InTrans Publications

Proceedings of the 2007 Mid-Continent Transportation Research Symposium

Ames, Iowa, August 16–17, 2007

Copyright © 2007 by Iowa State University.

The papers and extended abstracts included in these proceedings summarize over 110 presentations scheduled for this sixth biennial event at Iowa State University. Short abstracts are also included that summarize presentations for which manuscripts were not available at the time of publication of these proceedings. The topics cover a broad spectrum of transportation issues in the following areas: asphalt pavement, asset management, bridges and structures, pavements, planning, safety, traffic engineering and operations, intelligent transportation systems, human factors, environment, geotechnical engineering, and weather.

The opinions, findings, and conclusions expressed in this publication are those of the various authors and not necessarily those of the sponsors. The accuracy of the information presented herein is the responsibility of the authors and not that of the sponsors. The sponsors assume no liability for the contents or use thereof.

This publication may be used for nonprofit education purposes only provided that the source is acknowledged. Requests for permission to copy individual papers should be directed to the appropriate authors.

Table of Contents

All files are available as pdf. To read pdf files, you may need to download the free Adobe Acrobat Reader

Bridges and Structures

Determination of Load Ratings for Non-Composite Steel Girder Bridges Through Load Testing 287 kb
Jeremy Koskie, Mohamed Mekkawy, David White, Iowa State University; Terry J. Wipf, Bridge Engineering Center, Iowa State University

Development of a Low-Cost, Continuous Structural Health Monitoring System for Bridges and Components 495 kb
Yoon-Si Lee, Brent Phares, Terry Wipf, Bridge Engineering Center, Iowa State University

A Bridge Structural Health Monitoring and Data Mining System 400 kb
Ping Lu, Brent M. Phares, Terry J. Wipf, Bridge Engineering Center, Iowa State University; Justin D. Doornink, T.Y. Lin International

Monitoring the Field Performance of Timber Bridges over the Long Term 241 kb
James Wacker, Marc R. Joyal, Joseph F. Murphy, Forest Products Laboratory, USDA Forest Service; Xiping Wang, Natural Resource Research Institute, University of Minnesota, Duluth

Field and Laboratory Studies on High-Mast Lighting Towers in Iowa 347 kb
Robert J. Connor, Greg Callahan, Purdue University; Mike Koob, Wiss, Janey, Elstner Associates, Inc.; Ian C. Hodgson, ATLSS Engineering Research Center; Bruce L. Brakke, Iowa Department of Transportation

A Discussion on the Efficiency of NBI Translator Algorithm 85 kb
Basak Aldemir-Bektas, Omar Smadi, Center for Transportation Research and Education, Iowa State University

Development, Testing, and Application of Precast Paving Notch 16 kb
Michael LaViolette, Bridge Engineering Center, Iowa State University; Dean Bierwagen, Wayne Sunday, Iowa Department of Transportation

Precast, Post-Tensioned Bridge Approach Pavement 18 kb
Dean Bierwagen, Mark Dunn, Iowa Department of Transportation; David Merritt, Transtec Group, Inc.; Michael LaViolette, Brent M. Phares, Adam Faris, Bridge Engineering Center, Iowa State University

Self-Centering Bridge Piers with Structural Fuses 433 kb
Mark C. Currie, Jon M. Rouse, F. Wayne Klaiber, Iowa State University

Evaluation of a Timber Bridge for the Secondary Road System Using FRP Reinforced Glue-Laminated Girders 725 kb
Travis Hosteng, Brent Phares, Terry Wipf, Douglas Wood, Bridge Engineering Center, Iowa State University; Mark Nahra, Delaware County Engineer

FRP Deck Bridge: Design, Construction, and Evaluation as a Temporary Bypass Structure 90 kb
Travis Hosteng, Brent Phares, Douglas Wood, Bridge Engineering Center, Iowa State University

Design of Buchanan County, Iowa, Bridge Using Ultra High Performance Concrete and PI Girders 725 kb
Brian Keierleber, Buchanan County Engineer; Dean Bierwagen, Iowa Department of Transportation; Fouad Fanous, Isaac Couture, Iowa State University; Brent Phares, Bridge Engineering Center, Iowa State University

Early-Age Cracking of Structures: TxDOT’s Experience 22 kb
Ryan Barborak, Elizabeth Lukefahr, Texas Department of Transportation

Accelerated Construction and Innovations for the 24th Street Bridge in Council Bluffs, Iowa 596 kb
Ahmad Abu-Hawash, Norm McDonald, Patricia Schwartz, Iowa Department of Transportation; Brent Phares, Bridge Engineering Center, Iowa State University; Hussein Khalil, HDR, Inc.

