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Cartegraph OMS Pavement Inspection Methods

This document serves as a collection of the various Pavement Inspection Methods within OMS. In the Related or Appended Entries section, you'll find a list of all the different Pavement Methods, Examples, Reports, Inspections, and Classification processes. 

Pavement Inspection Methods

With pavement you have many ways to manage assets from tracking attribute data, historical information, entering inspections, and controlling maintenance. Cartegraph has two ways to inspect Pavement, Cartegraph’s Standard inspections or for asphalt and concrete roads—Pavement Condition Index (PCI) inspections.

PCI is a numerical indicator that rates the surface condition of pavement. The PCI provides a measure of the present condition of the pavement based on the distress observed on the surface of the pavement, which also indicates the structural integrity and surface operational condition. It provides an objective and rational basis for determining maintenance and repair needs and priorities. Continuous monitoring of the PCI is used to establish the rate of pavement deterioration, which permits early identification of major rehabilitation needs. The PCI provides feedback on pavement performance for validation or improvement of current pavement design and maintenance procedures. 

NOTE: An enterprise license is required for PCI inspections.

The calculations provided in the startup data are not Cartegraph specific. 

The data is pulled from:

  • ASTM D-6433-11 (American Society for Testing and Materials)
  • ASHTO (American Association of State Highway and Transportation Officials)       
  • FHWA (Federal Highway Administration)
  • USACE (United States Army Corps of Engineers).

Inspection and Condition Setup Overview

  1. Setup Condition Categories and assign a weight to each condition category.

Condition categories are the asset’s characteristics observed during inspections and used to estimate asset deterioration. Or the parts and features of the asset that affect the condition of the asset. 

The weight indicates the effect of the condition category in the OCI. Your organization probably thinks the condition of the Support Condition is the most important characteristic of the asset, and Color the least. Assign the weights as 10, 5, and 1 or 60, 30, and 15. You determine the scale.

Learn more About Condition Categories.

Optional:  With the Advanced Asset Extension, additional Condition Category Types and Condition Details can be defined.

The following steps are only available with the Advanced Asset Extension.

  1. Setup Impacts for condition categories by selecting activities and defining their impact. 

An asset's condition is affected by the activities performed on it. By adding impacts for those activities, the asset's estimated condition will properly reflect the work completed on the asset.

Learn more About the Activity Impact on Asset Condition.

  1. Setup Prediction Groups with individual curves for each condition category.

The Performance library contains deterioration data used to predict the asset’s OCI and remaining life. Prediction groups are a family of assets that deteriorate in similar ways and are affected by condition categories in the same way.

Learn more About Prediction Groups.

  1. Setup Condition Groups.

After setting up individual curves, review the OCI performance curve for each prediction group to understand asset deterioration. Use that information to determine minimum acceptable conditions and setup Condition Groups. 

The Minimum Condition establishes the point an asset is considered below the minimum acceptable condition—or failure point for a group of similar assets.

Learn more About Condition Groups.

  1. Verify the asset records have Installed date or Replaced date,  Prediction Group, and Condition Group to ensure Estimated OCI can be calculated.

The Installed Date or Replaced Date is populated on an asset when an Install or Replace task is completed for the asset. 

The Prediction Group and Condition Group are populated on an asset based on the filters defined for Prediction and Condition Groups. Verify data in the Prediction Group and Condition Group filters are populated in the asset records so the correct groups are associated to the record.

Learn more about Estimated OCI Calculations.

About Functional Classifications

The data in this library characterizes a pavement grouping based on its physical attributes such as lane, shoulder, right-of-way, and type of traffic it carries. For example, arterial or residential.

NOTE: Each Pavement ID requires a functional classification to calculate the correct inspection information for the estimated OCI.

About Pavement Classification

The data in this library characterizes the segment’s pavement type. For example, brick and block, asphalt, or concrete.

NOTE: Each pavement requires a pavement classification to calculate the correct inspection information for the estimated OCI.  Each Pavement Classification needs to fall into a prediction group.

About Condition Groups

You must have a Cartegraph OMS advanced feature extension to access this feature.

This functionality is found in the Cartegraph Administration>Asset Condition Manager.

