Data Required for Implementation

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Data Required for Implementation

All life cycle management approaches need inventory and performance information, but the extent, detail, accuracy, and precision of the required information varies greatly given the chosen approach.

Assets that are managed using a condition-based approach rely on detailed inventory and performance information so that current and future conditions can be estimated, and the benefits and costs associated with each viable strategy can be evaluated. Interval-, time-based, and reactive approaches can be performed with less detailed information about the assets. Agencies using these approaches may estimate the size and age of the inventory at early levels of maturity. Over time, the type of information available and the level of detail associated with it may improve, allowing the agency to mature in terms of its analysis capabilities.

Table 4.3 provides examples of typical management strategies for common highway asset classes and the types of information used to support each one. The information in table 4.3 reflects general trends in transportation agencies. In practice, each agency must identify the specific elements and data requirements needed to support their needs within resource constraints. Chapter 7 addresses methods of collecting information efficiently (see table 7-3) and Chapter 6 stresses the importance of keeping inventory and performance data current. Establishing data governance structures to manage asset data is also an important consideration, as discussed in Chapter 7.

Table 4.3 - Typical Maintenance Strategies and Supporting Data

Asset TypeTypical Maintenance StrategyTypical Information Collected and Used
PavementsPredictive, condition-based maintenance
  • Linear referencing system
  • Segmentation with unique IDs
  • Inventory (e.g., width, pavement type, and other identifying attributes)
  • Condition data (e.g., ride quality cracking, rutting, faulting, and others)
  • Deterioration models
  • Available treatments
  • Treatment unit costs
BridgesPredictive, condition-based maintenance
  • National Bridge Inventory Data (NBI)
  • National Bridge Element Condition (NBE) Data
  • Vulnerabilities (e.g., scour, seismic, flood)
  • Deterioration Curves
  • Treatment options
  • Unit costs
Overhead Sign StructuresMonitoring-based or Interval-based maintenance
  • Inventory Data, modeled after NBI
  • Element level condition data, modeled after NBE
  • Design life
  • Structural specification (e.g., proper bolt torque)
ITS AssetsInterval-based maintenance
  • Location
  • Asset ID
  • Inventory data to identify type or class
  • Install date
  • Manufacturer recommended service life
GuardrailsReactive maintenance
  • Location
  • Type
  • Functional requirements
Source: FHWA. Handbook for Including Ancillary Assets in Transportation Asset Management Programs. 2019. Prioritizing Assets for Inclusion in Transportation Asset Management (TAM) Programs.