alert announcement be careful beware brown car care careful cars caution communicating communication danger drivers informing lookout observant observe pedestrians safety security sign vehicles warning watch watch out white be-careful black red advice appropriate-behavior appropriate-behaviour concern crossing dangerous information risk risks risky road road-sign share sharing signs speed-reduction stop street-sign traffic traffic-flow walk walkers walking warning-sign watch-out yellow blocked blocked-path detour directing direction go-around allowed canine clean-up consideration control controlled denial denied directions dog dogs exception guidelines lead leash permission-granted pets purple rules track welcome double-lines island reflective refuge small-traffic-island traffic-island cautionary cautionary-entrance-tape cautionary-tape Dirt discarded fallen ground plastic tape alternative-way arrow discoloration message wording words baffle gate bags closed covered entrance exit faregate gate gates hooded hoods mass transit stations mass transit turnstiles movement control not used one-way people traffic passenger control passenger movement passengers pedestrian control railway station sealed turnstile turnstiles waist-high turnstiles adult attention background city close closeup cross crosswalk drive education environmental icon info isolated man orange passage path pedestrian people public roadsign safe signage signal slow street symbol transport transportation urban way zone abstract across asphalt backgrounds citylife citystreet clean concrete crossshape day diagonal dirty driveway footpath grained gray highway inarow material paint pattern rough sidewalk simplicity stmark striped surfacelevel tar textured texturedeffect town urbanscene vanishingpoint vertical zebra zebracrossing