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  • Development of a Conflict Analysis Methodology Using SSAM
    by keyword Project pages maintained by PI Search research CTRE is an Iowa State University center administered by the Institute for Transportation Address 2711 S Loop Drive Suite 4700 Ames IA 50010 8664 Phone 515 294 8103 FAX 515 294 0467 Website www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Development of a Conflict Analysis Methodology Using SSAM Researcher s Principal investigators Reginald Souleyrette Co principal investigator Tom Maze Student researcher Joshua Hochstein Project status Completed Start date 01 01 10 End date 12 31 11 Publications Report Development of a Conflict Analysis Methodology Using SSAM 2 73 mb pdf September 2012 Sponsor s partner s Sponsor s Iowa Department of Transportation Midwest Transportation Consortium About the research Abstract The ultimate goal of this research was to provide improved design guidance for J turn intersections by learning more about the safety and operational consequences of including or excluding certain geometric design features under various traffic volume conditions The proposed methodology to accomplish this research objective was to use the VisSim micro simulation software package in conjunction with Federal Highway Administration FHWA Surrogate Safety Assessment Model SSAM Three alternative high speed rural expressway intersection designs were

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-494810808 (2015-11-09)
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  • Evaluation of the Buena Vista IBRD Bridge: A Furthering of Accelerated Bridge Construction in Iowa
    bridge Researcher s Principal investigators Brent Phares 515 294 5879 bphares iastate edu Iowa State University Co principal investigators Terry Wipf 515 294 6979 tjwipf iastate edu Project status Completed Start date 11 15 08 End date 12 31 11 Publications Report Evaluation of the Buena Vista IBRD Bridge A Furthering of Accelerated Bridge Construction in Iowa 10 62 mb pdf February 2012 Tech transfer summary Evaluation of the Buena Vista IBRD Bridge A Furthering of Accelerated Bridge Construction in Iowa 2 46 mb pdf Feb 2012 Sponsor s partner s Sponsor s Iowa Department of Transportation Iowa Highway Research Board About the research Abstract The need to construct bridges that last longer are less expensive and take less time to build has increased The importance of accelerated bridge construction ABC technologies has been realized by the Federal Highway Administration FHWA and the Iowa Department of Transportation DOT Office of Bridges and Structures This project is another in a series of ABC bridge projects undertaken by the Iowa DOT Buena Vista County Iowa with the assistance of the Iowa Department of Transportation DOT and the Bridge Engineering Center BEC at Iowa State University constructed a two lane single span precast

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=912745765 (2015-11-09)
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  • Field Testing and Evaluation of a Demonstration Timber Bridge
    294 8103 FAX 515 294 0467 Website www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Field Testing and Evaluation of a Demonstration Timber Bridge Completed timber demonstration bridge Researcher s Principal investigators Brent Phares 515 294 5879 bphares iastate edu Iowa State University Co principal investigators Travis Hosteng 515 294 7197 kickhos iastate edu Project status Completed Start date 11 15 08 End date 12 31 11 Publications Report Field Testing and Evaluation of a Demonstration Timber Bridge 2 64 mb pdf February 2012 Tech transfer summary Field Testing and Evaluation of a Demonstration Timber Bridge 2 18 mb pdf Feb 2012 Sponsor s partner s Sponsor s Iowa Department of Transportation Iowa Highway Research Board About the research Abstract Asphalt wearing surfaces are commonly used on timber bridges with transverse glued laminated deck panel systems to help protect the timber components However poor performance of these asphalt wearing surfacesin the past has resulted in repeated repair and increased maintenance costs This report describes the field demonstration and testing of a newly constructed glued laminated timber girder bridge Previous field work revealed that differential panel deflections in the glued laminated deck were one significant factor

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1236876260 (2015-11-09)
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  • Geosynthetic Reinforced Soil for Low Volume Bridge Abutments
    May 2010 Railroad flat car bridge suppt on GRS bridge abutment Olympic Ave Buchanan Co IA July 2011 Load testing on GRS bridge abutment 250th Street Buchanan County IA October 2010 On site data logger with wireless data communication system Railroad flat car bridge on concrete footings supported on GRS abutment Buchanan Co Sept 2010 Researcher s Principal investigators David White 515 294 1463 djwhite iastate edu Co principal investigators Wayne Klaiber 515 294 8763 klaiber iastate edu Student researcher Shiyun Wang Project status Completed Start date 07 01 11 End date 12 31 11 Publications Report Final Report Geosynthetic Reinforced Soil for Low Volume Bridge Abutments 15 33 mb pdf February 2012 Tech transfer summary Tech Transfer Summary Geosynthetic Reinforced Soil for Low Volume Bridge Abutments 1 54 mb pdf Feb 2012 Sponsor s partner s Sponsor s Buchanan County Iowa Iowa Highway Research Board About the research Abstract The state of Iowa currently has approximately 25 000 bridges and ranks No 5 in the United States About 80 of these bridges are on low volume roads LVRs which are the responsibility of the County engineers Recent National Bridge Inventory data by FHWA reports that about 22 of the bridges in Iowa are structurally deficient while 5 of them are functionally obsolete Since many of these bridges are on rural county roads funding is limited to replace the deficient bridges Performance of substructure components i e abutment and foundation soils is believed to play a major role in the overall performance of the bridges Use of geosynthetic reinforced soil GRS abutment systems with flexible facing i e using wrapped geosynthetics concrete blocks etc can potentially be a cost effective and structurally efficient alternative for supporting LVR bridge abutments however there are no documented case studies in Iowa and there

