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