Zoetermeer Stadslijn

The light-rail connection, combined with The Hague-Rotterdam line, is called the RandstadRail.

After the Oosterheem neighbourhood was built in Zoetermeer, an extra track was added.

It does not take the round line, unlike the other routes, but splits between Seghweart and Leidsewallen stations.

At Centrum West, it turns and circles back over the whole track to Den Haag Centraal Station.

The route starts at Den Haag, passes through Voorburg and Leidschendam, and continues through Den Haag Leidschenveen, at the following stops: Then, it enters Zoetermeer at station Voorweg Laag.