  • A Condition Group establishes the point an asset is considered below the minimum acceptable condition or failure point. Assign an asset to a condition group based on the filter.
  • When an asset reaches its minimum condition, it is considered to have no remaining life. The Act Before field displays the date an asset’s OCI goes below the minimum index as defined by the asset's assigned Condition Group.
  • The Minimum Index is the lowest point at which the condition is deemed acceptable. If the index calculation results in a value lower than this, the condition is unacceptable.
  • Minimum Rating identifies the rating of the minimum index.
  • The filter text lets you define the group of assets a Condition Group applies to. You cannot enter anything in the Filter Text field. This field displays the results of the advanced filter you create. For example, roadways with the same functional classification may have the same minimum acceptable condition.  Create a Pavement condition group named Rural Arterial.  Click Filter and create the filter Functional Classification is equal to Rural Arterial.

NOTE: For Sign Condition Groups, additional fields are available to set the asset's minimum acceptable condition based on sign retroreflectivity ratings. Fields include Minimum Legend Ra, Minimum Background Ra, and Minimum Contrast Ratio.

About the Activity Impact on Asset Condition

You must have a Cartegraph OMS advanced feature extension to access this feature.

NOTE: This relates to Signs only without the advanced feature extension, or for any asset with the extension.

Corrective or preventative maintenance activities are performed to extend the asset’s life. The Asset Condition Categories/Impact library contains the impact of activities that extend the asset’s life. The activity’s impact is calculated to update that individual condition category.

For example, a park bench with condition categories of Aesthetics, Structure, and Surface.

The following shows which activity impacts a condition category:

Activity

 

Condition Category

Paint

Impacts

Aesthetics

Realignment

Impacts

Structure

Stain

Impacts

Surface

  • Activity impacts affect the individual condition category and increase the asset’s overall condition rating (OCR).
  • Impacts are expressed as:      
  • Absolute—resets the overall condition index (OCI) to the number indicated       
  • Relative—increases the index by the number indicated       
  • %— increases the index by the percent indicated     

For example, an asset has a Condition Category index of 50. A maintenance activity is performed with an impact factor of 75%. The estimated index for the condition category increases by 75% to 87.5.

About Pavement Detailed Distress Observations

The Distresses library data is based on the U.S. Army Corps of Engineers Pavement Maintenance Management System.  Use this library of data to view the information and illustrations for detailed distress inspections.

The calculations for the distress condition category and pavement/pavement area OCI are based on the data and methods described in the U.S. Army Corps of Engineers Pavement Maintenance Management System.

NOTE: The Pavement or Pavement Area Length and Pavement/Pavement Area Width must be populated to calculate the distress index.

The data entered represents the percent of the sample affected by the distress:

For example, if you have a distress of Rutting Affects for 250 ft2 of a 1000 ft2 sample. This represents 25 percent of the sample.  This calculates the portion of the sample affected by the distress and enter that value: in this case 250/1000 or 25 for 25 percent.

About PCI Inspections

The Pavement Condition Index (PCI) is a numerical indicator that rates the surface condition of the pavement. The PCI provides a measure of the present condition of the pavement based on the distress observed on the surface of the pavement, which also indicates the structural integrity and surface operational condition. It provides a objective and rational basis for determining maintenance and repair needs and priorities. Continuous monitoring of the PCI is used to establish the rate of pavement deterioration, which permits early identification of major rehabilitation needs. The PCI provides feedback on pavement performance for validation or improvement of current pavement design and maintenance procedures.

This feature requires a Cartegraph OMS license.

Pavement Detailed Distress Index Calculations

The calculations of the index for the Distress condition category are based on the data methods and described in the U.S. Army Corps of Engineers Pavement Maintenance Management System and ASTM D-6433-11 Standard Practice for Roads and Parking Lots Pavement Condition Index Surveys.

For each distress record the deduct points are determined. The contents of the extent and severity fields are interpolated with the deduct points table for that distress. Distress information is stored in the Distresses library.

