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  • Risk-Based Engineers Estimate
    FAX 515 294 0467 Website www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Risk Based Engineers Estimate Researcher s Principal investigators Jennifer Shane 515 294 1703 jsshane iastate edu Project status Completed Start date 01 11 13 End date 03 31 15 Publications Report Risk Based Engineers Estimate NA pdf March 2015 Sponsor s partner s Sponsor s Minnesota Department of Transportation About the research Abstract The review of any bid depends on the reliability of the estimate it is being compared to and making estimates is an essential element in the project approval process Thus departments of transportation DOTs need to put great effort into estimate preparation given that under estimating can lead to project delays while over estimating leads to inefficient use of funds Since delivering more lump sum projects is an Engineering Services Division strategic initiative for the Minnesota DOT MnDOT and lump sum items are often more difficult to price it is important to develop an effective practice for consistent cost estimating Risk based estimating combines both risk management and traditional cost estimating to develop an estimate that includes the risk in the project cost Risk based estimating thus serves as

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=291209398 (2015-11-09)
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  • Development of Railroad Highway Grade Crossing Consolidation Rating Formula
    Railroad Highway Grade Crossing Consolidation Rating Formula Researcher s Principal investigators Zachary Hans 515 294 2329 zhans iastate edu Co principal investigator Chris Albrecht Project status Completed Start date 09 27 13 End date 02 28 15 Publications Report Development of Railroad Highway Grade Crossing Consolidation Rating Formula 7 31 mb pdf February 2015 Tech transfer summary Development of Railroad Highway Grade Crossing Consolidation Rating Formula 91 68 kb pdf Feb 2015 Sponsor s partner s Sponsor s Iowa Department of Transportation Mid America Transportation Center U S DOT RITA About the research Abstract The goal of this project was to provide an objective methodology to support public agencies and railroads in making decisions related to consolidation of at grade rail highway crossings The project team developed a weighted index method and accompanying Microsoft Excel spreadsheet based tool to help evaluate and prioritize all public highway rail grade crossings systematically from a possible consolidation impact perspective Factors identified by stakeholders as critical were traffic volume heavy truck traffic volume proximity to emergency medical services proximity to schools road system and out of distance travel Given the inherent differences between urban and rural locations factors were considered and weighted differently based on crossing location Application of a weighted index method allowed for all factors of interest to be included and for these factors to be ranked independently as well as weighted according to stakeholder priorities to create a single index If priorities change this approach also allows for factors and weights to be adjusted The prioritization generated by this approach may be used to convey the need and opportunity for crossing consolidation to decision makers and stakeholders It may also be used to quickly investigate the feasibility of a possible consolidation Independently computed crossing risk and relative impact of consolidation may

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1418921282 (2015-11-09)
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  • GIS Automation of LiDAR DEM Cutting for Hydrologic/Hydraulic Modeling
    515 294 8103 FAX 515 294 0467 Website www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved GIS Automation of LiDAR DEM Cutting for Hydrologic Hydraulic Modeling Researcher s Principal investigator Brian Gelder Iowa State University Project status Completed Start date 04 01 11 End date 02 28 15 Publications Report Automation of DEM Cutting for Hydrologic Hydraulic Modeling 1 42 mb pdf February 2015 Related publications GIS Automation of LiDAR DEM Cutting for Hydrologic Hydraulic Modeling 946 06 kb pdf Tech transfer summary Feb 2015 Elevation Model Enforcement Scripts off site Feb 2015 Sponsor s partner s Sponsor s Iowa Department of Transportation Iowa Highway Research Board About the research Abstract Hydrologic analysis is a critical part of transportation design because it helps ensure that hydraulic structures are able to accommodate the flow regimes they are likely to see This analysis is currently conducted using computer simulations of water flow patterns and continuing developments in elevation survey techniques result in higher and higher resolution surveys Current survey techniques now resolve many natural and anthropogenic features that were not practical to map and thus require new methods for dealing with depressions and flow discontinuities A method

