It consist of a single track alongside the mainline railway, from Houten NS Station 2 km due south to a new halt at Houten Castellum, without intermediate stops. Track and overhead is to NS heavy rail standards. Operational management is by NS, with railway ticketing only. Staff stated that other tramcars were being rebuilt to 1500V DC, so as to utilise the standard NS overhead voltage. Special fares are charged and the concept may be extended to other overnight services from the Netherlands.
Extensive works are under way or recently completed to increase line capacity.
These include realignment and quadrupling of lines and construction of flyovers at junctions. The Hemboog line, under construction, will provide a direct connection between the Zaandam and Schiphol lines near Amsterdam Sloterdijk. This is due to open in 2003. A high speed line is being built from Antwerpen to Amsterdam, to link with the French and Belgian high speed network. The Betuwe line is a trunk freight railway under construction from Rotterdam to Emmerich.