This report presents the results of the third phase of an on-going FHWA study on weather integration in Transportation Management Center (TMC) operations. The report briefly describes the earlier phases of the integration study, summarizes the findings from the implementation and evaluation of an automated weather alert notification system in the S
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Highway work-zone safety is a major concern for government agencies, the legislature, and the traveling public. Several work zone intelligent transportation systems (WZITS) have been developed as a safety countermeasure to warn drivers of dangerous traffic conditions. Unfortunately, the effectiveness of a WZTIS is diminished if the actual traffic f
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United States. Joint Program Office for Intelligent Transportation Systems
2011-01-01
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Connected vehicles have the potential to transform the way Americans travel through the creation of a safe,interoperable wireless communications network that links cars, buses, trucks, trains, transportation infrastructure,and personal mobile devices. Connected vehicle applications provide connectivity between andamong vehicles, infrastructure, and
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United States. Joint Program Office for Intelligent Transportation Systems
2011-01-01
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Connected vehicles have the potential to transform the way Americans travel through the creationof a safe, interoperable wireless communications network—a system that includes cars, buses,trucks, trains, traffic signals, cell phones, and other devices. In the past, the U.S. Department ofTransportation (U.S. DOT) has focused on helping people surviv
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John A. Volpe National Transportation Systems Center (U.S.)
2011-01-01
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This document identifies and explains each Eco-Logical signatory agency's strategic environmental programs, projects, and efforts that are either directly related to or share the vision set forth in Eco-Logical. A brief description of an agency's key program includes program activities and goals, contact information, and a list of other strategic i
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The Clarus Initiative, a joint effort of the U.S. Department of Transportation Intelligent Transportation Systems (ITS) Joint Program Office and FHWA’s Road Weather Management Program (RWMP), is a six-year effort to develop and demonstrate an integrated weather observation data management system that can reduce the impact of adverse weather conditi
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United States. Department of Transportation. Road Weather Management
2011-01-01
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This document summarizes results from the Road Weather Policy Forum held November 8-9, 2010 in Washington, D.C. The agenda outlines a research framework, broad research needs, and the various roles and responsibilities of several stakeholder sectors.
Minnesota UPA projects focus on reducing traffic congestion in the I-35W corridor and in downtown Minneapolis. ITS technologies underlie many of the Minnesota UPA projects, including those centered on tolling, real-time traffic and transit information, transit signal priority,and guidance technologies for shoulder-running buses.
United States. Department of Transportation. Federal Highway Administration. Office of Safety
2011-01-01
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This case study discusses the use of SafetyAnalyst, a software tool designed to implement analysis methods, with Highway Safety Manual (HSM) Part B- Roadway Safety Management Process, Chapters 4 through 9. SafetyAnalyst contains tools to perform Network Screening, Diagnosis, Countermeasure Selection, Economic Appraisal, Priority Ranking, and Counte
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
2011-01-01
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This case study discusses how the Florida Department of Transportation (FDOT) has used the Highway Safety Manual (HSM) as part of their Plans Preparation Manual (PPM) criteria, used when planning highway projects. With the recent publication of the HSM, FDOT initiated a pilot project to investigate the differences in project cost based on FDOT PPM
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United States. Department of Transportation. Road Weather Management
2011-01-01
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Good drivers know what is happening in and around their vehicles, but today they are not alone in sensing the roadway environment. Right now, many vehicles collect information on vehicle conditions (lights, wipers, etc.), ambient temperature, and atmospheric pressure. Research is currently underway to take this information and combine it with other
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United States. Department of Transportation. Road Weather Management
2011-01-01
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“Weather forecast for tonight: Dark. Continued dark overnight, with widely scattered light by morning.” These words by comedian George Carlin, while not a real weather forecast, demonstrate how insufficient forecasting can be. While the accuracy of weather forecasting has improved substantially over the last few years, when it comes to the nation’s
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United States. Department of Transportation. Road Weather Management
2011-01-01
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Weather affects almost all maintenance activity decisions. The Federal Highway Administration (FHWA) tested a new decision support system for maintenance in Iowa, Indiana, and Illinois called the Maintenance and Operations Decision Support System (MODSS). MODSS can dramatically improve how an agency schedules its maintenance activities based on rea
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United States. Department of Transportation. Road Weather Management
2011-01-01
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The quality of road weather forecasts has major impacts on users of surface transportation systems and managers of those systems. Improving the quality involves the ability to provide accurate, route-specific road weather information (e.g., timing and type of precipitation, pavement temperature, likelihood of blowing snow).
United States. Department of Transportation. Road Weather Management
2011-01-01
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State transportation agencies have wanted to improve the techniques that lead to the decisions to impose and subsequently lift restrictions on selected roads that are prone to road damage due to subsurface freezing/thawing processes. The Seasonal Load Restriction (SLR) Tool uses observations from the Clarus and other non-Clarus systems to generate
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The safety edge is an innovative treatment intended to minimize drop-off-related crashes. With this treatment, the pavement edge is sloped at a 30-degree angle (see figure 1). This angle makes it easier for a driver to safely reenter the roadway after inadvertently driving onto the shoulder.
United States. Department of Transportation. Road Weather Management
2011-01-01
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Statewide transportation information systems need road weather and road condition forecasts to improve safety and mobility for transportation users. Under the Clarus Initiative’s regional demonstrations enhanced road weather content was developed for traveler advisories that combined observed and forecasted weather and road conditions into a multis
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United States. Department of Transportation. Road Weather Management
2011-01-01
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The Federal Highway Administration (FHWA) recently tested a Multistate Control Strategy Tool that integrates weather and other traffic information enabling system operators to better manage the transportation network. This tool allows multple agencies to better coordinate and respond to real-time situations, and disseminate safety an other informat
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This memorandum focuses on the use of climate information when performing a vulnerability assessment, a topic that was discussed at the Newark Pilot Peer Exchange Workshop on May 4-5, 2011. The memorandum describes several sources of climate information, and provides some recommendations on how this information can be used by the pilots (or other t
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