State and Local Partnership in Research for Transportation Development

The Iowa Department of Transportation collaborates with state and local partners through the Iowa Highway Research Board to oversee funding and conduct research programs focusing on various areas including pavement management, bridge standards, and traffic safety. The program involves county engineers, Iowa DOT representatives, city engineers, and university members to address challenges and innovate solutions for transportation infrastructure development.

• Research
• Transportation
• Iowa DOT
• Infrastructure development
• Highway research

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1. State and Local Partnership in Research IOWA DEPARTMENT OF TRANSPORTATION

2. OUTLINE IHRB RESEARCH PROGRAM OVERVIEW COUNTY ENGINEERS RESEARCH FOCUS GROUP SHORT SPAN PRECAST BRIDGE STANDARDS

3. Research PROGRAM OVERVIEW

4. IOWA HIGHWAY RESEARCH BOARD 1949 Legislature established the Secondary Road Research Fund in the Iowa Code Iowa DOT has oversight of the funds Highway Commission allocated funding for Primary Road Research IHRB advisory board to the DOT 1989 Legislation allocates municipal funds for city

5. IHRB 15 members 7 County Engineers 4 Iowa DOT 2 City Engineers 2 University Representatives Alternate members

6. BREAKDOWN FUNDING SOURCES IHRB (State) ~ $2.2M ~ $1.2M County ~$750K State ~$200K City

7. FOCUS OF RESEARCH PROGRAM Areas of Research: Aggregate and Geotechnical Pavement Management/Engineering Data R.O.W/Roadside Management Hydraulics/Hydrology/Drainage Materials Maintenance Pavements Policy, Specs, Economic, Legal Bridges and Structures Social/Environmental Traffic and Safety, Operations

8. COUNTY ENGINEERS RESEARCH FOCUS GROUP

9. GOALS To provide a forum to share day to day challenges - Round Table Discussions Share low-cost, innovative solutions to meet these challenges Brainstorm and prioritize ideas for possible research projects IHRB

10. STANDARDS FOR SHORT SPAN BRIDGES Standards for abutments for precast bridges Standards for abutments for precast bridges Scope of the project evolved to include other Scope of the project evolved to include other precast elements to creating a set of standards precast elements to creating a set of standards for complete precast short span bridges. for complete precast short span bridges.

11. SHORT SPAN BRIDGES 24'-0 to 30'-0 wide roadway Skews 0 -0, 15 -0, and 30 -0 Span Lengths 30 -0, 40 -0, 50 -0, 60 -0, 70 -0 Precast Concrete beams (prestressing only in spans which require it) Consider voided box beams Consider the weight of the beams due to concerns with moving and placing the beams when weights start to exceed 45,000 lbs. Beams could be strengthened transversely with threaded rod. Precast abutments as well as details for option to do cast-in-place abutments on pile foundations.

12. TR TR- -663 Standards Standards 3 phases Consultant Develop Concept Consultant Develop Concept ISU Bridge Center to test any details if needed ISU Bridge Center to test any details if needed Develop Full set of standards Develop Full set of standards 663 Short Span County Precast Bridge Short Span County Precast Bridge 3 phases

13. THANKS! Vanessa Goetz Secondary Road Research Research and Analytics, Iowa DOT 515-239-1382 Vanessa.goetz@dot.iowa.gov