The Autonomous Truck Mounted Attenuator (ATMA) system represents a specialized application of connected and autonomous vehicle (CAV) technologies, designed to enhance worker safety during roadway maintenance operations. Despite its growing adoption across state agencies, formalized deployment criteria remain absent from national guidelines such as
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The purpose of this study was to determine the immediate scour of un-weathered claystone bedrock in bridge configurations, i.e., around piers and/or constricted flow. This study evaluated the erodibility of un-weathered claystone found in the Colorado Front Range with the SRICOS-EFA (Scour Rate in Cohesive Soils – Erosion Function Apparatus) method
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The leading cause of bridge failure globally is scour. Scour occurs when water flowing beneath a bridge excavates and carries away portions of the streambed. Traditional scour prediction methodologies were designed for course-grained or “cohesionless” materials. Different scour mechanisms exist for course-grained and fine-grained materials. This st
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This study aims to identify point and shape rheological parameters that can effectively differentiate between high and low-quality asphalt binders, particularly in their resistance to intermediate-temperature cracking, regardless of binder source or formulation changes. Point parameters assess binder hardness, while shape parameters describe the bi
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Bridge scour is a leading cause of hydraulic-related bridge failures, yet current monitoring practices rely on periodic inspections that are insufficient during floods when scour activity accelerates. To address this gap, a low-cost (under $1,000 per unit) remote scour-monitoring system was developed and deployed on two scour critical bridges in Ge
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Road weather systems collect, analyze, and share weather information to help mitigate the disruptive impact of weather events on the nation’s surface transportation system. Much research and development has been undertaken to advance road weather management practice. Meanwhile, many state and local efforts have aimed to deploy connected vehicle (CV
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Oklahoma. Department of Transportation. Research & Development Division
2002-02-01
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This publication consists of a listing of experimental products that are being or have been evaluated by The Oklahoma Department of Transportation (ODOT), or other transportation agencies. This listing is continuously updated as new information is received. A status of the evaluation is given for each item, showing the progress or result of the eva
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This study reports on the potential application of Intelligent Transportation Systems (ITS) in Oklahoma using advanced sensor computer, electronics, and communications technologies and management strategies. The study first discusses national initiatives, funding ITS strategic plans in other states, and general benefits of ITS. This is followed by
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A field demonstration project was undertaken by the Oklahoma Department of Transportation to investigate the performance of an asphalt overlay constructed using recycled asphalt millings and the cold mixed, cold laid system. A 1.9-km (1.2-mi) section of the US-64 North frontage road in Pawnee County was rehabilitated with a 5-cm (2-in.) thick overl
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In September 1999, Bridges "A" and "B" of contract TBOI-0035-1(110)044 were overlaid with a silica fume concrete surface. ODOT has been exploring ways to stop or slow chloride-induced corrosion of uncoated reinforcing steel in bridge decks. Silica fume concrete additive has demonstrated success in reducing chloride intrusion. After one year of test
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This publication consists of a listing of experimental products that are being or have been evaluated by The Oklahoma Department of Transportation (ODOT) or other transportation agencies. This listing is continuously updated as new information is received. A status of the evaluation is given for each item, showing the progress or result of the eval
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Adverse weather conditions present significant risks to motorists, making safe navigation challenging. Artificial intelligence (AI) advancements have facilitated the development of intelligent systems to address these concerns. This project introduces Conversational AI for Road Weather Information Systems (CARWIS), an AI-powered solution that provi
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In recent decades, emerging technologies have significantly transformed the transportation sector, offering a wider range of vehicle options and mobility alternatives. However, the recent COVID-19 pandemic disrupted many aspects of daily life, likely leaving long-lasting effects that further complicate our understanding and prediction of individual
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Project No. 2150 develops a methodology for determining the impact of highway bypasses on small town business districts in Oklahoma. The focus is predicting likely impacts of proposed bypasses on US 70. Economic impacts are measured by comparing changes in the sales tax base in the bypassed cities with those of in similar non-bypassed cities. Quasi
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An event data recorder records vehicle data just prior or during a crash (braking, air bag status and deployment, seat belt usage, etc., and then crash events), intended for retrieval after the crash to help crash reconstruction or vehicle safety research. NHTSA established CDR requirements in 49 C.F.R. § 563 in 2012. Since then, crash avoidance an
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The use of actual axle load distributions instead of summary statistics, such as equivalent single-axle loads (ESALs), in the forthcoming Mechanistic-Empirical (M-E) Pavement Design Guide will allow the assessment of the consequences of specific loading configurations on pavement performance. For example, the damaging effects of increased axle load
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Traffic volume influences the geometric requirements of a highway; however, it is only the axle loads of heavy commercial traffic that affect the structural design of pavements. Mechanistic-based pavement design approaches, coupled with faster computers, are changing the way in which traffic loads are accounted for in pavement design. In the M-E De
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Variable speed limits (VSL) are useful in promoting highway safety. According to the Federal Highway Administration (FHWA), “the use of VSLs during inclement weather or other less than ideal conditions can improve safety by decreasing the risks associated with traveling at speeds that are higher than appropriate for the conditions.” The project’s r
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This report documents a cooperative effort to gather and make available information about flexible pavement forensics methods and the valuable knowledge that has resulted from forensic studies of flexible pavements over the past several decades in Texas. The gathered information is provided to the Texas Department of Transportation (TxDOT) for plac
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This report summarizes cooperative efforts to gather and make available in a knowledge management system both tacit and currently documented knowledge of rigid pavement forensic methods, tools, and the valuable insights into rigid pavement performance principles and practices gained during forensic studies over several decades. Tacit knowledge was
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