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-2006885134 (2015-11-09)
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  • Managing Decisions Regarding Rural Expressway Routes and Associated Bypasses
    s Principal investigators Reginald Souleyrette Co principal investigators Chris Albrecht David Plazak Student researcher Joshua Hochstein Project status Completed Start date 06 01 07 End date 12 31 11 Publications Report Management of Rural Expressways for Improved Safety and Operational Performance 8 12 mb pdf October 2009 Tech transfer summary Managing Decisions Regarding Rural Expressway Routes and Associated Highway Bypasses 157 kb pdf Oct 2009 Sponsor s partner s Sponsor s Iowa Department of Transportation Midwest Transportation Consortium About the research Abstract For several years the Iowa Department of Transportation has constructed bypasses along rural highways Most bypasses were constructed on the state s Commercial Industrial Network CIN Now that work on the CIN has been completed and the system is open to traffic it is possible to study the impacts of bypasses In the past construction of highway bypasses has led community residents and business people to raise concerns about the loss of business activity For policy development purposes it is essential to understand the impacts that a bypass might have on safety the community and economics By researching these impacts policies can be produced to help to alleviate any negative impacts and create a better system that is ultimately more cost effective This study found that the use of trade area analysis does not provide proof that a bypass can positively or negatively impact the economy of a rural community The analysis did show that even though the population of a community may be stable for several years and per capita income is increasing sales leakage still occurs The literature site visits and data make it is apparent that a bypass can positively affect a community Some conditions that would need to exist in order to maximize a positive impact include the installation of signage along the bypass

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1180111705 (2015-11-09)
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  • Nighttime Construction Impacts on Safety, Quality, and Productivity
    an Iowa State University center administered by the Institute for Transportation Address 2711 S Loop Drive Suite 4700 Ames IA 50010 8664 Phone 515 294 8103 FAX 515 294 0467 Website www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Nighttime Construction Impacts on Safety Quality and Productivity Researcher s Principal investigators Jennifer Shane 515 294 1703 jsshane iastate edu Project status Completed Start date 05 07 09 End date 12 31 11 Publications Report A Guidebook for Nighttime Construction Impacts on Safety Quality and Productivity NA pdf February 2012 Related publication Nighttime Construction Impacts on Safety Quality and Productivity Dec 2011 Sponsor s partner s Sponsor s National Cooperative Highway Research Program NCHRP About the research Abstract Nighttime construction and maintenance activities are becoming more predominant in the transportation agencies across the United States Concern over the impact of nighttime activities on risk illumination nuisances productivity quality cost safety and communications compared to daytime activities has inhibited its use by some agencies Through a multi method approach of literature survey case studies with semi structured interviews and field data collection the discrepancies between nighttime and daytime activities were found to be minimal With early identification

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-1036322706 (2015-11-09)
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  • Traffic Safety Analysis for Local Agencies
    State University All rights reserved Traffic Safety Analysis for Local Agencies Crash scene Researcher s Principal investigator Tom McDonald Project status Completed Start date 01 01 04 End date 12 31 11 Publications Report Traffic Safety Analysis for Local Agencies 5 77 mb pdf April 2012 Sponsor s partner s Sponsor s Iowa Department of Transportation About the research Abstract Although many larger Iowa cities have staff traffic engineers who have a dedicated interest in safety smaller jurisdictions do not Rural agencies and small communities must rely on consultants if available or local staff to identify locations with a high number of crashes and to devise mitigating measures However smaller agencies in Iowa have other available options to receive assistance in obtaining and interpreting crash data These options are addressed in this manual Many proposed road improvements or alternatives can be evaluated using methods that do not require in depth engineering analysis The Iowa Department of Transportation DOT supported developing this manual to provide a tool that assists communities and rural agencies in identifying and analyzing local roadway related traffic safety concerns In the past a limited number of traffic safety professionals had access to adequate tools and training to

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-1711250359 (2015-11-09)
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  • Effects of Implements of Husbandry (Farm Equipment) on Pavement Performance
    research CTRE is an Iowa State University center administered by the Institute for Transportation Address 2711 S Loop Drive Suite 4700 Ames IA 50010 8664 Phone 515 294 8103 FAX 515 294 0467 Website www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Effects of Implements of Husbandry Farm Equipment on Pavement Performance Researcher s Principal investigator Lev Khazanovich University of Minnesota Co principal investigators Halil Ceylan 515 294 8051 hceylan iastate edu Iowa State University Project status Completed Start date 01 01 07 End date 12 01 11 Publications Report Effects of Implements of Husbandry Farm Equipment on Pavement Performance 12 59 mb pdf April 2012 Tech transfer summary Effects of Agricultural Equipment on Pavement Performance 760 47 kb pdf Oct 2012 Sponsor s partner s Sponsor s Minnesota Department of Transportation Pooled Fund About the research Abstract The Pooled Fund study Effects of Implements of Husbandry Farm Equipment on Pavement Performance is a project that started in 2007 and sponsored by the Minnesota Department of Transportation Iowa Department of Transportation Illinois Department of Transportation Minnesota Local Road Research Board and partners in the agricultural industry The objective of this study was to investigate the

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1670263201 (2015-11-09)
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