The KCS (Kilometric Charging System) has a network lenght of 2 250 km and it's a free-flow system.
HOW TO PAY TOLLS IN BELGIUM
All the trucks with a gross vehicle weight over 3,5 t have to pay the toll with the KCS OBU (Satellic). You will avoid potential fines of 1000€.
With VIALTIS, the KCS OBU is always linked to the VIALTIS Tolls card which has been registered with the same plate number
NEW TELEPASS SAT
Pay tolls in France, Spain, Portugal, Italy, Austria, Poland and KCS System in Belgium with only 1 device: VIALTIS Telepass SAT.
With its GNSS technology all the countries you'd need to add could be done remotly: no need to change the device.
More countries will be added in the near future to the TELEPASS SAT device. The European interoperability is coming.