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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 7201 - 7220 of 36114 results
  • Evaluation of Tack Coat Materials on Longitudinal Joints in Louisiana
    Evaluation of Tack Coat Materials on Longitudinal Joints in Louisiana
    Cooper, Samuel
    2018-02-01 | PDF
    One of the advantages of asphalt pavements is that they can minimize traffic disruptions by being paved and opened to traffic quickly. Often, asphalt paving is performed while traffic is maintained in an adjacent lane. The disadvantage of this construction technique is it leads to the formation of longitudinal joints. A longitudinal joint is a cons ...
    Supporting Files
  • Updating the Crash Modification Factors and Calibrating the IHSDM for Indiana
    Updating the Crash Modification Factors and Calibrating the IHSDM for Indiana
    Tarko, Andrew P. ;
    Romero, Mario
    2018-02-01 | PDF
    The Interactive Highway Safety Design Model (IHSDM) is a tool for assessing the safety impact of project-level design decisions by implementing the HSM crash prediction methodology. Safety Performance Functions (SPFs), Crash Modification Factors/Functions (CMFs), calibration factors, and crash proportions are utilized in predicting the number, seve ...
  • Intelligent Compaction and Infrared Scanning Field Projects with Consulting Support
    Intelligent Compaction and Infrared Scanning Field Projects with Consulting Support
    Chang, George K. ;
    Mohanraj, Kiran
    2018-02-01 | PDF
    The Missouri Department of Transportation (MoDOT) was awarded a grant from the FHWA Accelerated Innovation Deployment (AID) program, in 2016. MoDOT provided the required matching funds to support this Intelligent Compaction (IC) and Infrared Scanning (IR) Field Projects with Consulting Support in 2017. The consulting support was provided by the Tra ...
  • Developing representative truck configurations for bridge load ratings Research Spotlight
    Developing representative truck configurations for bridge load ratings: Research Spotlight
    Eamon, Christopher D. ;
    Siavashi, Sasan
    2018-02-01 | PDF
    MDOT engineers calculate bridge load ratings using a list of representative vehicle configurations on Michigan roadways. Since the list was developed in the 1970s, bridge engineers were concerned it was outdated and they wanted to verify the accuracy of bridge load rating results. Using weigh-in-motion (WIM) data from sites across the state, resear ...
  • Multiscale Condition and Structural Analysis of Steel Bridge Infrastructure
    Multiscale Condition and Structural Analysis of Steel Bridge Infrastructure
    McConnell, Jennifer ;
    Bai, Tian
    2018-02-01 | PDF
    The deteriorating state of the nation's highway infrastructure is well known. Yet, the data that exists or can be obtained regarding the condition and behavior of this infrastructure presently exceeds the profession's ability to make efficient use of said data. In this work, the depth and breadth of three data types (NBI data, owner inspection repo ...
  • Evaluation of Urban Freight Deliveries using Microsimulation and Surrogate Safety Measures
    Evaluation of Urban Freight Deliveries using Microsimulation and Surrogate Safety Measures
    Gonzales, Eric J. ;
    Keegan, Aaron
    2018-02-01 | PDF
    Freight deliveries on signalized urban streets are known to cause lane blockages during deliveries. When delivery vehicles block lanes of traffic near signalized intersections, the capacity of the intersection is affected. Current practice is for traffic signals to be timed assuming that each approach can serve vehicles at the unobstructed saturati ...
  • Use of Infrared Thermography for the Inspection of Welds in the Shop and Field Summary
    Use of Infrared Thermography for the Inspection of Welds in the Shop and Field [Summary]
    Duke, Steven M. ;
    Manuel, Michele V.
    2018-02-01 | PDF
    Steel bridges are created by welding steel components. The quality of these welds is critical to the integrity of the bridge. Weld defects can lead to expensive repairs or mechanical failure. However, weld defects are often below the steel surface and in places that are difficult to reach; therefore, the search for improved methods of weld inspecti ...
  • Infiltration Basins Standards and Procedures to Ensure Performance
    Infiltration Basins : Standards and Procedures to Ensure Performance
    Linsenmayer, Mark ;
    Van Sluijs, Sharon M.
    2018-02-01 | PDF
    Infiltration basins have been a common means of stormwater management across the United States, as well as internationally, for more than three decades. A large constructed soil basin—up to 50 acres in area—with a complex permeable base and engineered pretreatment inflow and sides is designed to allow stormwater to infiltrate into the soil within 7 ...
  • Systematic Approach to Identifying Deeply Buried Archeological Deposits
    Systematic Approach to Identifying Deeply Buried Archeological Deposits
    Layzell, Anthony ;
    Mandel, Rolfe D.
    2018-02-01 | PDF
    Traditional methods used to discover archeological sites include pedestrian surface surveys and relatively shallow hand-dug shovel or soil core testing. While these methods are appropriate for locating surface and near-surface sites on ridges, hilltops, and on the surface of valley floors, they do not adequately identify archeological remains burie ...
  • Domestic Airline Fares Consumer Report Third Quarter 2017 Passenger and Fare Information
    Domestic Airline Fares Consumer Report: Third Quarter 2017 Passenger and Fare Information
    United States. Department of Transportation
    2018-02-01 | 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 ...
