CTRE

Center for Transportation Research and Education

CTRE|Research|In-Progress

In-Progress Research

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Oct, 2026

Evaluation of Service Life Design of Bridges

Nov, 2022

Building Information Modeling (BIM) for Bridges and Structures

Sep, 2021

Evaluation of RePLAY for Mainline, Shoulders, and Rumbles: Pilot Study in Clinton County

Apr, 2021

Implementation of the Negative Moment Reinforcing Detail Recommendations

Feb, 2021

Asset Management, Extreme Weather, and Proxy Indicators

Jul, 2020

Evaluation of Work-Zone Safety Using SHRP2 Naturalistic Driving Study Data

Jul, 2020

Developing a Research-Grade Iowa Work Zone Database

Jul, 2020

Cyberinfrastructure Enabling Safety and Mobility Discoveries

Jul, 2020

Automating Wrong Way Detection Using Existing CCTV Cameras

Jun, 2020

Develop Statewide Urban Design Standards and Specifications Manuals for Public Improvements

May, 2020

Evaluation, Laboratory Testing, Construction Documentation, and Field Testing/Monitoring of US 52 Overflow Bridge over Mississippi River

Apr, 2020

Field Monitoring of Erosion and Sediment Control Practices and Development of Additional Iowa DOT Design Manual Guidance

Apr, 2020

Self-Heating Electrically Conductive Concrete Demonstration Project

Mar, 2020

Increase Service Life at Bridge Ends through Improved Abutment and Approach Slab Details and Water Management Practices

Mar, 2020

Un-Ticketing: An Upside-Down Approach to Speed Compliance

Dec, 2019

Evaluation of Performance of A1010 Bridge Steel

Dec, 2019

Midwest Cross-Jurisdictional Image Verification

Dec, 2019

Guidance on Active Work Zone Data Archival

Dec, 2019

Virtual Reality Implementation for Public Engagement: Display 1—Work Zone Safety

Dec, 2019

Fatigue Evaluation of Reinforced and Unreinforced Hand Holes in Light Poles

Dec, 2019

Iowa Traffic Safety Improvement Program (TSIP) Process Improvement, Phase II

Oct, 2019

Determination of the Forces in X-Frames in Curved Girder Bridges

Sep, 2019

High Friction Surface Treatment for High Crash Locations, Phase II: Performance Assessment

Sep, 2019

High Friction Surface Treatment for High Crash Locations

Aug, 2019

TIMELI: Traffic Incident Management Enabled by Large-data Innovations

Aug, 2019

Verification of LRFD Resistance Factors for Drilled Shafts Using Field Tests

Jul, 2019

Deep-Learning Based Approach for Scene Analysis and Trajectory Tracking

Jul, 2019

Development of Adjustment Factors for HCM Sixth Edition Freeway Work Zone Capacity Methodology

Jun, 2019

Evaluating All-Weather Pavement Markings & Lab Methods to Simulate Field Exposure

Jun, 2019

Low Cost Rural Surface Alternatives Phase III: Demonstration Project and Phase IV: Frost Depth Monitoring and Prediction

Jun, 2019

Work Zone Data Exchange Committee Participation and Data Feed

Jun, 2019

Iowa DOT Office of Maintenance Snow Plow Optimization

May, 2019

Predictions of Driver Safety in Advancing Age: Real-World Recorders

May, 2019

Evaluation of Performance of a Short-Span T-Beam Bridge in Buchanan County

May, 2019

Performance and Load Response of Rigid Pavement Systems

Feb, 2019

Laboratory and Field Evaluation of an Alternative UHPC Mix and an Associated UHPC Bridge