Development of a Real-Time Productivity Measurement System for Bridge Replacement 196 kb
Seonghoon Kim, Yong Bai, University of Kansas

Field and Laboratory Study of the Mn/DOT Slab Span System 597 kb
Matthew Smith, Whitney Eriksson, Carol K. Shield, Catherine E. French, University of Minnesota

Construction and Testing of an Accelerated Bridge Construction Project in Boone County 746 kb
Ryan Bowers, F. Wayne Klaiber, Cole Landau, Iowa State University; Samantha  Kevern, Walter P. Moore and Associates; Robert Kieffer, Boone County Engineer; James S. Nelson, Iowa Department of Transportation

Laboratory and Field Testing of Precast Bridge Elements Used for Accelerated Construction 436 kb
Vernon W. Wineland, F. Wayne Klaiber, Iowa State University; Thomas P. Schoellen, Black Hawk County Courthouse

Back to Table of Contents

Drivers

Focus Group Participants’ Understanding of Advance Warning Arrow Displays used in Short-Term and Moving Work Zones 372 kb
Chen Fei See, Steven Schrock, University of Kansas

Measurement of Visual Attention and Useful Field of View during Driving Tasks Using a Driving Simulator 449 kb
Hidetoshi Nakayasu, Yasuhiro Seya, Institute of Intelligent Information and Communications Technology, Konan University; Tetsuya Miyoshi, Toyohashi Sozo University; Nir Keren, Iowa State University; Patrick Patterson, Texas Tech University

The Use of Video Feedback in Rural Teen Driving: An Intervention Study 21 kb
Daniel McGehee, Mireielle Raby, Cher Carney, John D. Lee, Public Policy Center, University of Iowa; Michelle L. Reyes, Cognitive Systems Laboratory, University of Iowa

Braking Behavior at Rural Expressway Intersections for Younger, Middle-Aged, and Older Drivers 82 kb
Shan Bao, Linda Ng Boyle, University of Iowa

Back to Table of Contents

Education and Communication

An Interdisciplinary Approach to Transportation Education 67 kb
Greg Waidley, Jason Bittner, Wisconsin Transportation Center, University of Wisconsin, Madison

Impact of Go!, an Online Magazine About Transportation, on Teens’ Career Plans 732 kb
Michele Regenold, Center for Transportation Research and Education, Iowa State University

Improving Communication on Wisconsin Department of Transportation Construction Projects 148 kb
Gary C. Whited, Construction and Materials Support Center, University of Wisconsin, Madison; Donald J. Miller, Wisconsin Department of Transportation; Matthew J. Grove, Wisconsin Transportation Builders Association

Back to Table of Contents

Environment

Smart Data Collection: Using Custom Forms on a Handheld Smart Phone to Delineate Wetlands 135 kb
Scott R. Mattes, Howard R. Green Company

Cooperative Wetland Mitigation Clearinghouse 323 kb
Duane Smith, Center for Transportation Research and Education, Iowa State University

Regulatory Compliance and Ecological Performance of Mitigation Wetlands in an Agricultural Landscape 18 kb
Terry VanDeWalle, Natural Resources Consulting, Inc.; Kelly Poole, James Miller, Eric Walsh, Iowa State University; Scott Marler, Iowa Department of Transportation; Neil Bernstein, Mount Mercy College; Stephen Main, David McCullough, Wartburg College; Franklin Olsen, Dennis Schlicht, Iowa Lepidoptera Project; Jeffrey Parmelee, Simpson College; Thomas Rosburg, Drake University; Martin St. Clair, Coe College; Craig Chumbley, Earth Tech, Inc.

