Tieosuus

Tieosuus (Finnish for road section) is a term used in Finnish road administration to describe a continuous stretch of road that is treated as a single maintenance and management unit. A tieosuus is defined by start and end points, which are typically at intersections, road junctions, changes in road category, or administrative boundaries. The length of a tieosuus is measured in kilometers and can vary widely.

The concept serves several practical purposes: planning and coordinating maintenance and improvements, recording asset data, and collecting traffic and road condition statistics. Tieosuudet are used in budgeting and procurement processes for road works and are referenced in design specifications and inventory systems. Each tieosuus is assigned a unique identifier within the national or local road administration databases, along with attributes such as road category, surface type, speed limit, and traffic volumes.

In practice, the tieosuus framework enables authorities to analyze performance, plan interventions, and monitor changes over time on the road network. It applies to both state (national) roads and municipal or local roads, though the exact governance and data systems may differ between jurisdictions.