NS TRAIN SERVICES AND STATIONS
ALPHEN A/D RIJN
On the line from Woerden to Leiden. Immediately east of the station, a branch line diverges south to Gouda. Both lines are single track, trains between Woerden and Leiden normally use Track 2 in both directions. Trains to and from Gouda normally terminate on Track 3, but during rush hours those trains are extended west to Leiden, also using Track 3.
Mapping the Station and Lines
Zoomable Google Maps show station tracks, track numbers, and rail routes radiating away.
Typical Rail Services/Normal Track Assignments
Track numbers where the regular NS services normally depart the station.
3 Alphen a/d Rijn-Gouda
Alphen a/d Rijn Station
Wikipedia link containing further station information and history.