 Currently, it includes the tunnel and an elevated viaduct to the east, which includes a branch line for RandstadRail trams that connects to the former Hofpleinlijn near Den Haag Laan van NOI railway station.Trams on RandstadRail lines 3 and 4 use this connecting line.East of Laan van NOI they share tracks and stations with Rotterdam Metro line E trains as far as Leidschendam-Voorburg before diverting onto the former Zoetermeer Stadslijn towards Zoetermeer.