AB4Rail | Alternative Bearers for Rail 01-01-2021 - 31-12-2022 Show more information EU-Programme-Call Horizon 2020 H2020-EU.3. SOCIETAL CHALLENGES H2020-EU.3.4. SOCIETAL CHALLENGES - Smart, Green And Integrated Transport H2020-EU.3.4.0. Cross-cutting call topics H2020-S2RJU-OC-2020 S2R-OC-IP2-02-2020 Study on alternative bearers and on communication protocols