Feb, 2019

Traffic Sign Life Expectancy

Jan, 2019

Assessing and Enhancing the Transportation Resilience for the State of Iowa

Jan, 2019

Evaluation of Iowa Truck Parking Information and Management System

Jan, 2019

SHRP2 (R02) – GeoTechTools Deployment Support

Dec, 2018

Evaluate, Modify, and Adapt the ConcreteWorks Software for Iowa’s Use

Dec, 2018

In-Service Evaluation of Culvert Extensions

Dec, 2018

In-Service Evaluation of Railroad Signal and Stop Arm Pole Protection

Dec, 2018

Evaluation of Speed Limit Policy Impacts on Iowa Highways

Dec, 2018

Automating Near Miss Crash Detection using Existing Traffic Cameras

Dec, 2018

Pavement Management Support for the Iowa DOT and Local Agencies

Dec, 2018

Evaluation of the Use of Link Slabs in Bridge Projects

Dec, 2018

Can Missouri Gravel Beds Function as a Year-Round Production System to Improve Tree Root Structure and Fine Biomass vs. Traditional Pot in Pot Production Methods

Dec, 2018

Role of Coarse Aggregate Porosity on Chloride Intrusion in HPC Bridge Decks

Dec, 2018

Partially Grouted Revetment for Low-Volume Road Bridges

Nov, 2018

Relationships between Weather and Roadway Safety

Nov, 2018

Chip Seal Design and Specifications

Nov, 2018

NCHRP 18-17 Entrained Air Void System for Durable Highway Concrete

Oct, 2018

Iowa DOT Office of Traffic and Safety SAVER Tutorial

Oct, 2018

Connection Details and Field Implementation of UHPC Piles – Phase II

Oct, 2018

Iowa DOT Office of Maintenance Winter Operations Decision Support Tools

Oct, 2018

Performance Based Evaluation of Cost Effective Aggregate Options for Granular Roadways

Sep, 2018

Go! Magazine

Sep, 2018

Guidelines to Establish Effective and Efficient Timelines and Incentives for ABC

Aug, 2018

Autonomous Sensing Skin for Detection and Localization of Fatigue Cracks

Jul, 2018

NCHRP 24-46: Development of an Implementation Manual for Geotechnical Asset Management for Transportation Agencies

Jun, 2018

Holding Strategies for Low-Volume State Routes

Jun, 2018

Development of a Comprehensive Access Management Policy and Guidelines

Jun, 2018

Safety and Performance Criteria for Retroreflective Pavement Markers

Jun, 2018

Cost-Competitive Timber Bridge Designs for Long-Term Performance

Jun, 2018

Buchanan County Smart Timber GRS Abutment Bridge

May, 2018

Development of Quality Standards for Inclusion of High Recycled Asphalt Pavement Content in Asphalt Mixtures-Phase III

May, 2018

Investigation of Wrong-Way Driving

Mar, 2018

Michigan Rural Safety Performance Function (SPFs) Development and Support

Feb, 2018

Hybrid Concrete for Advancing Pavement Performance

Feb, 2018

Use of SHRP2 NDS Data to Evaluate Roadway Departure Characteristics

Dec, 2017

Highway Safety Improvement Program Implementation Process

Dec, 2017

AASHTOWare BrM Bridge Management System Implementation and Operation

Dec, 2017

Implementation of the Iowa DOT Pavement Management Optimization Model

Dec, 2017

Intermodal Gantry Crane Pavement and Foundation Design Improvement

Dec, 2017

Cement Changes and Solutions to the Industry

Dec, 2017

NDOR Evaluation of Opportunities and Challenges of Using INRIX Data for Real-Time Performance Monitoring and Historical Trend Assessment

Dec, 2017

Groundwater System Impacts on the US 63 Railway Underpass Near Waterloo, Iowa – Phase II

Oct, 2017

MnDOT LRRB Minnesota Local Agency Pavement Marking: Mining Existing Data

Oct, 2017

Integration of Structural Health Monitoring into Multilayer Statewide Bridge Maintenance and Management Practices

