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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 6881 - 6900 of 36104 results
  • Traffic Thresholds in Deer RoadCrossing Behavior
    Traffic Thresholds in Deer Road-Crossing Behavior
    Riginos, Corinna ;
    Smith, Chauncey
    2018-05-01 | PDF
    Roads have two major effects on ungulate populations: they can cause direct mortality through wildlife-vehicle collisions, and they can create partial to complete barriers to animal movements, cutting animals off fromfood and habitat resources they need. Wildlife-vehicle collisions are also dangerous and costly to the traveling public. The most eff ...
  • Emergency Operations Methodology for Extreme Winter Storm Events
    Emergency Operations Methodology for Extreme Winter Storm Events
    Sullivan, James ;
    Dowds, Jonathan
    2018-05-01 | PDF
    Winter storms have increased in frequency and intensity since the 1950s, and average annual precipitation is projected to continue to increase across the northern United States. In response to these trends, many states have developed, or are interested in developing, emergency-response plans for extreme winter storm events. This report provides a s ...
  • Foundation Reuse Length Condition and Capacity of Existing Driven Piles
    Foundation Reuse : Length, Condition, and Capacity of Existing Driven Piles
    Boeckmann, Andrew Z. ;
    Rosenblad, Brent L.
    2018-05-01 | PDF
    Reusing existing bridge foundations is an appealing design alternative for many bridge projects, but methods for investigating and analyzing existing foundations vary widely. Researchers from the University of Missouri performed research to evaluate various methods for predicting the installed length, assessing the condition, and predicting the loa ...
    Supporting Files
  • Design and Performance of Highly Skewed Deck Girder Bridges
    Design and Performance of Highly Skewed Deck Girder Bridges
    Okumus, Pinar ;
    Oliva, Michael G.
    2018-05-01 | PDF
    High skew alters load paths and creates unique performance problems. Acute corner deck cracking, bridge racking, overloading or uplifting at bearings, changes in shear and moment reactions can result due to live or thermal loads. This project investigates the performance of bridges in Wisconsin with high skew to identify limits for simplified analy ...
  • Evaluation of Rural Intersection Treatments
    Evaluation of Rural Intersection Treatments
    Hallmark, Shauna ;
    James, Jevan
    2018-05-01 | PDF
    Shauna Hallmark (orcid.org/0000-0001-5187-8022); Jevan James (orcid.org/0000-0003-1198-4909); Skylar Knickerbocker (orcid.org/0000-0002-0202-5872); Neal Hawkins (orcid.org/0000-0003-0618-6275); Raju Thapa (orcid.org/0000-0002-1930-0535); and Theresa Litteral (orcid.org/0000-0003-4978-6430);Because crashes at rural intersections frequently result fr ...
    Supporting Files
  • Evaluation of the WYDOT Research Center and Research Program Phase III
    Evaluation of the WYDOT Research Center and Research Program (Phase III)
    Saha, Promothes ;
    Greer, Nikolai A
    2018-05-01 | PDF
    An effective research center within a transportation organization can be a valuable asset to accomplish the goals of the overall mission. It is important to measure the benefits of transportation research center on a regular basis to determine if research budgets have been used effectively, and to maintain the support of management. The purpose of ...
  • New Mixture Additives for Sustainable Bituminous Pavements
    New Mixture Additives for Sustainable Bituminous Pavements
    Nsengiyumva, Gabriel Mukristu ;
    Kommidi, Santosh Reddy
    2018-05-01 | PDF
    In an effort to improve mechanical properties of asphalt concrete, an exploratory research using mixture additives was attempted. Two different types of additives on two material scales were used: asphalt concrete (AC) level and binder level. At the start of this study, the effect of natural cornhusk fibers on the resistance of two types of AC mixt ...
  • Roadways
    Roadways
    Roodi, Gholam H. ;
    Zornberg, Jorge G.
    2018-05-01 | PDF
    soil-geosynthetic composite (KSGC) for a wide range of geosynthetics. The tests were conducted after establishment of test configurations that were found suitable for specification of geosynthetic-stabilized base roadways. Field performance of experimental test sections that were constructed using the same geosynthetics as those tested in the exper ...
  • GDOT Local Beneficiary Analysis of TIA Project Expenditures Phase II Impact Evaluation
    GDOT Local Beneficiary Analysis of TIA Project Expenditures, Phase II : Impact Evaluation
    Boston, Thomas D. ;
    Ross, Catherine L.
    2018-05-01 | PDF
    In 2012, voters in three regions of Georgia—Central Savannah River Area, Heart of Georgia Altamaha, and River Valley—approved the Transportation Investment Act (TIA) referendum, which added 1% to local sales taxes. Seventy-five percent of the additional tax revenues support transportation projects that voters in the three regions approved; the rema ...
  • Nontraditional Fog Seal for Asphalt Pavement Performance on Shoulder Sections in Minnesota
    Nontraditional Fog Seal for Asphalt Pavement : Performance on Shoulder Sections in Minnesota
    Johnson, Eddie N.
    2018-05-01 | PDF
    The pavement engineering community has recently been introduced to a number of nontraditional products intended for uses as surface sealers for bituminous pavements. Many new products use agricultural-based components and little is known regarding their effect on bituminous pavement performance. Several nontraditional and “bio-based” fog sealants w ...
  • Evaluation of 3D Laser Scanning Equipment 2018 Final Report
    Evaluation of 3-D Laser Scanning Equipment : 2018 Final Report
    Renshaw, Greg ;
    Meister, James F.
