The EU already has a project to introduce a replacement for the screw couplings used in EU rail freight today, the Digital automatic coupling (DAC). The "digita

The EU already has a project to introduce a replacement for the screw couplings used in EU rail freight today, the Digital automatic coupling (DAC). The "digital" part AFAICT comes from the ability to also connect air (for pneumatic brakes) and data cablings, not only mechanical.