The Transit Reliability Improvement and Performance (TRIPS) Stage 1 Data Set contains reports and prototype travel time data generated as the first phase of the TRIPS project. Reports such as the Final Implementation Report, which includes the SEMP, ConOps, and the travel time data from proof-of-concept/protype Route 57. The SEMP defines how the Ce
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This document provides a rationale for the expected operations of a centralized Transit Signal Priority (TSP) system deployment along various corridors within Santa Clara County. It documents the outcome of stakeholder discussions and consensus building that has been undertaken to ensure the system implemented is operationally feasible and has stak
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Assessing the load-carrying capacity of aging steel truss railroad bridges is challenging, due to significant uncertainties in material properties, deterioration, and support conditions. This study presents a comprehensive methodology for efficient, cost-effective load rating of critical bridge members through high-fidelity computational modeling,
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The datasets contain reports and protype travel time data that were generated as the first phase of the TRIPS project. Reports such as Final Implementation Report, that includes the SEMP, ConOps, and the travel time data from proof-of-concept/protype Route 57. The SEMP defines how the Centralized Transit Signal Priority (TSP) system will be planned
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The Final Implementation Report illustrates how the proof of concept or prototype performed relative to expectations and evaluates whether a full-scale implementation of the CTSP would meet the SMART Program’s goals. The report includes the System Engineering Management Plan that includes the Draft Verification Plan, Draft Memorandum of Understandi
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Railroad ballast plays a critical role in distributing train loads, maintaining track stability, and ensuring proper drainage. Over time, intrusion of fines and moisture leads to ballast fouling, which can compromise track structural integrity and service life. Early detection of ballast fouling is therefore essential for effective maintenance and
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Bridge inspection is a vital component of any bridge management strategy of a state DOT. Significant funds are allocated to keeping the over 600,000 bridges in the U.S. safe. A routine bridge inspection is the most common type of inspection and is often performed from deck, ground or water levels or from permanent access structures, if available. V
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The Rhode Island Department of Transportation (RIDOT) has a significant inventory of state-owned roads of which layer thickness and moisture related damage is uncertain. Discrete methods of assessment like coring and visual inspection provide limited data and are both time-consuming and costly in terms of traffic control and personnel. The objectiv
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In this project, we develop non-contact sensing mechanism for health monitoring as well as the associated machine-learning based technique for decision making. Currently available sensory systems for structural health monitoring are almost all based on transducers that are directly attached to or embedded in structures monitored. As a result, they
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Among all traffic collisions, lane departure crashes are the leading type of serious traffic crashes in Maine, comprising 73% of statewide traffic fatalities. To reduce these crashes, the Maine Department of Transportation (MaineDOT) installed shoulder and centerline rumble strips on roadways to prevent lane departure crashes. Specifically, 511 mil
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The aero gas turbine industry has collaborated with the Federal Aviation Administration (FAA) to study and provide guidance regarding the inspection process for the subsurface volume of critical nickel-based engine hardware, through the Aerospace Industries Association (AIA) team AIA A-18-003. Data from across a broad spectrum in the industry is ne
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The aero gas turbine industry has collaborated with the Federal Aviation Administration (FAA) to study and provide guidance and make recommendations about the implementation of requirements for in-service, sub-surface inspections through the Aerospace Industries Association (AIA) team AIA A-18-004. Data from across a broad spectrum in the industry
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The objective of this implementation project was to prepare procurement specifications and purchase three Hamburg Wheel-Track Devices (HWTDs), install them in two different Texas Department of Transportation (TxDOT) laboratories, and provide training to assist the technicians in proper procedures for testing and data analysis. The implementation pr
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This report presents the results of Phase II of the project, "Framework and Methodology for Risk-based Bridge and Tunnel Asset Management". The research was carried out at Portland State University in collaboration with engineers and officials at the Oregon Department of Transportation (ODOT) and Federal Highway Administration (FHWA). Using the fra
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Many railway bridges in New England were designed and constructed over a century ago, using now-outdated design codes and materials, making them susceptible to damage under modern service loads. These aging structures and their critical members such as eye-bars, pins, and gusset plates, are showing signs of deterioration, including corrosion, fatig
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The Michigan Department of Transportation (MDOT) identified significant deterioration at the ends of steel and prestressed concrete (PSC) beams, requiring systematic evaluation and improved decision-making protocols for Requests for Action (RFAs). This comprehensive study examined 431 steel beam ends and 267 PSC bridges to develop capacity-based as
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This report outlines the results of a comprehensive study focused on enhancing maintenance and inspection practices for mechanically stabilized earth (MSE) walls. The project was sponsored by the Arkansas Department of Transportation (ARDOT), and its central objectives were to formulate the best management practices for MSE wall maintenance and dev
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Intersection sight distance (ISD) requirements are intended to enhance safety by ensuring visibility at intersections. However, in dense urban areas, these requirements can preclude elements of the urban streetscape, such as street trees, on-street parking, and transit infrastructure, and can restrict compact mixed-use developments, such as traditi
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Improving the diversity of roadside plantings can provide an array of benefits including improved aesthetics, improved driver safety, and increased biodiversity. However, establishing landscape plants along roadsides can often be difficult due to a variety of soil related and other environmental factors. In an earlier trial, researchers from Michig
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United States. Federal Highway Administration. Office of Bridges and Structures
2025-03-05
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ZIP
HY-8 automates culvert hydraulic computations utilizing a number of essential features that make culvert analysis and design easier. An HY-8 User Manual is included with the software installation (access via 'Help' button on top toolbar) to provide important information on the technical features, capabilities, and limitations of the software.Improv
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United States Department of Transportation
Tripathi, Sachin