    2018-05-01 | PDF
    As a follow-up to ICT Project R27-030, Evaluation of 3-D Laser Scanning, this report provides findings of an evaluation of 3-D laser scanning equipment to determine the tangible costs versus benefits and the manpower savings realized by using the equipment in place of or in conjunction with conventional surveying methods. The Trimble TX5 laser scan ...
  • Why TNCs Will Be Regulated Like TaxisHistorically Speaking
    Why TNCs Will Be Regulated Like Taxis–Historically Speaking
    Mundy, Ray A.
    2018-05-01 | PDF
    With the advent of transportation network companies, or TNCs, as they are labeled by the state of California, there has been considerable discussion, legislative action, and lawsuits regarding their attempts to operate without being subject to local taxi, sedan, limousine, or private-for-hire regulations. Indeed, across almost every continent, Uber ...
  • Identifying CostEffective HighReturn and Quickly Implementable Improvements To Address Freight Congestion and Mobility Constraints in Tennessee
    Identifying Cost-Effective, High-Return, and Quickly Implementable Improvements To Address Freight Congestion and Mobility Constraints in Tennessee
    Mishra, Sabya ;
    Golias, Mihalis M.
    2018-05-01 | PDF
    This study compares four multidimensional resource allocation models to prioritize freight improvement projects for regional, state, and local transportation agencies to maximize return on investment. The proposed models are based on economic competitiveness with and without mutual exclusiveness in location, and equity in opportunity and outcome. M ...
  • Evaluation of Repair Techniques for ImpactDamaged Prestressed Beams
    Evaluation of Repair Techniques for Impact-Damaged Prestressed Beams
    Gangi, Michael ;
    Jones, Mark
    2018-05-01 | PDF
    Collisions between over-height vehicles and bridges occur about 1,000 times per year in the United States. Collision damage to bridges can range from minor to catastrophic, potentially requiring repair or replacement of a bridge beam. For prestressed concrete beams, the traditional repair methods are prestressed strand splices and fiber-reinforced ...
  • Development of Rural Road Bridge WeighinMotion System to Assess Weight and Configuration of FarmtoMarket Vehicles
    Development of Rural Road Bridge Weigh-in-Motion System to Assess Weight and Configuration of Farm-to-Market Vehicles
    Dahlberg, Justin ;
    Lu, Ping
    2018-05-01 | PDF
    The weights and configurations of large vehicles traveling the primary interstate system are known with relative certainty due to the information collected at numerous weigh stations. It is uncommon, however, that farm-to-market vehicles and other implements of husbandry (IoH) travel the interstate system; thus, an accurate assessment of the charac ...
  • Inservice Performance Evaluation of Median Cable Barriers in Iowa
    In-service Performance Evaluation of Median Cable Barriers in Iowa
    Savolainen, Peter T. ;
    Kirsch, Trevor J.
    2018-05-01 | PDF
    Median crossover crashes occur when errant vehicles depart from their intended lane of travel on divided roadways and traverse the median, ultimately striking a fixed roadside object or vehicle traveling in the opposite direction. These crash types are commonly associated with high-severity injuries due to the increased travel speeds and sharp impa ...
  • TR 693 Development of Quality Standards for Inclusion of High Recycled Asphalt Pavement Content in Asphalt Mixtures Phase III
    TR 693: Development of Quality Standards for Inclusion of High Recycled Asphalt Pavement Content in Asphalt Mixtures, Phase III
    Lee, Hosin “David” ;
    Mokhtari, Ali
    2018-05-01 | PDF
    Federal, state and local public agencies encourage the use of recycled asphalt pavement (RAP) in constructing pavements to the maximum extent possible with an equal performance. According to the recent NAPA’s report, average percent used in asphalt pavement was 21% based on total reported tons of RAP divided by reported total tons asphalt mixtures ...
    Supporting Files
  • Training Video for the Implementation of LiquidOnly Plow Routes
    Training Video for the Implementation of Liquid-Only Plow Routes
    Porter, Luke W
    2018-05-01 | PDF
    Liquid-only plowing is a method of removing snow and ice on the road by applying liquid chemicals directly to the roadway surface. It also serves as an anti-icing tool. The goal of the Liquid-Only Plow Routes project was to create a set of training and promotional tools for the implementation of liquid-only roadway treatments. This information can ...
  • Strategic Planning for Connected and Automated Vehicles In Massachusetts
    Strategic Planning for Connected and Automated Vehicles In Massachusetts
    Gartner, Nathan ;
    Xie, Yuanchang
    2018-05-01 | PDF
    Connected and Automated Vehicle (CAV) technologies are evolving at a fast pace, and new developments are occurring on a daily basis. These technologies have potential to significantly change transportation and travel, to make them safer, more accessible, and more efficient than they are today. There are many issues that will have to be investigated ...
  • Improving TxDOTs Culvert Load Rating Process and Software
    Improving TxDOT's Culvert Load Rating Process and Software
    Lawson, William D. ;
    Surles, James G.
    2018-05-01 | PDF
    This report presents findings of the 2016-17 TxDOT culvert load rating research study. The study focused on three basic goals: (1) evaluate a series of usability-based load-rating enhancements for application to TxDOT’s pre-1980, on-system, bridge-class, cast-in-place, reinforced concrete box culverts, (2) update TxDOT’s Culvert Rating Guide, and ( ...
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