Sep, 2017

Accelerated Bridge Construction Approaches for Bridge Rehabilitation

Sep, 2017

Stream and Watershed Delineations using LiDAR Data

Sep, 2017

Reliability of Element-Level Bridge Inspections

Sep, 2017

Condition Assessment Tools for Post-Tensioned Bridges

Sep, 2017

SHRP2 Implementation Assistance Program

Aug, 2017

I-74 Mississippi River Bridge VR Simulation

Aug, 2017

Developing Risk-Based Bridge Inspection Practices

Aug, 2017

Bridges for Life: Better Data in Support of Performance Management Analysis

Aug, 2017

Driving Simulator Study of Merge Signs

Aug, 2017

NCHRP Standard Definitions for Comparable Pavement Cracking Data

Aug, 2017

Quantifying Pavement Albedo

Jul, 2017

Cost-Effective Field Test Methods for LRFD Resistance Factors of Drilled Shafts

Jun, 2017

Culvert Lateral Earth Pressure Sensors: Instrumentation of a Box Culvert During and After Construction

Jun, 2017

Improved Analytical Techniques for Historic Covered Bridges-Phase II

Jun, 2017

Improved Ratings for Covered Bridges through Load Testing – Phase II

Jun, 2017

Development of a Smart Timber Bridge-Phase V: Development of a Vehicle Characterization

May, 2017

Research Utilizing the SHRP2 Safety Data to Support Highway Safety

May, 2017

Risk-Based Bridge Management: A Methodology to Assess and Incorporate Risk in Decision-Making

May, 2017

A Multidisciplinary Approach to Investigate Work Zone Safety using SHRP 2 Safety Data

Mar, 2017

Road-Based Accessibility to Essential Services

Mar, 2017

Condition-Based Maintenance and Management of Aging Transportation Infrastructure

Feb, 2017

Useful Life of Lithium-Ion Batteries

Feb, 2017

MnDOT Evaluation of Workzone Safety Using the SHRP2 Naturalistic Driving Study Data

Dec, 2016

St. Louis Freight Development Plan

Dec, 2016

Improved Sheet Pile Systems for Transportation Infrastructure

Dec, 2016

Benefits of an Intermodal Hub – The Case for St. Louis

Dec, 2016

Experimental Evaluation of Existing and Retrofit Designs of Bridge Finger Joints

Dec, 2016

Roadway Infrastructure in Various 3D Visualization Modes

Dec, 2016

Effect of Wind-Induced Unsteady Vortex Shedding, Diurnal Temperature Changes, and Transit Conditions on Truss Structures Supporting Large Highway Signs

Dec, 2016

Optimizing Performance Characteristics of Steel Fiber-Reinforced Lightweight Concrete (SFRLWC) for Wearing Surface Application on Orthotropic Steel Decks

Dec, 2016

Women as Assets in Railroad/Transportation Operational Roles

Nov, 2016

Networks Subject to Extreme Flood Events

Oct, 2016

Development of a Mix Formation and Pavement Design Using Asphalt-Rubber Binders and Biobased Additives

Aug, 2016

Technical Analysis to Support the Bridge Condition Performance Measure

Jun, 2016

Improving Adaptive/Responsive Signal Control Performance: Implications of Non-Invasive Detection and Legacy Timing Practices

Jun, 2016

Marketing Plan Implementation for Delineation of Curves: A Proven Safety Countermeasure

Apr, 2016

Development of Crash Modification Factors for Curve Chevrons

Dec, 2015

Active Traffic Management Case-Study: Phase 1

Dec, 2015

Synthesis of Information Related to Highway Problems. Topic 46-13. Practice of Rumble Strips and Rumble Stripes

Dec, 2015

Development of Renewable Polymers for Use in Asphalt Pavements

Nov, 2015

Impact of Lower Asphalt Binder for Coarse HMA Mixes

Aug, 2015

Implementation of Thin Bonded Concrete Overlays of Asphalt Pavements (BCOAs)

Jun, 2015

Measuring Project Complexity and Its Impact

Feb, 2015

SHRP 2 (S04(A) Roadway Information Database Development and Technical Coordination and Quality Assurance of the Mobile Data Collection Project (S04B)

Feb, 2015

Performance and Design of Bridge Approach Panels in Wisconsin

Jan, 2015

Development of a Smart Timber Bridge-Development of Data Processing Techniques for Determining Changes in Structural Stiffness