Field Investigation of Hydraulic Structures Facilitating Fish Abundance and Passage through Bridges in Western Iowa Streams 14 kb
Athanasios Papanicolaou, Dimitrios Dermisis, University of Iowa

The Effects of Headcut and Knickpoint Propagation on Bridges in Iowa 13 kb
Athanasios Papanicolaou, John Thomas, University of Iowa

Back to Table of Contents

Geotech

Embankment Construction QC/QA Using DCP and Moisture Control: Iowa Case History for Unsuitable Soils 307 kb
Brett W. Larsen, David J. White, Charles T. Jahren, Iowa State University

Seasonal Variation in the Subgrade and Base Layers of U.S. Highway 20, Iowa 1.3 mb
Thang Huu Phan, David J. White, Charles Jahren, Iowa State University; Matthew D. Cushman, Terracon Consultants, Inc.

Development of a New Methodology Based on Conductivity Measurements to Detect Presence of Deleterious Fine Particles in Concrete Aggregate 18 kb
Jose Munoz, M. Isabel Tejedor, Marc Anderson, Steven Cramer, University of Wisconsin, Madison

Stabilizing Granular Shoulders with Soft Foundation Soils: Iowa Case Histories 16 kb
Mohamed M. Mekkawy, David J. White, Charles T. Jahren, Muhannad T. Suleiman, Iowa State University; Duane Smith, Center for Transportation Research and Education, Iowa State University

Back to Table of Contents

Operations

Passing Activity on a Recreational Busy Road in Spain: Level and Climbing Sections 13 kb
Manuel Romana Garcia, Universidad Politécnica de Madrid

Turnberry’s Town Square Las Vegas: Elevated Left Turn Access 469 kb
Ken Ackeret, Khalil Amrikani, Molly O’Brien, Kimley-Horn and Associates, Inc.

A Hybrid Approach for Determining Traffic Demand in Large Development Areas 276 kb
XuDong Chai, Reginald R. Souleyrette, Iowa State University; Neal R. Hawkins, Center for Transportation Research and Education, Iowa State University

Traffic Flow Characteristics of a Congested Work Zone in Missouri 16 kb
Reju Radhakrishnan, Ghulam Bham, University of Missouri, Rolla; Carlos Sun, Venkat Chilukuri, University of Missouri, Columbia

Effect of Unmatched Longitudinal Construction Joints and Pavement Markings on Lateral Position of Vehicles 315 kb
Sunanda Dissanayake, Vikranth S. Manepalli, Dean Landman, Eugene R. Russell, Kansas State University

Electronic Speed Feedback Signs as a Rural Community Traffic Calming Measure 16 kb
Eric Fitzsimmons, Shauna Hallmark, Neal Hawkins, Jon Resler, David Plazak, Center for Transportation Research and Education, Iowa State University

Real-Time Traffic Operations Data Using Vehicle Probe Technology 63 kb
Stan Young, University of Maryland

Systematic Evaluation of a Dynamic Late Merge System in Central Missouri 18 kb
Ghulam Bham, Reju Radhakrishnan, University of Missouri, Rolla; Carlos Sun, Venkat Chilukuri, University of Missouri, Columbia

Kansas Department of Transportation’s Experience with Procuring Wi-Fi at Rest Areas 54 kb
Stan Young, University of Maryland; Barb Blue, Kansas Department of Transportation

Iowa Department of Transportation's Statewide DMS Deployment Program 13 kb
Willy Sorenson, Iowa Department of Transportation

Sign Inventory: Legacy vs. New Technology 13 kb
Neal Hawkins, Omar Smadi, Zach Hans, Jon Resler, Center for Transportation Research and Education, Iowa State University

I-95 Corridor Mile Marker and Ramp Designation Signing 21 kb
Jeffrey Konz, Carl Richey, Thomas Schnell, Operators Performance Laboratory, University of Iowa

Using Crash Data as a Measure of Effectiveness in Evaluating Signal Timing Optimizations along Corridors 15 kb
Walter Vodrazka, Jr., Orth-Rodgers and Associates, Inc.

