Belgium Public Transport
Eurostar – excellent services. Trains go to France, the Netherlands and the United Kingdom. Via this link you can read all you need to know, even about connecting to other trains in other countries.
Any station via Brussels (Brussels Midi and Brussels) and 8 other cities.
Bus / Metro
If you drive yourself, use the Fuelservice app (click to find stations) to communicate with fuel stations so you can smoothly continue your roadtrip.