arrow blue bright direction indication one way only direction pointing pointing back sign traffic traffic flow traffic sign white black black on white law no alternative one way signs only signs specific street signs arrows communicating communication directional divergent diverging no-alternative pointer splitting splitting-up street-sign traffic-flow traffic-sign turn turning two-way black-on-white gray grey left-turn reflective vehicles vehicular wording one-way one-way-signs acceptable advice advising allocated allocation appropriate-behavior appropriate-behaviour approved carpark directing directive indicator information informing limited limited-parking parking restricted restrictions special-parking staff staff-only staff-parking word access-limited alert authorised-entry-only authorized-entry-only boots care caution clothing concern construction-site danger dangerous directions eye-protection feet footwear helmets injury limited-access peotective-equipment protect protection protective red restriction risk risks risky safety unauthorised unauthorized visibility warning warning-sign workers workmen access denied alternative denied no standing no temporary parking not allowed not permitted permission denied prohibited prohibition access-denied authorised authorized behave communicate entry-denied entry-prohibited guests insiders message no-access no-entry no-outsiders not-allowed not-permitted outsiders permission-denied private private-property signage unacceptable vistors words ban banned be-careful beware bicycles-prohibited bylaws cycling-prohibited legal no-bikes no-cycling no-wheels pedestrian-care pedestrian-safety prohibitions rules symbol watch watch-out