 The work stretched over a segment of 1 @.@ 2 kilometers ( 0 @.@ 75 mi ) of line . Construction started in February 2006 with work on expanding Granfoss Bridge , both lengthening it and building one parallel to it to allow four tracks . From May work commenced on the first new platform , which was completed in February 2007 and all traffic moved to the new tracks and platform . Then the old platform was demolished and a second new platform built , which was completed in 2009 . The work took 776 @,@ 000 man @-@ hours and cost NOK 1 @.@ 2 billion . The station was taken into use on 22 August 2009 , although the official opening of the new station took place on 1 September 2009 . The Bærum Tunnel opened on 26 August 2011 . To allow more trains to terminate at Lysaker , a suitable place to turn trains needed to be built . Høvik Station was chosen and received three new tracks . With its completion on 14 December 2014 all trains previously terminating at Skøyen were extended to Lysaker . 
