SAA- JA KELIETOON PERUSTUVAN LIIKENTEEN OHJAUSJARJESTELMAN VAIKUTUKSET YKSIAJORATAISELLA OSUUDELLA VALTATIELLA 7 [EFFECTS OF THE WEATHER- CONTROLLED TRAFFIC MANAGEMENT SYSTEM ON SINGLE-CARRIAGEWAY ROAD SECTION OF HIGHWAY E18, FINLAND]

This study describes the development of a variable speed limit system which is controlled by weather and road condition data. The system works in parallel with seasonally changing speed limits. The study focuses on investigating the effects of the variable speed limit and messages signs on three different types of roads.