Modification of Driver Behavior Based on Information from Pedestrian Countdown Timers 255 kb
Brandon Bundy, Steven Schrock, University of Kansas

Wisconsin Ramp Metering Operations and Implementation 311 kb
Peter C. Rafferty, Wisconsin Traffic Operations and Safety Laboratory, University of Wisconsin, Madison; Marie Treazise, Wisconsin Department of Transportation

Back to Table of Contents

Pavements

Implementing Percent within Limits for Hot Mix Asphalt 57 kb
Tamer M. Breakah, R. Christopher Williams, Amr Kandil, Jennifer S. Shane, Iowa State University

Laboratory Evaluation and Pavement Design for Warm Mix Asphalt 179 kb
Shu Wei Goh, Zhanping You, Thomas J. Van Dam, Michigan Technological University

Local Calibration for Fatigue Cracking Models in the Mechanistic-Empirical Pavement Design Guide 160 kb
Myungook Kang, Teresa M. Adams, University of Wisconsin, Madison

The Utilization of Agriculturally Derived Lignin as an Antioxidant in Asphalt Binder 62 kb
Nicolaus S. McCready, R. Christopher Williams, Iowa State University

Evaluation of Iowa Climate Data for the Mechanistic-Empirical Pavement Design Guide 221 kb
Michael Heitzman, Iowa Department of Transportation

Effect of Stiffness Ratio on Slippage Cracking Due to Interlayer Bonding Failure in Hot Mix Asphalt Pavement 26 kb
Yusuf Mehta, Nusrat Siraj, Rowan University

Effect of Loading Level and Rate in the Indirect Tensile Test 134 kb
Xinjun Li, R. Christopher Williams, Iowa State University; Mihai O.Marasteanu, University of Minnesota

Performance Prediction and Maintenance of Flexible Pavement 120 kb
Daba S. Gedafa, Kansas State University

New Film Thickness Models for Iowa Hot Mix Asphalt 114 kb
Michael Heitzman, Iowa Department of Transportation

Lessons Learned in Developing a Highway Condition Assessment and Maintenance Quality Assurance Program 110 kb
Emil Juni, Teresa M. Adams, University of Wisconsin, Madison

Cold In-Place Recycling Forensic Study on U.S. Highway 34, Union County, Iowa 56 kb
Michael Heitzman, Iowa Department of Transportation

Evaluation of Long-Term Field Performance of Cold In-Place Recycled Roads 243 kb
Charles T. Jahren, Iowa State University; Hosin “David” Lee, University of Iowa; Don Chen, Ball State University; Jungyong “Joe” Kim, Iowa Department of Transportation

Experiences of Developing and Validating a New Mix Design Procedure for Cold In-Place Recycling Using Foamed Asphalt 912 kb
Yongjoo Kim, Hosin “David” Lee, University of Iowa; Michael Heitzman, Iowa Department of Transportation

Summary of Thirty Years of TxDOT-Funded Research on Coarse Aggregate Issues in Concrete Paving 742 kb
Lianxiang Du, Elizabeth Lukefahr, Texas Department of Transportation

An Overview and Update on TERRA 15 kb
Laurie McGinnis, Center for Transportation Studies, University of Minnesota

Early-Age Smoothness Variations of Jointed Plain Concrete Pavements 127 kb
Sunghwan Kim, Halil Ceylan, Kasthurirangan Gopalakrishnan, Iowa State University

Taking the Bang Out of Transverse Cracks: Fly Ash Slurry Injection Method 79 kb
Victoria Felker, William H. Parcels, Jr., Kansas Department of Transportation

Back to Table of Contents

Planning

Investigation of the Impacts of Rural Development on Iowa’s Secondary Road Systems 18 kb
Chris Albrecht, David Plazak, Susan DeBlieck, Center for Transportation Research and Education, Iowa State University

Minnesota Trunk Highway 10 Anoka County, Iowa Business Stakeholder Involvement Process 18 kb
David Plazak, Chris Albrecht, Center for Transportation Research and Education, Iowa State University; Beth Bartz, SRF Consulting Group, Inc.; Carolyn Braun, City of Anoka, Minnesota; Kate Garwood, Anoka County Highway Department

Routine Highway Maintenance: The Relationship between Cost and Condition 104 kb
Teresa Adams, Emil Juni, Kamal Kannan, David Sokolowski, Midwest Regional University Transportation Center, University of Wisconsin, Madison

Privatization of Transportation Services in Developing Countries 16 kb
Greg Karssen, Reginald Souleyrette, Center for Transportation Research and Education, Iowa State University

Critical Issues in Surface Transportation 14 kb
Richard T. Romer, Orth-Rodgers and Associates, Inc.