Dec, 2014

Seismic Performance of Connections that Facilitate Accelerated Bridge Construction

Sep, 2014

Evaluation of Thermal Integrity Profiling for Deep Foundations

Jun, 2014

Work Plan for the Bridge Center and Bridge Engineer Program FY2014-Dynamic Sensor

May, 2014

SEISMIC: Development and Verification of Concrete Models for Pier Walls and Hollow Columns

Mar, 2014

Static Load Test of a Steel Pile at a Sand Site for Adopting a Higher Resistance Factor

Sep, 2013

Charging Infrastructure Planning and Impact Assessment for Plug-in Electric Vehicles

Dec, 2012

Performance of Lightweight Foam Concrete Fill and Post-Grouted Drilled Shafts in Broadway Viaduct Replacement

Sep, 2010

Development and Field Evaluation of a Prototype Tool to Detect and Identify Left Turning Vehicles

Aug, 2010

A Demonstration Project for the Illinois Tollway Utilizing Post-Consumer Asphalt Roofing Shingles

Jun, 2010

Iowa Traffic Safety Data Service

Jun, 2010

Pavement Markings Concept

May, 2010

Go! Using an Online Magazine to Convey Real-World Math and Science Concepts Related to Transportation

Apr, 2010

Development of Stormwater Quality BMP Specifications

Feb, 2010

Application of Visualization and Simulation Program to Improve Work Zone Safety and Mobility

Dec, 2009

Enhancements to the Incident Mapping and Analysis Tools (IMAT)

Dec, 2009

Location Tool Support for TraCS Location Tool States

Dec, 2009

Minnesota Local Agency Pavement Marking Practices-Phase I

Dec, 2009

New Implementation of the Incident Location Tool

Sep, 2009

Incident Location Tool Support for Iowa DOT

Sep, 2009

Incident Location Tool Support for the Iowa Department of Transportation

Jun, 2009

CARS Location Database Creation, Update and Validation

Jun, 2009

CARS Location Database Update and Validation

Jun, 2009

Pavement Marking Demonstration Project

Apr, 2009

Intelligent Compaction for Evaluation of Geogrid Reinforced Base Material

Feb, 2009

Safety Data Improvement

Dec, 2008

Weatherview: XML Data Structure & Maintenance

Oct, 2008

Update of “Roundabouts: An Informational Guide”

Sep, 2008

Development of New Test Procedures for Measuring Fine and Coarse Aggregate

Aug, 2008

Laboratory Testing on HMA and Asphalt

Aug, 2008

Roadway Departure: Marketing, Outreach, and Education

Aug, 2008

Geospatial safety analysis for highway curves and resurfacing projects

Jul, 2008

Sign Management System for Iowa DOT

May, 2008

Iowa DOT Pavement Marking Management System: Research and Field Evaluation Assistance

Dec, 2007

Development and Demonstration of Fleet Management Strategies for Timber Bridges

Dec, 2007

National Training for Integrating Materials and Construction Practices in Concrete Pavements: A State-of-the-Practice Manual

Dec, 2007

Bridge Construction Practices Using Incremental Launching, NCHRP Project 20-07/Task 229

Nov, 2007

Testing Iowa Asphalt Mixtures for the AASHTO Mechanistic-Empirical Pavement Design Procedure

Nov, 2007

Assessment of Iowa Climatic Data and Its Integration into the AASHTO Mechanistic-Empirical Pavement Design Procedure

Nov, 2007

Concrete Pavement Preservation and Rehabilitation

Jul, 2007

Work Zone Forecasting Service

Jun, 2007

Development of a 5 Year Research Plan for the Development of a Smart Glued-Laminated Timber Bridge

Jun, 2007

Needs Assessment for Advancing Timber Utilization in Mainline and Shortline Railroad Applications

Jun, 2007

Older Driver Demonstration Study, City of Des Moines

Dec, 2006

County Non-FAE Paved Road Condition: Data Collection, Summary, and Delivery, Phase II