  • Materials Properties and Optimum Geometries of the Design of Noise Walls
    Materials, Properties, and Optimum Geometries of the Design of Noise Walls
    Donavan, Paul ;
    Janello, Carrie
    2018-02-01 | PDF
    This research addressed barrier design features that could enhance noise wall performance. It was concluded that application of a horizontal T-top to a conventional straight vertical wall was the most promising. This was established through literature review, scale model testing, and meetings with noise wall suppliers. Field measurements of noise l ...
  • Development of Statewide Guidelines for Implementing Leading Pedestrian Intervals in Florida Summary
    Development of Statewide Guidelines for Implementing Leading Pedestrian Intervals in Florida [Summary]
    El-Urfali, Alan ;
    McPherson, Trenda
    2018-02-01 | PDF
    Pedestrian safety is always a high priority for the Florida Department of Transportation (FDOT), especially as FDOT moves Florida toward a truly multimodal transportation system. Intersections are where vehicles and pedestrians are most likely to interact and where most pedestrian injuries occur so intersections are a focal point for improving pede ...
  • US Department of Transportation Strategic Plan FY 20182022
    U.S. Department of Transportation Strategic Plan: FY 2018-2022
    United States. Department of Transportation
    2018-02-01 | PDF
    The establishment of the U.S. Department of Transportation in 1967 combined 31 disparate elements of the Federal Government with transportation responsibilities under one Department. The purpose of establishing the Department was to coordinate and administer Federal transportation programs; provide leadership in the identification and resolution of ...
  • Analyzing Mobility Patterns and Imbalance of Free Floating Bike Sharing Systems
    Analyzing Mobility Patterns and Imbalance of Free Floating Bike Sharing Systems
    Pal, Arita ;
    Kwon, Changhyun
    2018-01-31 | PDF
    Bike Sharing is a sustainable mode of urban mobility, not only for regular commuters but also for casual users and tourists. Free floating bike sharing (FFBS) is an innovative bike sharing model, that saves on start-up cost, prevents bike theft, and offers significant opportunities for smart management by tracking bikes in real-time with built-in G ...
  • Pedestrian Safety Improvement Program Phase 2
    Pedestrian Safety Improvement Program: Phase 2
    Griswold, Julia ;
    Medury, Aditya
    2018-01-31 | PDF
    The Pedestrian Safety Improvement Program is an effort of the California Department of Transportation (Caltrans) to identify and address problems with regard to pedestrian safety in California, with the long-term goal of substantially reducing pedestrian fatalities and injuries in California. The efforts and findings presented in this report reflec ...
  • Driving Simulator Based Interactive Experiments Understanding Driver Behavior Cognition and Technology Uptake under Information and Communication Technologies
    Driving Simulator Based Interactive Experiments : Understanding Driver Behavior, Cognition and Technology Uptake under Information and Communication Technologies
    Agrawal, Shubham ;
    Song, Dongyoon
    2018-01-31 | PDF
    Advanced Traveler Information Systems (ATIS) and in-vehicle information systems (IVIS) are becoming an integral part of the current driving experience. Although information through in-vehicle technologies provides assistance to drivers with diverse travel-related information (for example, real-time traffic information, weather forecast, and warning ...
  • Bridge Girder Alternatives for Extremely Aggressive Environments
    Bridge Girder Alternatives for Extremely Aggressive Environments
    Brown, Jeff R. ;
    Kim, Daewon
    2018-01-31 | PDF
    The primary objective of this study was to identify viable alternatives for fiber-reinforced polymer (FRP) bridge girders and evaluate their potential for use in extremely aggressive environments in Florida. The first phase of the study included a comprehensive survey of in-service FRP-girder bridges in the U.S. along with several projects in Europ ...
    Supporting Files
  • CostEffective Uses of Lightweight Aggregate Made from Dredged Material in Construction
    Cost-Effective Uses of Lightweight Aggregate Made from Dredged Material in Construction
    Liu, Rui ;
    Appelbaum, Emily
    2018-01-31 | PDF
    Lightweight aggregate (LWA) can be used in concrete to reduce its self-weight and improve its workability and durability. It could potentially be used as borrow for embankment construction, which is expected to reduce the stresses on the subgrade foundation and reduce bridge approach slab settlement. However, the average estimated cost of LWA in U. ...
  • Reappraisal of the Specification for Aggregate Base Course ABC
    Re-appraisal of the Specification for Aggregate Base Course (ABC)
    Montoya, Brina M. ;
    Castorena, Cassie
    2018-01-31 | PDF
    The current specification for acceptance of Aggregate Base Course (ABC) materials consists of a band-type gradation specification, which is essentially a “recipe” that dictates the mass percentages of the individual particle sizes constituting the ABC. These specifications were developed about a half century ago with few adjustments since then and ...
  • Underwater Fiber Reinforced Polymer FRP Wrap Experimental Project
    Underwater Fiber Reinforced Polymer (FRP) Wrap Experimental Project
    Bickford, Dawn
    2018-01-30 | PDF
    In 2017, The Maine Department of Transportation in collaboration with the Kenway Corporation and Construction Divers Inc. (CDI), completed a rehabilitation project on the Rices Bridge (#2715) over the York River in York, Maine. The project was to address the premature failure, after only 12 years, of the fusion bonded epoxy protective coatings on t ...
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