Related Clues:

• Ramp sign in red
• Go after switching neon sign
• Admittance prohibited!
• Property border warning
• Peek, perhaps, but don't go in
• 'Stay out'
• Private land sign
• No entry!
• Gas is about — go, and keep out
• Expression of alarm turning up at fish bar
• Don't trespass
• Attempt to follow rotating neon street sign
• Attempt to follow reflective fluorescent road sign
• Sign of an unsuccessful solver?
• Unsuccessful competitor's situation, perhaps way to go ahead is barred