Pavement Preservation in Hillsborough County, Florida. Roger Cox, P.E. Department of Public Works Transportation Infrastructure Management

Transcription

1 Pavement Preservation in Hillsborough County, Florida Roger Cox, P.E. Department of Public Works Transportation Infrastructure Management

2 Definition: Pavement Management is the process of overseeing the maintenance and repair of a network of roadways at or above established values, within budget constraints, while meeting customer expectations. This is ideally accomplished by doing more with less, until you can do everything with nothing.

3 Discussion Points Hillsborough s Inventory Balancing Act GASB34 Customers Budgets Pavement Process Tools of the Trade Inspections Planning Treatments Performance and Outcome Future Prediction Modeling Curves Questions

4 Hillsborough Inventory/Budget 6,993 lane miles Rural to major arterials 4 lane miles of rigid pavement Essentially zero dirt roads Budget; FY $7.1 M Gas Tax: $3.6M CIT: $3.5M (FY12=$0?) Ad Velorem: $0 49% decrease in funding Budget FY2009; $13.9M GASB34 Compliant 2000 PCI to be maintained above 55 (0-100), BOCC adopted Adopted ASTM Standard D Sept 17, 2008

5 The Balancing Act GASB34 Budget Customer Satisfaction

6 The Balancing Act GASB34 Budget Customer Satisfaction

7 The Balancing Act GASB34 Budget A Management Process can help facilitate this. Customer Satisfaction

8 The Pavement Management Process Accomplished by 1-Inspecting all road segments 2-Planning for projects based on budget and need 3-Implementation of appropriate treatments and evaluate performance

9 The Pavement Process Our Tools!!! Inspections Planning Implementation Based on Performance

10 Tools of the Trade- Step 1 - Inspections Inspections Have Requirements Inspect ALL of the roads every three years (GASB34 requirement) Annual report on Overall PCI Overall PCI is to be above 55 (Hillsborough) Inspections may require third party verification Audit may require evidence of change in PCI for treatment applied Evidence of established procedures

11 Inspection - Specifics Hillsborough Adopted ASTM , using MicroPAVER (USACOA) as pavement management database/software Scale 19 Defects (cracking, rut, ravel, edge etc.) Visual Inspections does not use IRI as an index

12 Tools of the Trade- Inspections Hillsborough Pavement Inspection Vehicles Began development of Pavement Inspection Vehicle (PIV) in Vehicle collects visual distress as measured by an inspector Onboard GIS/GPS enabled databases capable of geo-referenced images All data is uploaded to MicroPAVER database for calculation of PCI and modeling of pavement conditions.

13 Hillsborough Pavement Inspection Vehicles

14 Hillsborough Pavement Inspection Vehicles

15 Hillsborough Pavement Inspection Vehicles

16 Hillsborough Pavement Inspection Vehicles - Inspection Samples

17 Hillsborough Pavement Inspection Vehicle - Inspection Samples

18 MicroPAVER Inspection Database Hillsborough Pavement Inspections Originally developed in the late 1970s to help the Department of Defense (DOD) manage M&R for its vast inventory of pavements. Continued support by the USACOE, and a user base of over 600 internationally. Training available through vendors and APWA. Available databases include MS ACCESS. Customizable and capable of handling large inventories. Customizable deterioration curves as well as definitions for M&R, and Global treatments Modeling capability with budget and PCI forecasting Public domain program.

19 MicroPAVER - PMS Hillsborough Pavement Inspections

20 MicroPAVER Hillsborough Pavement Inspections PCI for section

21 MicroPAVER Hillsborough Pavement Inspections

22 MicroPAVER Hillsborough Pavement Inspections Work History and PCI Increase Due To Project

23 Tools of the Trade Step 2 - Planning Create groups of Projects based on treatment and fiscal Year A group is a list of roads that will be treated in any given fiscal by a given treatment based on: Condition Budget Strategy (i.e. pavement philosophy) Worst First (bring lots of cash!! Which one is worst?) Last Year s Budget Standard Program (time re-occurance, i.e. Treat Every 7 years) Fighting Fires (citizen driven) Political Pressure (Political considerations to establish priorities) Gut Feel

24 Tools of the Trade Step 2 - Planning Create groups of Projects based on treatment and fiscal Year A group is a list of roads that will be treated in any given fiscal by a given treatment based on: Condition Budget Strategy -Hillsborough Strategy - KEEP THE GOOD ROADS GOOD! Worst roads are to be budget for and placed in a Fiscal Year. After all..dead is dead! Two Year Budget However, old numbers die hard. Treatment is Based on Condition Spatial Components are Considered Do not separate neighborhoods Priority Given to Arterials Treatments Used Must Increase PCI Includes An Orphan Contingency County Forces Paving Lowest PCI Roads with a Global Treatment have Priority