Pavement Distress Index Calculation Example

The following information is entered for a sample:

  • Distress: Asphalt Alligator Cracking
  • Severity: Moderate       
  • Extent: 5 (five percent of the sample is affected with this condition)
  • Deduct Points: 25       
  • Is the Deduct Value >2? Yes = 1 (Determine Q)

The Corrected Deduct Value is calculated using the Deduct Total Value and Q value on the chart shown below. A count of distresses with deduct value that is greater than 2 is stored as Q.  If no deduct values or only one deduct value is over 2, then the total deduct value is used to calculate the distress index. If there is more than one deduct value >2, then the number of deduct values to use is determined:

The value for a sample’s total Corrected Deduct Value (CDV) and Q value is show on the Corrected Deduct Values table. This number represents the distress index for the sample.

Distress

Severity

Extent

Deduct Values

Is Deduct Value >2?
Yes=1 (Determine Q)

Asphalt Alligator Cracking

Moderate

5

25

1

Asphalt Block Cracking

Low

20

13

1

Asphalt Edge Cracking

Low

0.2

1.75

0

Total Deduct Value

 

39.75

Q2

Corrected Deduct Value                

 

 

27.25                

\

  • The Deduct Value is determined off of the total of the items shown in the Is Deduct Value >2? column. Becuase the sum is 2, the Q value is Q2.
  • The Asphalt Alligator Cracking and Asphalt Block Cracking Determine Q column shows 1 because their deduct values, 25 and 13, are greater than 2.
  • The Asphalt Edge Cracking Determine Q column shows 0 becuase the deduct value is 1.7, less than 2. 

This chart shows how the Corrected Deduct Value (CDV) value is determined based on the Q2 curve as shown below.

About Pavement Corrected Deduct Values

The Pavement Corrected Deduct Value table displays for the selected Pavement Classification.

The total deduct value is the sum of the deduct point for all of the distresses in a sample. Q1,Q2,Q3, etc. represents the number of distresses in the sample that have a deduct value over 2.

The value for a sample total deduct value and Q value is interpolated on the Corrected Deduct Values table. This number represents the distress index for the sample.

Pavement Reports

Pavement reports provide very detailed information about the pavement attributes, Location data, and inspection information.

Pavement Current PCI Details Report

The report provides information about the current PCI details of a pavement or pavement area sample:

  • Asset attribute information.
  • Current inspection data information.
  • Current PCI value of the pavement or pavement area.
  • Sample data for the pavement or pavement area.

Use this report to review the current details of the pavement/pavement area samples.

The report displays:

  • The samples assigned to the pavement or pavement area.
  • The From and To distance of each sample.
  • Distresses recorded to the specific sample.
  • Extent and Severity of each distress that applies to that sample.

Run this report from:

  • Report view for all of pavement or pavement area records.
  • Detail view of the pavement or pavement area record for a specific pavement or pavement area record.
  • Index view to select multiple records to include in the report.

This feature requires a Cartegraph OMS license.

Pavement Estimated OCI by Street Report

The report provides information about the Estimated OCI by street:

  • Street names
  • Pavement or Pavement Area ID to the street name
  • Length and width of the Pavement or Pavement Area ID
  • Total area of the Pavement or Pavement Area ID
  • Estimated OCR on the Pavement or Pavement Area ID
  • Estimated OCI of the Pavement or Pavement Area ID
  • Pavement or Pavement Area count for the Street Name
  • Average OCI for all Pavement or Pavement Area IDs assigned to a Street Name

Use this report to review the estimated OCI by street. This report displays:

  • The pavement or pavement area records count found on each street.       
  • Pavement or Pavement Area details such as: Pavement or Pavement Area ID, Length, Width, and Total Area grouped by Street Name.
  • Estimated Rating and OCI.
  • The overall average OCI for a specific street.

Run this report from:

Report View

Pavement Estimated OCI Pavement Classification Report

The report provides information about the Estimated OCI on a Pavement Classification:

  • All pavement classifications.
  • The total number of assets assigned to that Pavement Classification
  • The estimated average OCI of the Individual Pavement Classification.
  • Estimated network average OCI.

Use this report to review the estimated OCI pavement class.  This report displays:

  • Number of pavement assets assigned to each pavement classification.
  • Estimated average OCI of each Pavement Classification.
  • Overall network estimated average OCI of the Pavement record.

Run this report from:

Report View

 

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