On semi-metro routes, tram vehicles run in tunnels and/or on viaducts in the city centre and otherwise largely on free tracks.

As long as the conversion of the tram network to metro standards has not been completed, it is called semi-metro.

The elevated viaduct includes a branch line for RandstadRail trams that connects to the former Hofpleinlijn near Den Haag Laan van NOI railway station.

This system Automatische Rem Installatie or ARI (Automatic Brake Installation), will stop a tram when it is travelling faster than the speed indicated by the signals.

[9] As of 2024, the fleet consists of approximately 200 trams of three types: Media related to The Hague semi-metro at Wikimedia Commons