Understanding Traffic Impacts of Large-Scale Traffic Events 21 kb
Hillary Isebrands, Neal R. Hawkins, Center for Transportation Research and Education, Iowa State University

Building a National Freight Policy 64 kb
Ernie Wittwer, Wittwer Consulting, Inc.

What the Public Sector Needs to Know about Logistics and Freight Management 43 kb
Xiubin Wang, National Center for Freight and Infrastructure Research and Education, University of Wisconsin, Madison; Jason J. Bittner, Wisconsin Transportation Center, University of Wisconsin, Madison; Ernie Wittwer, Wittwer Consulting, Inc.

Freight Planning at Small MPOs: Current Practices and Challenges 272 kb
Jennifer Blonn, Christopher Dresser, Kanisa Rungjang, Jessica Y. Guo, Teresa M. Adams, National Center for Freight and Infrastructure Research and Education, University of Wisconsin, Madison

Adding Spatial Data to Existing Information Systems 13 kb
Eric Abrams, Iowa Department of Transportation

Discussion of the Iowa Department of Transportation’s Linear Referencing System 13 kb
Steve Kadolph, Iowa Department of Transportation

Scheduling Specification for the Rehabilitation and Reconstruction of I-235 243 kb
Elizabeth Thoma, Cole Landau, Charles Jahren, Iowa State University

An Emerging Development Pressure Index for Corridor Planning 285 kb
Jessica Y. Guo, Dadit G. Hidayat, National Center for Freight and Infrastructure Research and Education, University of Wisconsin, Madison; David Cipra, Wisconsin Department of Transportation

Deploying Hybrid Electric School Buses in Iowa 30 kb
Shauna Hallmark, Dennis Kroeger, Center for Transportation Research and Education, Iowa State University

City of Ames, Iowa, Quiet Zone Assessment 21 kb
Andrew Mielke, SRF Consulting Group, Inc.

Review of Demand Modeling Methodologies for Air-Related Transportation: An Institutional Challenge to Intermodalism 59 kb
Xiubin Wang, National Center for Freight and Infrastructure Research and Education, University of Wisconsin, Madison; Lei Yu, Texas Southern University

Back to Table of Contents

Safety

Overview of SafetyAnalyst Software 72 kb
Karen Richard, Darren Torbic, Douglas Harwood, Midwest Research Institute

Safety Effects of Offset Right-Turn Lanes at Rural Expressways 564 kb
Joshua L. Hochstein, Tom Maze, Center for Transportation Research and Education, Iowa State University; Thomas M. Welch, Iowa Department of Transportation; Howard Preston, Richard Storm, CH2M Hill

Developing Guidance for Use of Lighting on Rural Roadways 16 kb
Cari Kinzenbaw, Shauna Hallmark, Zach Hans, Neal Hawkins, Omar Smadi, Center for Transportation Research and Education, Iowa State University

Thirteen County Road Safety Audit Reviews: Lessons Learned 18 kb
Howard Preston, CH2M Hill

A Full Bayesian Assessment of the Effects of Highway Bypasses on Crashes and Crash Rates 222 kb
Lorenzo Cena, Nir Keren, Wen Li, Iowa State University

Overview of the Strategic Highway Safety Planning Process 18 kb
Howard Preston, CH2M Hill

A Clearly Defined Methodology for Analyzing the Crash History for a Given Location or Corridor 16 kb
Tim Simodynes, Michael Pawlovich, Iowa Department of Transportation

