According to UN data, some 3 million refugees have now fled Ukraine in the three weeks since the Russian invasion. As the war continues its tragic devastation, the need for humanitarian relief for Ukrainians both inside and outside the country is rising. The Community of European Railway and Infrastructure Companies (CER) is working closely with its members to track the rapidly evolving transport situation on the ground. Two fronts remain crucial: ensuring onward flow of refugees towards safe havens beyond the border regions and helping with the supply of aid into Ukraine. (....)