Via-T is a post-payment ETC system. Motorists only use one OBU to drive through the whole Spanish Network. This interoperable ETC system has resulted in a greater number of motorists using Spanish toll roads. In addition to this, prices for the OBU units have dropped, because VIA-T is the first multi-vendor system where currently six different ETC manufacturers are potential suppliers. The VIA-T can easily be implemented in other countries. Recently, Spain has been focusing on extending the VIA-T service to Portugal and France.