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  • Seismic Performance of an I-Girder to Inverted-Tee Bent Cap Connection
    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 Seismic Performance of an I Girder to Inverted Tee Bent Cap Connection Researcher s Principal investigators Sri Sritharan 515 294 5238 sri iastate edu Iowa State University Co principal investigators Shashi Nambisan

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-1618006291 (2015-11-09)
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  • Use of Lateral Position as a Safety Surrogate Measure
    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 Use of Lateral Position as a Safety Surrogate Measure Researcher s Principal investigators Shauna Hallmark 515 294 5249 shallmar iastate edu Iowa State University Project status Completed Start date 08 01 09 End date 01 31 11 Publications Reports Relationship between Lane Departure

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1227740931 (2015-11-09)
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  • Earthwork Volumetric Calculations and Characterization of Additional CFED Soils - CFED Phase IV
    CFED Soils CFED Phase IV Illustration of soil volumes in bank loose and compacted state Researcher s Principal investigators David White 515 294 1463 djwhite iastate edu Student researcher Jiake Zhang Project status Completed Start date 01 01 10 End date 12 31 10 Sponsor s partner s Sponsor s Caterpillar About the research Abstract Caterpillar has developed proprietary software technology Compaction Forecasting Expert Database CFED to predict compaction performance for site specific applications This report Phase IV presents laboratory test results of five soil samples collected from field project sites in Utah Texas North Dakota and Iowa and the corresponding CFED analysis Recommendations for presentation of in situ test results and soil mineralogy information in CFED and a database of volumetric factors for earthwork quantity estimation from literature review are also reported herein Shrinkage and swell factors of a total of 154 soils were collected from the literature and grouped into seven material groups 1 rocks 2 gravels 2 sands 4 silts 5 clays 6 minerals and 7 other soils The swell factors statistics showed a narrow range for gravel soils minimum value maximum value 0 11 compared to other soils with minimum value maximum value 0 22 to

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=951992062 (2015-11-09)
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  • Evaluation of a Bridge Constructed with Ultra High Performance Concrete
    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 Evaluation of a Bridge Constructed with Ultra High Performance Concrete Maneuvering a Pi girder into place Pi girders in place Buchanan County Iowa Researcher s Principal investigators Terry Wipf 515 294 6979 tjwipf iastate edu Brent Phares 515 294 5879 bphares iastate edu Iowa State University Co principal investigators F S Fanous 515 294 9416 fanous iastate edu Matt Rouse 515 201 6686 jmr19 iastate edu Project status Completed Start date 09 01 06 End date 12 31 10 Publications Report Design Construction and Field Testing of an Ultra High Performance Concrete Pi Girder Bridge 17 40 mb pdf January 2011 Tech transfer summary Design Construction and Field Testing of an Ultra High Performance Concrete Pi Girder Bridge 3 49 mb pdf Jan 2011 Sponsor s partner s Sponsor s Buchanan County Iowa Iowa Department of Transportation Iowa Highway Research Board About the research Abstract With the assistance of the Iowa DOT and the Bridge Engineering Center

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1165509313 (2015-11-09)
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  • Horizontal Curve Identification and Evaluation
    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 Horizontal Curve Identification and Evaluation Researcher s Principal investigators Zachary Hans 515 294 2329 zhans iastate edu Co principal investigators Reginald Souleyrette Project status Completed Start date 01 01 10 End date 12 31 10 Publications Report Horizontal Curve Identification and Evaluation 897 88 kb pdf September 2012 Sponsor s partner s Sponsor s Iowa Department of Transportation About the research Abstract Horizontal curves are over represented high frequency high severity crash locations Significant opportunities exist to mitigate these crashes through relatively low cost safety improvements such as paved shoulders rumble strips stripes and improved signing and delineation However the presence of horizontal curvature is not captured as part of the Iowa crash report and the Iowa Department of Transportation DOT maintained database of public roadways does not identify the locations of horizontal curvature Therefore it is currently difficult to identify the locations of curves systematically and particularly high crash curves and the characteristics of these curves The goal of this project was to expand the Iowa Department of Transportation DOT

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=82223295 (2015-11-09)
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  • Implementation and Evaluation of Smart Timber Bridge Concepts to Provide Continuous Structural Condition Assessment
    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 Implementation and Evaluation of Smart Timber Bridge Concepts to Provide Continuous Structural Condition Assessment Researcher s Principal investigators Brent Phares 515 294 5879 bphares iastate edu Iowa State University Co principal investigators

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=2115738595 (2015-11-09)
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  • Road Safety Audit for Prince of Wales Island, Alaska
    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 Road Safety Audit for Prince of Wales Island Alaska Delienators at horizontal curve on Hydaburg Highway Researcher s Principal investigator Tom McDonald Project status Completed Start date 10 25

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1266245306 (2015-11-09)
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  • Roadway Lighting and Safety: Phase II-Monitoring Quality, Durability, and Efficiency
    Durability and Efficiency Vehicle was equipped with Roadway Monitoring System Researcher s Principal investigators Omar Smadi 515 294 7110 smadi iastate edu Iowa State University Co principal investigators Basak Aldemir Bektas 515 294 4033 basak iastate edu Neal Hawkins 515 294 7733 hawkins iastate edu Student researcher Basak Aldemir Bektas Project status Completed Start date 01 01 09 End date 12 31 10 Publications Report Roadway Lighting and Safety Phase II Monitoring Quality Durability and Efficiency 1 13 mb pdf November 2011 Tech transfer summary Roadway Lighting and Safety Phase II Monitoring Quality Durability and Efficiency 259 48 kb pdf Nov 2011 Sponsor s partner s Sponsor s Iowa Department of Transportation Iowa Highway Research Board About the research Abstract This Phase II project follows a previous project titled Strategies to Address Nighttime Crashes at Rural Unsignalized Intersections Based on the results of the previous study the Iowa Highway Research Board IHRB indicated interest in pursuing further research to address the quality of lighting rather than just the presence of light with respect to safety The research team supplemented the literature review from the previous study specifically addressing lighting level in terms of measurement the relationship between light levels and

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-1673438847 (2015-11-09)
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