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-475922648 (2015-11-09)
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  • Proof of Concept: Biocement for Road Repair
    Concept Biocement for Road Repair Researcher s Principal investigator Jian Chu Iowa State University Co principal investigator Zhiyou Wen Iowa State University Project status Completed Start date 06 15 14 End date 01 31 15 Publications Report Proof of Concept Biocement for Road Repair 868 75 kb pdf March 2015 Sponsor s partner s Sponsor s Iowa State University Midwest Transportation Center USDOT OST R About the research Abstract Road repair is an expensive operation every year This cost can be greatly reduced if waste materials from the mining and biofuel industries can be used to substitute conventional materials for road repair or construction The objective of this project is to develop methods to produce a new construction material biocement using waste products and apply the new material for road repair and construction Two types of waste were used in this study One is limestone fines produced from a limestone mine in Iowa Another is organic acids a byproduct produced from a pyrolysis based biofuel manufacturing process The limestone fines and organic acids can be used to produce biocement under ambient temperature in an inexpensive way The cost effective biocement can be used as a substitute for expensive cement for

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-1688657360 (2015-11-09)
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  • Study of the Regulatory Issues Affecting Truck Freight Movement in the Midwest
    1996 2009 Iowa State University All rights reserved Study of the Regulatory Issues Affecting Truck Freight Movement in the Midwest Researcher s Principal investigators Jing Dong 515 294 3957 jingdong iastate edu Co principal investigator Chris Albrecht Project status Completed Start date 02 15 13 End date 01 31 15 Publications Report Study of the Regulatory Issues Affecting Truck Freight Movement in the Midwest 4 07 mb pdf December 2014

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1750423433 (2015-11-09)
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  • Modeling Merging Behavior at Lane Drops
    Phone 515 294 8103 FAX 515 294 0467 Website www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Modeling Merging Behavior at Lane Drops Researcher s Principal investigators Shauna Hallmark 515 294 5249 shallmar iastate edu Iowa State University Student researcher Nicole Oneyear Project status Completed Start date 02 01 13 End date 01 30 15 Publications Report Modeling Merging Behavior at Lane Drops 1 65 mb pdf February 2015 Tech transfer summary Modeling Merging Behavior at Lane Drops 532 85 kb pdf Feb 2015 Sponsor s partner s Sponsor s Federal Highway Administration Iowa Department of Transportation Smart Work Zone Deployment Initiative About the research Abstract In work zone configurations where lane drops are present merging of traffic at the taper presents an operational concern In addition as flow through the work zone is reduced the relative traffic safety of the work zone is also reduced Improving work zone flow through merge points depends on the behavior of individual drivers By better understanding driver behavior traffic control plans work zone policies and countermeasures can be better targeted to reinforce desirable lane closure merging behavior leading to both improved safety and work zone capacity The researchers

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=72040194 (2015-11-09)
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  • Deer-Vehicle Crash Information and Research Center
    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 Deer Vehicle Crash Information and Research Center Researcher s Principal investigators Keith Knapp 515 294 8817 kknapp iastate edu Project status Completed Start date 05 01 13 End date 12 31 14 Sponsor s partner s Sponsor s Federal Highway Administration

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-1089068711 (2015-11-09)
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  • Digital Documentation of Element Condition for Bridge Evaluation
    Simon Laflamme Project status Completed Start date 07 01 13 End date 12 31 14 Publications Report Digital Documentation of Element Condition for Bridge Evaluation 33 3 mb pdf February 2015 Sponsor s partner s Sponsor s Mid America Transportation Center U S DOT RITA About the research Abstract Bridge condition inspection data provide critical and rich information for assessing structural condition Currently the majority of bridge inspection methods use printed checklists and their interpretation is labor intensive subject to personal judgment and prone to error To realize the full benefits of bridge inspections there is a need to automate the data management process This research project implemented Bridge Information Modeling BrIM technology for bridge inspections and compared it to the conventional approach of paper checklists This environment combines a 3D representation of the infrastructure and allows the integration of inspection data such as the presence of damages types of damages severity localization and previous maintenance decisions In this report BrIM acronym is used to refer to the database that integrates a 3D bridge model and bridge element condition data In order to validate this approach 2D drawings and previous inspection and maintenance data of two bridges located in Ames

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1095641851 (2015-11-09)
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