The Rolling Wheel Deflectometer (RWD), which measures pavement surface deflection at traffic speed, offers the potential to characterize the structural conditions of the road network without major delays and in a cost...
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Illinois is preparing to deploy 511. This paper discusses the concept determined to best meet the needs and capabilities of the Illinois DOT (IDOT) and our partners through a statewide 511 service. Illinois 511 will b...
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ISBN:
(纸本)9781604236354
Illinois is preparing to deploy 511. This paper discusses the concept determined to best meet the needs and capabilities of the Illinois DOT (IDOT) and our partners through a statewide 511 service. Illinois 511 will be deployed initially based on the significant amount of existing real-time data available through systems currently operated by IDOT and our partners. Depending on the specific area of the state this will include travel times, congestion by highway segment, construction, road closures, road weather information, winter road conditions, incidents, special events, and transit information with the possibility of additional information provided by our contractor. The Illinois 511 system will be a hybrid in several ways. The key data will be provided through public infrastructure and systems. The 511 system itself including telephony and interactive voice response is expected to be outsourced. The 511 system is intended to be integrated with other IDOT traveler information including internet services. The paper focuses on an innovative aspect of the proposed Illinois 511 system - its use of the Gary-Chicago-Milwaukee (GCM) Gateway Traveler Information System to transfer real-time traffic data between Illinois, Indiana, and Wisconsin, combined with the use of more typical call transfer methods to interface with other neighboring 511 systems.
Studies of urban rural migration often find the most likely migrants are adolescents and young people. Yet few studies have explored patterns of adolescent migration and the role of migration in transitions to adultho...
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Studies of urban rural migration often find the most likely migrants are adolescents and young people. Yet few studies have explored patterns of adolescent migration and the role of migration in transitions to adulthood. This study uses data from a population-based survey of over 1000 adolescents aged 10-19 in slum areas of Addis Ababa. Twenty-three per cent of boys and 45 per cent of girls have migrated into the city, mostly from rural areas, mainly for educational or work opportunities. Nearly one quarter of female migrants moved to escape early marriage in their rural homes. Migrants in this study were more vulnerable than natives in terms of lacking of parental presence, schooling, and social connectedness. Such young people, most of whom are girls, are 'falling through the cracks of policy and programs and in need of increased program attention.
Predicting highway safety performance in quantitative terms on the basis of a set of highway geometric design and traffic control features is the core of the ongoing Highway Safety Manual (HSM) development. While grea...
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ISBN:
(纸本)0309099595
Predicting highway safety performance in quantitative terms on the basis of a set of highway geometric design and traffic control features is the core of the ongoing Highway Safety Manual (HSM) development. While great efforts have been made to develop safety performance models for different types of highways, evaluating the applicability of the models with crash data from states that were not used in the original model development is equally important. This step is critical in future HSM applications because of many noticeable differences in crash data recording practice and driving behaviors across the various states. Potential application concerns need to be evaluated fully and addressed before the manual is officially published. This paper presents the application experience of the safety prediction models and methodology for segments of two-lane rural roads as proposed for inclusion in Part III of the HSM. The study used data for state routes in Louisiana. The results indicate that the prediction models performed reasonably well: there were small differences between the observed and predicted crash frequencies, with calibration parameters applied, for all segments on rural two-lane high-ways in Louisiana. The results at different analysis levels (from individual segments to a network of segments) are summarized, and several application issues such as the level of effort versus degree of accuracy, simplification of the calibration process, and the need for a reliability measurement are discussed.
For more than 20 years the Illinosis Department of Transportation (IDOT) has been using the results of its Condition Rating Survey (CRS) to make policy decisions regarding pavement rehabilitation activaties, assess ov...
For more than 20 years the Illinosis Department of Transportation (IDOT) has been using the results of its Condition Rating Survey (CRS) to make policy decisions regarding pavement rehabilitation activaties, assess overall network condition thoughout the state, and present funding requests to the state legislature. Before the early 1990s the CRSs were conducted manually by assigning a subjective rating raging from 1.0 to 9.0 to each pavement section in the network. Since 1994 IDOT has used automated equipment to record roughness, rutting, and faulting information and vidreotapes at a workstation to identify additional distress. The acquisition of the automated equipment resulted in changes to the CRS procedures. Instead of subjectively assigning a rating to a pavement section, automated sencor data are used in conjunction with the identification of up to five predominant distress types and severity levels to calculate a CRS value. Models were developed to accommodate this change within the department so that CRS ratings determined by the new procedures would be within one-half point of the rating that would have been assigned by manual procedures. In addition, the models were developed to minimize the amount of time spent biennially conducting the CRS for Interstate pavements and primary highways. As a result of the change in the CRS procedures, the rating of the predominant distress types and severities for each pavement section become more important. For this reason, the department identified the need for additional training that could be used to supplement the annual training class and provide immediate support to the CRS raters as they performed the condition surveys. An interactive, compact-disc (CD)-based training program that featurs full multimedia capabilities such as video, audio, and photograph was developed. An interactive testing and assessment package is also being developed as part of the training package. A summary of the development of the CRS ratin
作者：
Birnbaum, L.S.Bukzin, E.A.Saroyan, J.R.Leon S. Birnbaum holds a B.S. degree in Chemistry from City College of New York. He has completed graduate work in Chemistry at the University of Maryland and Temple University
and in Technology and Management at American University. He has been with the Navy Department Washington since 1949 and is currently Head of the Coatings and Chemistry Branch of the Materials Development and Application Office of the Naval Ship Engineering Center. Responsibilities of this Branch include such items as coatings corrosion control techniques insulation chemical cleaning water treatment toxicology and detection and decontamination of biological and chemical warfare agents. Prior to this Mr. Birnbaum was employed in the Industrial Test Laboratory Philadelphia Naval Shipyard from 1938 to 1949. Work during this period included supervision of a section which inspected paints and allied materials and petroleum products to determine their suitability for Naval use and direction of research in fire retardant treatments. He is a member of the American Chemical Society
Washington Paint Technical Group. National Association of Corrosion Engineers and the American Society of Naval Engineers. Mr. Bukzin is a research and development program manager in the Naval Ship Systems Command of the Department of the Navy in the fields of non-metallic materials
fuels lubricants cold weather operations and several other areas. He is a graduate chemical engineer from New York University with additional training in naval architecture and management which culminated in his participation in the Senior Development Program at Cornell University during the summer of 1960. He has been employed by the Command and its predecessor for the past 2b years and has been in his present position of R&D planning and programming for the past six years. Prior to that his major technical responsibilities were in the field of elastomers and their applications. He received several awards and published a number of papers during those years. Mr. Bukzin is a me
Report on paints used on surface ships and submarines for protection against corrosion and prevention of fouling, and on work connected with development and evaluation of such coatings;experiences with "hot plast...
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Report on paints used on surface ships and submarines for protection against corrosion and prevention of fouling, and on work connected with development and evaluation of such coatings;experiences with "hot plastic", "cold plastic" and vinyl paints;hazards in use of vinyl paints and safety precautions;test techniques;new toxics (which are only kind so far satisfactory antifouling formulations) under test.
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