of Phase 1 indicated that the optimum tracking syste ...
  • Investigation into the Contributing Factors to the Corrosion of Steel Reinforced Concrete Structures at Elevations Greater than 12 Feet above the Mean HighWater Line
    Investigation into the Contributing Factors to the Corrosion of Steel Reinforced Concrete Structures at Elevations Greater than 12 Feet above the Mean High-Water Line
    Presuel–Moreno, Francisco J ;
    Santillan, Ingrid
    2023-01-01 | PDF
    The main objective of this project was to gain a better understanding and insight as to why corrosion takes place at elevations higher than 12 feet above the mean high-water line (>MHWL+12) for tall components that are part of the substructure (piles, columns, footers) of bridges that are partially immersed. There are several factors that influence ...
  • Collect Data Using Connected Vehicles CV for RealTime and Future Use
    Collect Data Using Connected Vehicles (CV) for Real-Time and Future Use
    Zhou, Kun
    2023-01-01 | PDF
    Current Intelligent Transportation System (ITS) equipment used for "sensing" the operations of highways are very limited, both in geographic coverage and in the measured data they can provide. To effectively monitor, measure, and manage the Daily Vehicle-Hours of Delay (DVHD) on the transportation network, transportation agencies must again focus o ...
  • FDOT Land Use Analysis to Enhance Successful Logistics Activity Center Summary
    FDOT Land Use Analysis to Enhance Successful Logistics Activity Center [Summary]
    Fitzgerald, Rickey ;
    Ozkul, Seckin
    2023-01-01 | PDF
    As the third most populous state in the U.S., Florida has many attractive qualities – sunshine and beaches, no state income tax, and a diversity of tourist attractions from the panhandle to the peninsula. But is Florida missing out on other business opportunities? Florida’s massive population growth brings an emphasis on freight and logistics. The ...
  • NJDOT Highway Safety Improvement Program Implementation Plan
    NJDOT Highway Safety Improvement Program Implementation Plan
    Hopwood, Cory ;
    Motamed, Megan
    2023-01-01 | PDF
    The New Jersey Department of Transportation (NJDOT) researched the predictive safety analysis tools available in the market and how they are being used by State Departments of Transportation (DOT). These tools have proliferated since the American Association of State Highway and Transportation Officials (AASHTO) released the Highway Safety Manual ( ...
  • Reducing Winter Maintenance Equipment Fuel Consumption Using Advanced Vehicle Data Analytics Report
    Reducing Winter Maintenance Equipment Fuel Consumption Using Advanced Vehicle Data Analytics [Report]
    Northrop, William ;
    Reddy Challa, Dinesh
    2023-01-01 | PDF
    This project analyzes the impact that idling and snowfall have on the fuel consumed by Minnesota Department of Transportation (MnDOT)’s snowplow fleet, with the underlying objective to determine and advise MnDOT on ways to reduce fuel usage of the fleet using vehicle telematics data. This is a significant problem to solve as fuel use reduction cont ...
  • Development of Environmental Product Declarations EPDs for Sustainable Pavement Procurement Research Brief
    Development of Environmental Product Declarations (EPDs) for Sustainable Pavement Procurement [Research Brief]
    Senseney, Christopher T ;
    Wieden, Craig
    2023-01-01 | PDF
    HB 21-1303, the “Buy Clean Colorado Act” requires contractors to submit EPDs for asphalt and asphalt mixtures, cement and concrete mixtures, and steel installed on CDOT projects. Ultimately, the bill instructs CDOT to establish greenhouse gas (GHG) emission limits for these materials, and contractors on CDOT construction projects will need to compl ...
  • Asset Management for Mobility and ITS
    Asset Management for Mobility and ITS
    Bledsoe, Jay ;
    Bittner, Jason
    2023-01-01 | PDF
    The Federal Highway Administration currently requires pavement and bridge National Highway System assets to be managed through a formal plan at the statewide level regardless of ownership. The methods for Transportation Asset Management planning for pavements and bridges are relatively well defined and mature. To incorporate evolving technologies a ...
  • Energy Harvesting on New Jersey Roadways Technical Brief
    Energy Harvesting on New Jersey Roadways [Technical Brief]
    Wang, Hao ;
    Venkiteela, Giri
    2023-01-01 | PDF
    The objective of this research is to identify potential energy harvesting technology for applications on roadways and bridges and conduct feasibility analysis and performance evaluation of selected technologies for large-scale and micro-scale energy generation. The research outcome provides recommendations for future implementation of energy harves ...
  • Geotechnical Asset Management for Louisiana
    Geotechnical Asset Management for Louisiana
    Gautreau, Gavin P. ;
    Lee, Adele
    2023-01-01 | PDF
    This research advanced Geotechnical Asset Management (GAM) within DOTD. It describes the logic and software utilized to develop the DOTD retaining wall inventory and outlines a GAM path forward for the Department. The developed GAM GIS database provides geospatial locations, digital storage, digital rating applications, and visual interfaces for re ...
