appearance appreciate appreciating appreciations blue communicating communication expressing expression eye-catching indication information informative informing lettering letters notification notifying out-of-the-blue sign signs thanking thanks unexpected wording words arab arabic cutout isolated roadsign roadsigns warning Antiques paint trim unique wood copyspace decay decaying dystopian old rectangle signage cats eyes humor humour metal red road ban danger prohibition staff only trespassers zoo funny geology joke plate tectonics graphic mobile phone phone rules sound vector authorised restricted risk caution electric electrical