Centerline Curbing Treatment at Railroad Crossings for Improved Safety 181 kb
Gregory A. McKnight, Aemal J. Khattak, University of Nebraska, Lincoln

Minnesota CSAH 42: A Case Study Illustrating Traffic Signal Removal as an Access Management Strategy 676 kb
David Plazak, Center for Transportation Research and Education, Iowa State University; Howard Preston, CH2M Hill

Pavement Marking Management: Local Agency Practices 18 kb
Daniel Ormand, Jon Resler, Omar Smadi, Neal Hawkins, Center for Transportation Research and Education, Iowa State University

An Evaluation of the Relationship between the Seat Belt Usage Rates of Front Seat Occupants and Their Drivers 115 kb
Vinod Vasudevan, University of Nevada, Las Vegas;Shashi Nambisan, Center for Transportation Research and Education, Iowa State University

The 70 mph Speed Limit: Speed Adaptation, Spillover, and Surrogate Measures of Safety 365 kb
Victor Lund, Iowa State University; Reginald Souleyrette, Thomas Stout, Center for Transportation Research and Education, Iowa State University

Speed Limit-Related Issues on Gravel Roads 286 kb
Litao Liu, Sunanda Dissanayake, Kansas State University

Evaluating the Effectiveness of Continuous Shoulder Rumble Strips in Reducing Single-Vehicle Ran-Off-Roadway Crashes in Nevada 88 kb
Shashi Nambisan, Center for Transportation Research and Education, Iowa State University; Mukund Dangeti, Ashok Singh, University of Nevada, Las Vegas; Vinay Vanpalli, Stantec, Inc.

Analysis of Run-Off-Road Crashes in Relation to Roadway Features and Driver Behavior 87 kb
M. Ertan Örnek, Traffic Operations Laboratory, University of Wisconsin, Madison; Alex Drakopoulos, Marquette University

Effectiveness of Iowa's Automated Red Light Running Enforcement Programs 16 kb
Eric Fitzsimmons, Shauna Hallmark, Thomas McDonald, Center for Transportation Research and Education, Iowa State University

Effect of Concrete Pavement Surface Texture on Traffic Safety: Longitudinal or Transverse Tines? 77 kb
Alex Drakopoulos, Marquette University; M. Ertan Örnek, Traffic Operations Laboratory, University of Wisconsin, Madison

Assessment of Channelizing Device Effectiveness on High-Speed/High-Volume Roadways 198 kb
Reginald Souleyrette, Tom McDonald, Dennis Kroeger, Center for Transportation Research and Education, Iowa State University

Determining the Effectiveness of Temporary Traffic Control Measures in Highway Work Zones 94 kb
Yingfeng Li, Yong Bai, University of Kansas

Temporary Traffic Control Enforcement of Traffic Laws in Closed Road Sections 60 kb
Cole Landau, Kelly Strong, Iowa State University; Thomas McDonald, Center for Transportation Research and Education, Iowa State University

Investigating the Human Factors Involved in Severe Crashes in Highway Work Zones 105 kb
Yingfeng Li; Yong Bai, University of Kansas

Back to Table of Contents

Weather

Performance Measures for Snow and Ice Control Operations 69 kb
Thomas Maze, Chris Albrecht, Dennis Kroeger, Center for Transportation Research and Education, Iowa State University

Evaluation of Virtual Reality Snowplow Simulator Training 140 kb
Christopher Masciocchi, Veronia J. Dark, Derrick Parkhurst, Iowa State University

Using Driving Simulators to Train Snowplow Operators: The Arizona Experience 296 kb
Mary Kihl, Peter J. Wolf, Arizona State University

Evaluation of Multiple Blade Snowplow Designs 46 kb
Sheri Anderson, Dennis Burkheimer, Jim Dowd, Tina Greenfield, Iowa Department of Transportation

Utilizing Wireless Data Network for AVL and Mobile RWIS 795 kb
Bob McCullouch, Wonjin Kang, Michelle Leung, Purdue University; Jay Lee, Purdue University, Calumet

Weather Information for Surface Transportation (WIST): Update on Weather Impacts and WIST Progress 144 kb
Samuel P. Williamson, Office of the Federal Coordinator for Meteorological Services and Supporting Research; Frank L. Estis, Science and Technology Corporation