    Supporting Files
  • Peak Mean and LowStreamflow RegionalRegression Equations for Natural Streamflow in Central and Western Colorado 2019
    Peak-, Mean-, and Low-Streamflow Regional-Regression Equations for Natural Streamflow in Central and Western Colorado, 2019
    Kohn, Michael S. ;
    Mast, M. Alisa
    2023-01-01 | PDF
    The U.S. Geological Survey (USGS), in cooperation with the Colorado Department of Transportation, developed peak-, mean- and low-streamflow regional-regression equations for estimating various streamflow statistics for natural streamflow in central and western Colorado. At the completion of the streamgage selection process, a total of 418 streamgag ...
  • Innovative Techniques and Materials for Preventing Concrete Shrinkage Cracking
    Innovative Techniques and Materials for Preventing Concrete Shrinkage Cracking
    Lomboy, Gilson R. ;
    Cleary, Douglas B.
    2023-01-01 | PDF
    Cracks weaken concrete and permit water and harmful chemical ingress into structures. Shrinkage also decreases the load-carrying capacity of bridges. This study investigates shrinkage cracking prevention of infrastructure concretes used in New Jersey. The 15 initial evaluation mixtures were first tested to evaluate their shrinkage behavior. Based o ...
  • Design and Monitoring of NonProprietary UHPC Joints of Precast Elements
    Design and Monitoring of Non-Proprietary UHPC Joints of Precast Elements
    Floyd, Royce ;
    Volz, Jeffery S.
    2023-01-01 | PDF
    This project included collection of UHPC connection details utilized by other states and examination of those details for applicability to use with the OU J3 non-proprietary UHPC, examination of different fiber sources and the effect of those fibers on properties of the OU J3 UHPC mix, consultation on and monitoring of UHPC projects in Oklahoma, an ...
  • Maintenance of Roadway Edge DropOff Utilizing Readily Available Materials
    Maintenance of Roadway Edge Drop-Off Utilizing Readily Available Materials
    Gautreau, Gavin P. ;
    Ferguson, Nicholas
    2023-01-01 | PDF
    The Louisiana Department of Transportation and Development (DOTD) District 05, which is in the northeastern corner of the state, spent 55,000 hours and over $1 million in 2016 attempting to maintain roadway edges along non-paved shoulders. Non-paved shoulders consist primarily of a soil and aggregate mixture, which is routinely disturbed and lost u ...
  • Determining Optimal Traffic Opening Time Through Concrete Strength Monitoring Wireless Sensing Summary
    Determining Optimal Traffic Opening Time Through Concrete Strength Monitoring: Wireless Sensing [Summary]
    Lu, Na
    2023-01-01 | PDF
    Construction and concrete production procedures are time sensitive and fast paced. As such, it is crucial to monitor the strength of concrete in real-time. Existing concrete strength testing methods, such as traditional hydraulic compression method specified by ASTM C 39 and the maturity method specified by ASTM C 1074, can be inaccurate, labor int ...
  • Guidelines for Evaluating Safety Using Traffic Encounters Proactive Crash Estimation on Roadways with Conventional and Autonomous Vehicle Scenarios
    Guidelines for Evaluating Safety Using Traffic Encounters: Proactive Crash Estimation on Roadways with Conventional and Autonomous Vehicle Scenarios
    Tarko, Andrew P. ;
    Romero, Mario A.
    2023-01-01 | PDF
    With the expected arrival of autonomous vehicles, and the ever-increasing levels of automation in today’s human driven vehicles, road safety is changing at a rapid pace. This project aimed to address the need for an efficient and rapid method of safety evaluation and countermeasure identification via traffic encounters, specifically traffic conflic ...
  • Efficient Model for Predicting Friction on Texas Highway Network
    Efficient Model for Predicting Friction on Texas Highway Network
    Sabillon, Christian ;
    Hernandez, Joaquin
    2023-01-01 | PDF
    The objective of this project was to develop a model to predict friction that could be applied at the network level to overcome some of the issues associated with friction measuring equipment. This project developed an instrument that can collect high-resolution surface profiles to determine macrotexture and microtexture under different conditions ...
  • Examining Data Needs and Implementation Process of AVBased Microtransit Service A Case Study in Lake Nona
    Examining Data Needs and Implementation Process of AV-Based Microtransit Service: A Case Study in Lake Nona
    Peng, Zhong-Ren ;
    Liu, Yanghe
    2023-01-01 | PDF
    The development of Autonomous vehicles (AVs) has brought many opportunities but implementing AV-based public transportation services has numerous unforeseen issues. One primary research gap is that existing studies on AV transit systems consist of predictions and speculation without actual cases and data support. Another issue is that a measurement ...
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