Definition: Twilight (or unknown)

Category: Transport

As reported by the police or other authorities.

A residual category covering cases where daylight conditions were very poor or where no information on light conditions was available.

This definition is identical in the third and fourth version of the Transport Glossary. http://ec.europa.eu/eurostat/ramon/other_documents/transport_glossary_4_ed/index.cfm?TargetUrl=DSP_TRANSPORT_GLOSSARY_4_ED Eurostat, ECMT, UN/ECE, "Glossary for Transport Statistics", 3rd Edition, Luxembourg 2003