The Illinois Department of Transportation (IDOT) began conducting pavement performance monitoring surveys on mechanistic-empirical designed pavements in 1986. These surveys and analyses provide the necessary data to verify and validate the design procedures and life-cycle cost models used in the pavement selection process. The pavement distress sur
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This research evaluated the fire test and primary closure test procedures outlined in the draft United Nations Economic Council for Europe Global Technical Regulation GTR No. 13 and the revised NHTSA test methods, as opposed to examining individual specimens. This report is divided into two parts: Part 1 covers the fire tests where two series of te
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A new Ku‑band antenna system has been developed to support passive positioning and navigation (PPN) using Ku‑band signals of opportunity (SoOP) transmitted by low Earth orbit (LEO) satellites. The compact seven‑element antenna is low‑cost and easy to fabricate. Its radiation pattern is optimized to provide stable signal‑to‑noise ratio (SNR) across
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We have addressed attacks on information freshness using a model with application to cooperative autonomous routing networks. In this model, each user monitors the status of each other user in the network, where the statuses are communicated using beacon transmissions over a shared channel. We consider an adversarial attack where a portion of the b
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Repairs to underwater bridge elements have been successfully completed for many years. However, the increased age of the Nation’s bridges and related structures, as well as the increased emphasis in regular underwater inspection since the revisions to the National Bridge Inspection Standards in 1988, indicates an increased need to perform repairs t
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We present SENTRY-X, a Trusted Execution Environment (TEE)-assisted protocol for vehicle-to-everything (V2X) communication that reconciles the tension between strict default anonymity and authorized traceability. Unlike traditional approaches that rely on centralized authorities for key distribution, which introduces latency and single points of fa
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Vehicle-to-Everything (V2X) communication underpins Highly Automated Transportation Systems (HATS), yet scalability is constrained by three coupled challenges: (i) authentication overhead in latency-sensitive communication, (ii) mobility-aware computation offloading under dynamic wireless and infrastructure conditions, and (iii) safety-critical dec
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Resilient modulus (RM) is an important property of subgrade soils that accounts for repetitive loads due to vehicular traffic. Since AASHTO recommended its use in pavement design in 1986, various transportation agencies have devised procedures for testing and evaluation Of RM. A comprehensive literature search was conducted in this study with two o
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Expert systems are "intelligent" computer programs which have the capabilities of reasoning, learning, and simulating human sensory capabilities. Solutions to many problems in transportation engineering which are not well structured as well as those which do not have an explicit numerical algorithmic solution, can benefit from using expert systems.
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The information contained within this report addresses: (1) Research -- involving the use of herbicides and plant growth regulators for roadside vegetation management; (2) Maintenance -- implementing research results into an operational phase of the Oklahoma Department of Transportation (ODOT) maintenance program; and (3) Training -- conducting pes
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Sections of Interstate 35 in Noble and Logan Counties of Oklahoma were recently reconstructed. The reconstruction involved replacing the existing pavement with continuously reinforced concrete pavement. On both projects, northbound lanes were reinforced with epoxy-coated steel and southbound lanes were reinforced with uncoated steel. This side-by-s
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During the past 20 years, the Oklahoma Department of Transportation (ODOT) has constructed over 450 lane miles of Continuously Reinforced Concrete Pavement (CRCP) on its interstate and U.S. highway system. Throughout that time, few changes have been made to the original CRCP design.
Transverse cracking of asphalt pavements is a costly pavement distress occurring in states that experience cold/freezing temperatures during the winter months. The cracks are caused by low temperature-induced tensile stresses that exceed the tensile strength of the pavement material. The majority of these cracks occur in the transverse direction re
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Transportation insecurity (TI)— a condition in which one is unable to regularly move from place to place in a safe or timely manner because one lacks the material, economic, or social resources necessary for transportation—remains a persistent barrier to economic opportunity and quality of life in the United States. While the Transportation Securit
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This publication constitutes a listing of experimental products and equipment that are being considered or evaluated by the Oklahoma Department of Transportation, other transportation departments, or other agencies. The listing is continuously update updated as new information is received.
Wildlife-vehicle collisions (WVCs) pose serious risks to motorist safety and contribute significantly to wildlife mortality. Wildlife fencing serves as a proven countermeasure to mitigate WVCs while promoting habitat connectivity. This study evaluates the safety effectiveness of wildlife fencing installed across Utah from 2011 to 2023, using traffi
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This is the final evaluation report on the dynamic compaction project that was completed in 1985 on an abandoned strip mine and landfill. Since that time, the area has been monitored with instrumentation for lateral movement and horizontal settlement.
United States. Department of Transportation. Federal Highway Administration. Office of Planning, Environment, and Realty
2024-06-06
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ZIP
The Database for Air Quality and Noise Analysis (DANA) is a tool created by the Federal Highway Administration (FHWA) to process historical traffic data. The tool combines traffic data from existing data sources into a single database. It then processes the combined data into properly formatted inputs for EPA's Motor Vehicle Emission Simulator (MOV
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United States. Department of Transportation. Federal Highway Administration. Office of Planning, Environment, and Realty
2022-10-13
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ZIP
The Database for Air Quality and Noise Analysis (DANA) is a tool created by the Federal Highway Administration (FHWA) to process historical traffic data. The tool combines traffic data from existing data sources into a single database. It then processes the combined data into properly formatted inputs for EPA's Motor Vehicle Emission Simulator (MOV
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United States Department of Transportation
Lin, Zhiqiang