Lauttasaari bus routes 20, 21 and 21B will not run on Saturday 12 January and Sunday 13 January. The buses will be replaced by buses 20X and 21X running from Vattuniemi and Katajaharju directly to the Kamppi bus terminal. Bus 20X will run from Kamppi via Lauttasaari Metro Station to Katajaharju and bus 21X from Kamppi via Lauttasaari Metro Station to Vattuniemi. Itämerenkatu, Hietalahdenranta, Bulevardi, Albertinkatu/Fredrikinkatu and Laivurinkatu will not be served, i.e. the buses will not run e.g. via Ruoholahti Metro Station, instead, they will run along Porkkalankatu. From Eira, journeys can be made by regular bus routes to Kamppi, where passengers can change to buses going to Ruoholahti and Lauttasaari. The changes are due to the disruption to the metro services caused by the installation of a new interlocking.