1. 1 An Integrated GIS approach to Municipal Pavement Management Presented By: Jeff Steele, City of Greensburg Michael Bieberitz, GISP, HNTB Corporation

2. 2 Intro Here’s the Problem: The city of Greensburg Streets Department needed a way to: Determine if the same streets were being paved more often than necessary. Track historic project and material costs. Estimate future project costs from assumptions based upon user input. (currently, this is done manually through a paper-based system.) An Integrated GIS approach to Municipal Pavement Management

3. 3 GLANCE+ City has a great GIS resource in use by some of other departments called GLANCE+ Already in use by the city departments for several purposes

4. 4 GLANCE+ Sanitary

5. 5 GLANCE+ Water Utilities

6. 6 GLANCE+ Stormwater

7. 7 Is there a way to adapt existing technology for new uses?

8. 8 The Challenge Develop a way to display and track projects from many years that can exist on the same piece of pavement. Use existing GIS layers wherever possible. Incorporate new street application into existing GLANCE+ The Challenge

9. 9 Challenge: How do we get so many projects to live on the same piece of road? –Data Storage –Display Solution: cross-reference table.

10. 10 The Challenge Challenge: Greensburg centerline file –Street segments generally stretch from intersection to intersection. –City discovered that many past projects didn’t extend entirely from intersection to intersection. How do we get an accurate cost estimate? Solution: split lines into smaller segments. What We Learned Along the Way

11. 11 The Challenge Challenge: Splitting segments causes other problems. –Sometimes the entire segment is already part of another project. Solution: Track split segments so they can be related to each project.

12. 12 The Solution What Does the application Look Like? Select road segments on a map

13. 13 The Solution Enter a few variables: –Width –Asphalt Cost Historic prices of asphalt are also kept. –Utilities that could affect project costs

14. 14 The Solution Form returns values for –Estimated tonnage –Estimated tack cost –Estimated total cost

15. 15 Results City entered projects from last five years to test accuracy of the product Actual cost and tonnage of material used versus what software estimated 130 projects completed between 2000 and 2005 Results

16. 16 Results

17. 17 Results Average Tack Coat Tonnage Used: –Estimated:234.08 –Actual:221.90 –Difference:+12.18 –% Difference:5.4% Average Project Cost: –Estimated:$8605 –Actual:$8095 –Difference:+$510 –% Difference:6.3% Summary Results for all 130 Projects

18. 18 Results Findings: –Costs are a little inflated because centerline file stretches from center of intersection to center of intersection. –Projects are usually edge to edge, so we overestimate by about 5%. –Only 17 segments of road (totaling 1.22 miles) were paved more than once in the last five years.

19. 19 Questions