Nov, 2006

Evaluation of a Precast, Post-Tensioned Bridge Paving Notch

Nov, 2006

Investigation of the Impact of Rural Develoment on Secondary Road Systems (TR-548)

Oct, 2006

Safety and Operational Effectiveness of One-lane Roundabouts at High Speed Highways

Sep, 2006

Crash Mapping Analysis Tool for Minnesota DOT

Aug, 2006

Iowa Event Operations

Aug, 2006

Impact of Increased Freight Traffic on Pavement Maintenance Costs

Aug, 2006

Snow and Ice Operations Cost Analysis

Jul, 2006

Cooperative Intersection Collision Avoidance System Benefit/Cost Analysis Tool

Jun, 2006

Evaluation of Fine Aggregate Characteristics Tests and Their Relationship to HMA Performance

Jun, 2006

Testing Iowa Portland Cement Concrete Mixtures for the Mechanistic-Empirical Pavement Design Guide

Jun, 2006

High-Speed Expressway Intersections Study of Crash Risk Factors

Dec, 2005

Minnesota Mapping Analysis Tool (MnMAT) Enhancements

Dec, 2005

Winter Weather Crash Trends on Iowa Primary Roads

Aldemir Bektaş, Başak

basak@iastate.edu | View Profile

Associate Scientist, CTRE , Institute for Transportation

Adjunct Assistant Professor, Department of Civil, Construction, and Environmental Engineering 

Bektaş, Fatih

fbektas@iastate.edu | View Profile

Associate Scientist, CTRE , Institute for Transportation

Adjunct Assistant Professor, Department of Civil, Construction, and Environmental Engineering

Burdine, Nick

bird@iastate.edu | View Profile

Systems Analyst, InTrans , Institute for Transportation

Affiliate Researcher, Center for Weather Impacts on Mobility and Safety

Day, Christopher

cmday@iastate.edu | View Profile

Affiliate Researcher , Institute for Transportation

Assistant Professor, Department of Civil, Construction, and Environmental Engineering

Dong, Jing

jingdong@iastate.edu | View Profile

Transportation Engineer , Institute for Transportation

Assistant Professor, Department of Civil, Construction, and Environmental Engineering

Hallmark, Shauna

shallmar@iastate.edu | View Profile

Director, InTrans , Institute for Transportation

Professor, Department of Civil, Construction, and Environmental Engineering

Director, Midwest Transportation Consortium

Hans, Zachary

zhans@iastate.edu | View Profile

Director, CWIMS , Institute for Transportation

Director, Center for Weather Impacts on Mobility and Safety

Hawkins, Neal

hawkins@iastate.edu | View Profile

Associate Director, InTrans , Institute for Transportation

Adjunct Lecturer, Department of Civil, Construction, and Environmental Engineering

Co-Director, REACTOR

Knickerbocker, Skylar

sknick@iastate.edu | View Profile

Research Engineer, REACTOR , Institute for Transportation

Co-Director, REACTOR Laboratory

Naraghi, Hossein

hnaraghi@iastate.edu | View Profile

Research Engineer, CTRE , Institute for Transportation

Nlenanya, Inya

inya@iastate.edu | View Profile

Transportation Research Specialist/GIS Specialist, CTRE , Institute for Transportation

Program Coordinator, Iowa Pavement Management Program

Sharma, Anuj

anujs@iastate.edu | View Profile

Research Scientist and Leader, REACTOR , Institute for Transportation

Co-Director, REACTOR Laboratory

Associate Professor, Department of Civil, Construction, and Environmental Engineering

Shaw, John

jwshaw@iastate.edu | View Profile

Researcher, CTRE , Institute for Transportation

Affiliate Researcher, Center for Transportation Research and Education

Smadi, Omar

smadi@iastate.edu | View Profile

Director, CTRE , Institute for Transportation

Adjunct Assistant Professor, Department of Civil, Construction, and Environmental Engineering

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