25 Tools of the Trade - Planning What Does It Do? RAPP MAPP and Tools

26 RAPP- Yeah. What is That??? Data window that creates and displays pavement management project groups based on selections made from a spatial environment

27 RAPP Data Window consists of a map, and a data screen These two work together

28 RAPP DATA SCREEN

29 Tool Bar

30 RAPP MAPP Serves as a graphical Window for: Selecting roads into groups Displaying groups Obtaining linear data Displaying Aerials Obtaining Activity Data

31 RAPP MAPP Aerial Photo Toggle

32 RAPP MAPP Selection Tool

33 RAPP MAPP Selected Road Segments

34 Tools of the Trade Step 3 Implementation / Evaluations Hillsborough Treatments (Current) Crackseal Microsurface Micropave Hot in Place Repaving Overlay Mill and Overlay Full Depth Reclamation Conventional Reconstruction

35 Tools of the Trade Hillsborough Treatments Crackseal With Micro, Overlay Microsurface (Single-Dbl) Micropave (sp4.74 w/76-22) Hot in Place Repaving (single pass virgin lift) Overlay (SuperPave) Mill and Overlay (Wedge Mill) Full Depth Reclamation Conventional Reconstruction

36 Tools of the Trade Implementation/Treatments Right Treatment Right Time AND What Was The Benefit? What defect can the treatment resolve, What is the additional life?

37 PCI Defect(s) 100 No Defects 93 % Ravel L 83 Ravel L 72 Block Cr Only 70 Ravel L, % Long and T 67 Ravel L, Block 56 Ravel M 48 Ravel M, Block 40 Ravel M, Lane Drop, Rutting 24 Ravel M, Block, Polished 23 Ravel Heavy 17 Ravel M, 50% Allig, Block, Potholes 9 Ravel M, Lane Drop, Edge Cr, Potholes

38 Tools of The Trade - Treatments 100 PCI Ravel-L, L&T 72-Block 67-Ravel-L, L&T 50 (Min acceptable) 25 Additional Life $/SY-Year Years

39 Tools of The Trade - Treatments 100 PCI 75 (Min acceptable for Arterials) 83- Ravel, L 70- Ravel L, Long Cr Ravel-M, Block L 25 Additional Life - $/SY-Year (min.) Years??

40 Tools of The Trade - Treatments PCI (Min acceptable for Arterials) Hillsborough s Oldest FDR 83- Ravel,L 70- Ravel L, Long Cr 50 Ravel-M, Block L Ravel-M, Alligator,Rut Additional Life - $/SY-Year (min.) Years??

41 Tools of The Trade - Treatments What defect the treatment resolves, and how is that measured? PCI Ravel,L (Min acceptable for Arterials) 70- Ravel L, Long Cr Ravel-M, Block L 29 Ravel-M, Alligator,Rut Two Different Treatments With the same additional life BUT NOT THE SAME COST! Additional Life - $/SY-Year (min.) Years??

42 Tools of The Trade - Treatments New Construction 10 years old Hot in Place Repaving 13 years old

43 Tools of The Trade - Treatments If you misdiagnose the treatments, it will cost you Micro Surface- 3 years old Micro Surface 3 years old

44 Tools of The Trade Treatments Hillsborough s Cost To Own Micro-Surface - Local Road Treatment Average life added= 5 to 7 years Annualized cost = $0.56 to $0.40 per SY - Year Micro-Pave (SP4.75) Local Road Treatment Average life added= 10 to 13 (est) years Annualized cost = $0.40 to $0.31 per SY - Year Hot- in- Place Re-Paving - Arterials (mostly) Average life added = 13 plus years (possible) Annualized cost = $0.53 per SY- Year Mill and Resurface (2 inches) SP12.5 (Arterials) Average life added = 15 plus years (possible) Annualized cost = $0.79 per SY- Year

45 Tools of The Trade Treatments Hillsborough s Cost To Own Micro-Surface Annualized cost = $0.56 to $0.40 per SY - Year Micro-Pave (SP4.75) Annualized cost = $0.40 to $0.31 per SY - Year Hot- in- Place Re-Paving Annualized cost = $0.53 per SY- Year Mill and Resurface (2 inches) SP12.5 Annualized cost = $0.79 per SY- Year Must utilize the correct treatment on the correct road to meet overall program goals! Treatment selection is a function of defect, and function class.

46 Future Prediction Modeling Curves

47 Prediction Modeling Curves

48 Prediction Modeling Curves Micro Paver Deterioration Curve (Hillsborough Model)

49 Prediction Modeling Curves Metro Nashville Deterioration Curve

50 Prediction Modeling Curves Micro Paver Deterioration Curve (Hillsborough Model)

51 Pavement Preservation in Hillsborough County, Florida Roger Cox, P.E. Department of Public Works Transportation Infrastructure Management