sentences:  It is reachable from the Lines 1, 2, 3, and 4 reaching the Helsfyr station of the Oslo T-bane metro system, and additionally via two bus lines as well as substantial parking for automobiles.As a concert venue Valle Hovin can hold at least 40,000 people, many of whom stand on the concrete floor where the rink is laid in winter.Many internationally famous popular music acts have appeared there, the first one being Tina Turner on 20 June 1987.