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  • Performance Monitoring of Boone County Expo Pavement Sections, (Continuation - Phase III)
    Phase III Researcher s Principal investigators Pavana Vennapusa 515 294 2395 pavanv iastate edu Co principal investigators David White 515 294 1463 djwhite iastate edu Project status In progress Start date 01 09 14 End date 12 31 16 Sponsor s partner s Sponsor s Iowa Department of Transportation Iowa Highway Research Board About the research Abstract Pavement foundation test sections at the Central Iowa Expo site constructed in 2012 and paved in 2013 represents one of the most comprehensive studies of its kind in Iowa Early research results demonstrate that the various pavement foundation systems provide significantly different support conditions e g stiffness drainage durability and uniformity Further the various material and treatments cover a wide range of material and construction costs To more fully evaluate how to provide the best value pavement foundation system for Iowa roads a performance monitoring program is needed Past research have not specifically evaluated pavement foundation conditions with sufficient duration and testing frequency to properly characterize changes due to environmental conditions with time This project site creates a unique opportunity to conduct in situ performance monitoring of the pavement system and foundation layers The primary goals of this project are to conduct performance

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=701101105 (2015-11-09)
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  • Validation of Gyratory Mix Design in Iowa
    1996 2009 Iowa State University All rights reserved Validation of Gyratory Mix Design in Iowa Researcher s Principal investigators Chris Williams 515 294 4419 rwilliam iastate edu Iowa State University Project status In progress Start date 01 07 14 End date 02 29 16 Sponsor s partner s Sponsor s Federal Highway Administration State Planning and Research Funding Iowa Department of Transportation Iowa Highway Research Board About the research Abstract

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-1591479650 (2015-11-09)
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  • Groundwater System Impacts on the US 63 Railway Underpass Near Waterloo, Iowa - Phase II
    Impacts on the US 63 Railway Underpass Near Waterloo Iowa Phase II Researcher s Principal investigator LaDon Jones 515 294 0641 lcjones iastate edu Iowa State University Project status In progress Start date 01 01 14 End date 12 31 16 Sponsor s partner s Sponsor s Iowa Department of Transportation About the research Abstract The Iowa Department of Transportation DOT maintains a railroad underpass on Iowa 63 E Mullen Ave in Waterloo between Dane and Newell Streets This underpass is depressed below the natural ground surface and below the existing groundwater table which results in the potential for seepage from the groundwater into the underpass To control this seepage the Iowa DOT installed and maintains a groundwater dewatering system that depresses the groundwater table at the underpass to below the underpass elevation In the future the Iowa DOT plans to replace the railroad underpass with an overpass and fill in the existing underpass It is unknown at present what impact this will have on the groundwater table at and in the vicinity of the existing underpass The objective of this study is to provide technical assistance to the Iowa DOT Office of Location and Environment with regard to evaluating the possible impacts on the groundwater system in the vicinity due to the removal of the existing railroad underpass Phase I has been completed and the results indicated that the current field data is not sufficient to adequately define the zone of influence of the current dewatering system Additional field data collection and modeling is needed to adequately define the impact of the current dewatering system on the groundwater table in the vicinity of the underpass This information is critical to determining what if any dewatering system will needed and to document any changes in the groundwater zone of influence

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=230233182 (2015-11-09)
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  • Implementation Manual for 3D Engineered Models for Construction
    University All rights reserved Implementation Manual for 3D Engineered Models for Construction Researcher s Principal investigators Peter Taylor 515 294 9333 ptaylor iastate edu Project status In progress Start date 01 01 14 End date 09 30 15 Sponsor s partner s Sponsor s Federal Highway Administration State Planning and Research Funding Iowa Department of Transportation About the research Abstract Three dimensional 3D engineered modeling is a relatively new and

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-1851880082 (2015-11-09)
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  • Trucking and Rail Intermodal Hub in the St. Louis Region
    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 Trucking and Rail Intermodal Hub in the St Louis Region Researcher s Principal investigator Ray Mundy rmundy umsl edu University of Missouri

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1560065421 (2015-11-09)
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  • Static Load Test of a Steel Pile at a Sand Site for Adopting a Higher Resistance Factor
    Iowa State University All rights reserved Static Load Test of a Steel Pile at a Sand Site for Adopting a Higher Resistance Factor Researcher s Principal investigators Sri Sritharan 515 294 5238 sri iastate edu Iowa State University Project status In progress Start date 12 15 13 End date 03 31 14 Sponsor s partner s Sponsor s Iowa Department of Transportation About the research Abstract Extensive work on load

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-1328834105 (2015-11-09)
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  • Improving Estimations of Real-Time Traffic Speeds During Weather for Winter Performance Measurement
    University Project status In progress Start date 11 15 13 End date 07 31 16 Sponsor s partner s Sponsor s Federal Highway Administration State Planning and Research Funding Federal Highway Administration Transportation Pooled Fund Iowa Department of Transportation Partner s possibly also use CWIMS branding on this one About the research Abstract Winter highway maintenance is an annual multi billion dollar operation aimed at improving the safety and mobility of the highway system To help the winter highway maintenance agencies optimize the usage of resources it is important to develop a performance measurement system that can evaluate how well maintenance activities have been performed In Iowa Highway Research Board Project TR 491 researchers developed a performance measure based on average vehicle speed which takes into account severity of the storm The model uses 6 categorical variables to define a storm and compute the acceptable traffic speed drop A previous Iowa Department of Transportation DOT agreement developed a sequential Bayesian dynamic model based on the model in TR 491 which is capable of predicting the acceptable drops during the storm and allow uncertainty in input variables sensor measurements to propagate into uncertainty in speed reduction One limitation of the sequential Bayesian model is that its uncertainty measure does not account for model uncertainty and the uncertainty in human weather interaction The model in TR 491 is based on survey of expert opinion and its uncertainty is not considered in the original development and our follow up work The uncertainty in human behavior under different weather conditions is also not considered due to lack of time The Iowa DOT is interested in refining this sequential Bayesian model to produce more accurate real time prediction of traffic speed drops with better uncertainty measures so that it can be used to evaluate the

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-233083993 (2015-11-09)
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  • Impact of Curling and Warping on Concrete Pavement
    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 Impact of Curling and Warping on Concrete Pavement Researcher s Principal investigators Halil Ceylan 515 294 8051 hceylan iastate edu Iowa State University Co principal investigators Peter Taylor 515 294 9333 ptaylor iastate edu Kasthurira Gopalakrishnan 515 294 3044 rangan iastate edu Iowa State University Sunghwan Kim sunghwan iastate edu Project status In progress Start date 10 01 13 End date 07 30 16 Sponsor s partner s Sponsor s Iowa Department of Transportation Iowa Highway Research Board About the research Abstract The impacts of curling and warping on long term pavement performance are not well understood While some recent studies have pointed to a strong connection between the two others have stated that these findings may not be as significant as first thought At the same time we continue to seek out more cost effective ways of designing and constructing pavements without sacrificing performance In order to do this the curling and warping relationship must be better understood The objectives of this project are to Select existing concrete pavements of various ages thickness and

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=154056929 (2015-11-09)
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