Vestviken Kollektivtrafikk (VKT) (lit. Vestviken Public Transport) is the public transport administration for the county of Vestfold in Norway, formerly also Buskerud and Telemark. VKT is responsible for planning, organising and marketing bus transport in the county, but does not operate any buses. Instead the operation is done by private companies based on public service obligation contracts or negotiations. VKT is organised as a limited company owned by the three county administrations. The administration is located in Tønsberg.