1. Maintenance Considerations in Design
Michael J. Kennerly P.E.
Director of the Office of Design
Iowa Department of Transportation

2. Key Considerations when Designing for Maintainability
Maintenance Policy
Maintenance Staff
In-House
Outsourced
Type of Equipment
Maintenance Budget
Rehabilitation Program
Climate

3. Water, Water, Water

4. How Water Influences Design and Maintenance
Water Management Affects
Pavement Design
Shoulder Design
Subgrade Treatment
Horizontal alignment
Subdrain
Ditching
Landscaping

5. Pavement Design
Typical Cross Section for 4-Lane Divided Highway

6. Pavement Design Pavement Design Thickness Subgrade Treatment
Type HMA vs PCC
Porous Pavement
Rehabilitation Strategy

7. Shoulder Design
Material
Width
Subgrade
Subdrain
Interface

8. Rehabilitation Strategies

9. Rehabilitation Strategies
HMA Resurfacing Option:

10. Roadside Design
Typical Ditch Section

11. Roadside Design
What is The problem?

12. Roadside Design
Snow Borrow

14. Roadside Features
Light poles