Determining Practical Standing-Corn Snow Fence Configuration through the Evaluation of Drift Characteristics 25 kb
Sheri Anderson, Dennis Burkheimer, Jim Dowd, Tina Greenfield, Iowa Department of Transportation

Back to Table of Contents

Sponsors

Committee

  • John Adam, Director, Statewide Operations Bureau, Iowa Department of Transportation
  • James Alleman, Professor and Chair, Department of Civil, Construction, and Environmental Engineering, Iowa State University
  • Steve Andrle, Transportation Research Board
  • Jason J. Bittner, Deputy Director, Wisconsin Transportation Center, University of Wisconsin, Madison
  • Linda Boyle, Assistant Professor of Mechanical and Industrial Engineering, University of Iowa
  • Tom Cackler, Director, National Concrete Pavement Technology Center, and Associate Director of Construction Research and Advanced Technology, Center for Transportation Research and Education, Iowa State University
  • Carol Culver, Research Coordinator, Research and Technology Bureau, Iowa Department of Transportation
  • Mark Dunn, Operations Research Engineer, Research and Technology Bureau, Iowa Department of Transportation
  • Robert Ettema, Professor of Hydraulics, Hydrology, and Water Resources and Chair, Department of Civil and Environmental Engineering, University of Iowa
  • Todd Fonkert, Bremer County Engineer
  • Dave Forkenbrock, Professor of Urban and Regional Planning and Director, Public Policy Center, University of Iowa
  • Lowell Greimann, Center for Transportation Research and Education, Iowa State University
  • Max Grogg, Programs Engineer, Federal Highway Administration, Iowa Division
  • Paul Hanley, Assistant Professor of Urban and Regional Planning and Director, Transportation Policy Research Program, Public Policy Center, University of Iowa
  • Neal Hawkins, Associate Director of Traffic Operations, Center for Transportation Research and Education, Iowa State University
  • David Johnson, Manager, Minnesota Road Research, Minnesota Department of Transportation (Retired)
  • Gerald Kennedy, Assistant Division Administrator, Federal Highway Administration, Iowa Division
  • Aemal Khattak, Associate Professor of Transportation Engineering, University of Nebraska
  • Sandra Larson, Director, Research and Technology Bureau, Iowa Department of Transportation
  • David Lippert, Engineer of Physical Research, Illinois Department of Transportation
  • Sue Lodahl, Director of Research Services, Office of Investment Management, Minnesota Department of Transportation
  • Thomas Maze, Professor of Civil Engineering and Director, Midwest Transportation Consortium, Iowa State University
  • Dick McReynolds, Engineer of Research, Kansas Department of Transportation
  • Shashi Nambisan, Director, Center for Transportation Research and Education, Iowa State University
  • Charlie Nemmers, Director, Transportation Infrastructure Center, University of Missouri, Columbia
  • David Plazak, Education Director, Midwest Transportation Consortium, Iowa State University
  • Laurence Rilett, Professor of Civil Engineering and Director, Mid-America Transportation Center, University of Nebraska, Lincoln
  • Vernon Schaefer, James M. Hoover Chair in Geotechnical Engineering, Professor of Civil, Construction, and Environmental Engineering, Iowa State University
  • Roger Schletzbaum, Marion County Engineer
  • Steven Schrock, Assistant Professor of Civil, Environmental, and Architectural Engineering, University of Kansas
  • Lee Smithson, Coordinator, Snow and Ice Cooperative Pooled Fund Program, American Association of State Highway and Transportation Officials, Iowa Department of Transportation
  • Reg Souleyrette, Gerald and Audrey Olson Professor of Civil Engineering and Associate Director, Center for Transportation Research and Education, Iowa State University
  • Tim Strauss, Associate Professor of Geography, University of Northern Iowa
  • Thomas Welch, State Transportation Safety Engineer, Office of Traffic and Safety, Iowa Department of Transportation
  • Terry Wipf, Professor of Civil, Construction, and Environmental Engineering and Director, Bridge Engineering Center, Iowa State University