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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 2541 - 2560 of 36873 results
  • Evaluate and Develop PostConstruction Groundcover That Meets Erosion and Sediment Goals and Is Beneficial to Pollinators Fact Sheet
    Evaluate and Develop Post-Construction Groundcover That Meets Erosion and Sediment Goals and Is Beneficial to Pollinators [Fact Sheet]
    Burns, Ana ;
    Daniels, Cheryl
    2023-03-01 | PDF
    The Ohio Department of Transportation (ODOT) is constantly looking for ways to reduce maintenance costs following construction using native seed mixes while ensuring all Stormwater Pollution Prevention Plan (SWPPP) requirements are met. Davey Resource Group “DRG” was contracted by ODOT to develop seed mixes for various habitats and research appropr ...
  • Evaluation of Coefficients Related to Runoff from Roadway Projects Technical Brief
    Evaluation of Coefficients Related to Runoff from Roadway Projects [Technical Brief]
    Guo, Qizhong (George) ;
    Miskewitz, Robert
    2023-03-01 | PDF
    The objective of this research project was to develop new curve numbers for four land treatments, bare soil, gravel, vegetation, and porous HMA, on top of subsoils with a series of hydraulic conductivities, typical of NJDOT highway projects.
  • UHPC Decked Ibeam for Accelerated Bridge Construction
    UHPC Decked I-beam for Accelerated Bridge Construction
    Morcous, George ;
    Tadros, Maher K.
    2023-03-01 | PDF
    Ultra-High-Performance Concrete (UHPC) is an excellent material for bridge construction due to its exceptional durability and superior mechanical properties. Several Departments of Transportations (DOTs), including NDOT, have limited the use of UHPC in bridge construction to joints and connections between bridge components due to the relatively hig ...
  • Ecological Design Rules for Roadway Lighting
    Ecological Design Rules for Roadway Lighting
    Sulliván, Mažeika Patricio ;
    Gray, Suzanne M
    2023-03-01 | PDF
    Artificial lighting at night alters natural patterns of light and dark in ecosystems and includes chronic or periodic illumination, unexpected changes in lighting, and direct glare that can have serious implications for ecological systems, such that it is increasingly referred to as “ecological light pollution”. ALAN occurs at an extent and magnitu ...
  • Statewide Capital Investment Strategy and Update Technical Brief
    Statewide Capital Investment Strategy and Update [Technical Brief]
    Patel, Alpesh ;
    Ukpah, Priscilla
    2023-03-01 | PDF
    The goal of this research is to complete the following objectives: • Inventory relevant transportation investment plans for New Jersey, including capital programs for NJDOT, NJ TRANSIT, NJTA and SJTA. • Coordinate amongst all SCIS stakeholders, including key collaborators at NJDOT, NJTA, SJTA and NJ Transit. • Draft an SCIS document that meets all ...
  • Alternative Transit Approaches for Rural Communities
    Alternative Transit Approaches for Rural Communities
    Fisher, Thomas
    2023-03-01 | PDF
    Innovative or nontraditional transportation programs and platforms have emerged for rural communities, largely fueled by digital technology. Public-private partnerships, car- or bike-shar?ing, and other local networks offer promising solutions to meet rural transit needs more equitably and efficiently. In addition to benefiting underserved populati ...
  • Performance of Concrete Overlays over Full Depth Reclamation
    Performance of Concrete Overlays over Full Depth Reclamation
    King, Daniel ;
    Akakin, Tumer
    2023-03-01 | PDF
    Concrete overlays of full depth reclamation (FDR) are a pavement rehabilitation option involving reclamation of existing pavement layers while providing a new concrete surface to the roadway. This report reviewed nine concrete overlays of FDR that have been constructed in three states since 2006. Design and construction details were collected for e ...
  • Annulus Void Fill Material for Rehabilitated Sliplined Culverts
    Annulus Void Fill Material for Rehabilitated Sliplined Culverts
    Patnaik, Anil ;
    Alzlfawi, Abdullah
    2023-03-01 | PDF
    Sliplining is a method used by transportation agencies to rehabilitate deteriorated culverts. In recent years, ODOT discovered a number of sliplined culverts that did not have their annulus void spaces completely filled. Such culverts experience distortion and settlement as well as reduced structural capacity. Field inspections of several sliplined ...
  • Evaluate Replacement of Current PostConstruction Groundcover with Pollinator Beneficial Groundcover
    Evaluate Replacement of Current Post-Construction Groundcover with Pollinator Beneficial Groundcover
    Burns, Ana ;
    Daniels, Cheryl
    2023-03-01 | PDF
    The Ohio Department of Transportation (ODOT) is constantly looking for ways to reduce maintenance costs following construction using native seed mixes while ensuring all Stormwater Pollution Prevention Plan (SWPPP) requirements are met. Davey Resource Group “DRG” was contracted by ODOT to develop seed mixes for various habitats and research appropr ...
  • Evaluation of Coefficient Related to Runoff from Roadway Projects
    Evaluation of Coefficient Related to Runoff from Roadway Projects
    Guo, Qizhong (George) ;
    Miskewitz, Robert
    2023-03-01 | PDF
    New Jersey Department of Transportation (NJDOT) is required to quantify and mitigate the stormwater impacts of certain roadway projects. Acceptable runoff calculation methods include the Natural Resources Conservation Service Method and the Rational Method. Existing coefficients are often insufficient for representing land treatments utilized in ro ...
