@arminb's question: Can we use the "EU citizen only" lane when travelling by car with one non-EU passenger inside?
asks whether a non-EU citizen spouse (in this case, @arminb himself) can use the "EU citizen only" lane when travelling with his wife and children (who are all EU citizens).
@Relaxed explains that "Yes, @arminb can use the EU/EEA/CH citizen lane by virtue of the fact that he is a family member of an EU citizen (in this particular case, his wife, although Directive 2004/38/EC explains that there are other family members that this applies to - it's not just husbands and wives).
My question is: can @arminb use the EU/EEA/CH citizen lane even if he is travelling alone i.e. can a single non-EU citizen travelling alone use the EU/EEA/CH citizen lane if they are, according to Directive 2004/38/EC, a family member of an EU citizen?