Definition: Average length of line operated throughout the year
The length of line used for traffic throughout the reported year (including lines operated jointly with other railway enterprises) plus the average length of lines opened or closed during the year (weighted by the number of days they have been operated).
Note: The total length of line operated is the length operated for passenger or goods transport, or both. When a line is operated simultaneously by several enterprises it will be counted only once.
Glossary For Transport Statistics, Eurostat, ECMT, UN/ECE, Second edition