  • MultiCity Study of an Engineering and Outreach Program to Increase Driver Yielding at Signalized and Unsignalized Crosswalks
    Multi-City Study of an Engineering and Outreach Program to Increase Driver Yielding at Signalized and Unsignalized Crosswalks
    Morris, N L ;
    Craig, C M
    2023-03-01 | PDF
    Pedestrian deaths are at a 30-year high nationally, accounting for 16% of total deaths in 2018 and far exceeding the previous decade of 12%, a trend mirrored in Minnesota. Previous research found an increase in local and citywide yielding at unsignalized crosswalks following an engineering and high-visibility enforcement program in Saint Paul, Minn ...
  • District Highway Maintenance Research OnCall ROC 202309 Task 1 Evaluation of New Methods for Improving Crack Sealing Process Fact Sheet
    District Highway Maintenance Research On-Call (ROC) 2023–09. Task 1, Evaluation of New Methods for Improving Crack Sealing Process [Fact Sheet]
    Nazzal, Munir D
    2023-03-01 | PDF
    Although crack sealing is one of the common tasks that maintenance crews at ODOT county garages frequently conduct, it can often be challenging as it is weather-dependent, slow-paced, and labor intensive. In addition, frequent breakdowns of equipment can cause significant downtimes. Crack sealing maintenance crews are also exposed to many hazards i ...
  • The 2021 National Survey of the Use of Booster Seats
    The 2021 National Survey of the Use of Booster Seats
    Boyle, Lacey L
    2023-03-01 | PDF
    This technical report presents results from the 2021 National Survey of the Use of Booster Seats (NSUBS), the only probability-based nationwide child restraint use survey in the United States that observes restraint use and interviews an adult occupant to collect age, gender, height, weight, race, ethnicity, and other data. NHTSA’s National Center ...
  • Engineered Log Jam Monitoring Along NH Route 16 in Errol New Hampshire
    Engineered Log Jam Monitoring Along NH Route 16 in Errol, New Hampshire
    Ballestero, Thomas P. ;
    Ballestero, Joel C
    2023-03-01 | PDF
    Many roads and highways exist close to streams that exhibit lateral instability (bank erosion). Conventional practices are to armor such locations, and these solutions are expensive, do not provide ecosystem value, and result in high mitigation fees. Natural channel design structures, such as engineered log jams, offer a greener, less expensive alt ...
  • Design and Evaluation of Transition for TxDOT MASH Test Level 4 TL4 Guardrail System
    Design and Evaluation of Transition for TxDOT MASH Test Level 4 (TL-4) Guardrail System
    Sheikh, Nauman M. ;
    Bligh, Roger P.
    2023-03-01 | PDF
    Researchers at the Texas A&M Transportation Institute (TTI) designed and tested a Manual for Assessing Safety Hardware (MASH) Test Level 3 (TL-3) compliant guardrail transition system (hereafter referred to as Transition) that enables transitioning and terminating the ends of the Texas Department of Transportation MASH TL-4 guardrail system with MA ...
  • LiDAR for Geotechnical Applications Project Capsule
    LiDAR for Geotechnical Applications [Project Capsule]
    Gautreau, Gavin
    2023-03-01 | PDF
    The research intends to focus on four objectives regarding LiDAR within Louisiana Department of Transportation (DOTD) for geotechnical applications: (1) Site investigation and reconnaissance for drilling operations. LiDAR scans identifying slopes and feasible areas for drilling access could save time and efforts, possibly reducing site visits. (2) ...
  • Parametric Analysis of Telecommuting Effects on Transportation Tax Revenues
    Parametric Analysis of Telecommuting Effects on Transportation Tax Revenues
    Shokouhian, Mehdi ;
    Schonfeld, Paul
    2023-02-28 | PDF
    This study explores the effects of increases in online activities (such as telecommuting and online shopping) as well as shifts toward electric vehicles on transportation revenues for the District of Columbia (DC). The analysis is based on (1) a review of the literature and state of practice regarding online activities, trends in vehicle fleet mix, ...
  • Postfire Damage Inspection of Concrete Structures Phase II
    Post-fire Damage Inspection of Concrete Structures – Phase II
    Viglas, James ;
    Vitalis, Thomas
    2023-02-28 | PDF
    In general, tunnels are designed with an abundance of safety regarding structural integrity, however, there can be uncertainty related to structural performance after a fire event. The residual condition of a tunnel after a fire is dependent on fire intensity and duration. The goal of this study is to correlate visual and material characteristics o ...
  • OffSystem Public Roads Annual Average Daily Traffic AADT Estimation Study
    Off-System Public Roads Annual Average Daily Traffic (AADT) Estimation Study
    Hylton, Peter ;
    Miller, Bryce C
    2023-02-28 | PDF
    This report describes a process to estimate AADT on non-Federal-Aid public roads (collectively called “off-system” roads) in Idaho. This will provide additional data for ITD and regional and local transportation agencies to conduct analysis, and it will meet new federal requirements for estimating AADT on all public roads. The report includes a rev ...
  • Testing and Analysis of the Effects of Contamination of Friction Pendulum Bearings
    Testing and Analysis of the Effects of Contamination of Friction Pendulum Bearings
    Alvarado, Rolando Grijalva ;
    Ryan, Keri L.
    2023-02-17 | PDF
    Field contamination of friction pendulum system (FPS) isolation bearings (water, ice, dirt and other debris) has been observed in several Alaskan bridges during routine bridge inspections. Characterization testing was performed on four FPS bearings in clean/dry conditions as well as wet, frozen and soil-filled. Three of the four were double pendulu ...
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