In order to assist all riders in selecting safer cycling routes all designated āEā roads in Romania will be prohibited from the race and only selected ferry crossings will be permissible to cross the Danube from Romania to Bulgaria.
So I guess prohibited (and you're only allowed to cross via one of the ferries? that was my interpretation of Frank's comments)
The Burgas checkpoint description has
So I guess prohibited (and you're only allowed to cross via one of the ferries? that was my interpretation of Frank's comments)