1 Data Collection Tiers

Data Collection Tiers / Oregon DOT

  • Tier 1: Assets with high replacement values and substantial potential cost savings from life cycle management (e.g. pavements and bridges)
  • Tier 2: Assets that must be inventoried and assessed to meet legal obligations (e.g. ADA ramps, stormwater management features)
  • Tier 3: Assets with high to moderate likelihood and consequences of failure (e.g. traffic signals, unstable slopes, high mast lighting, sign structures)
  • Tier 4: Other assets that would benefit from a managed approach to budgeting and work planning (e.g roadside signs, pipes and drains)

Read more in the chapter: 7.2.1 Deciding What Data to Collect