city crosswalk pedestrian pictogram sign urban walk hand crossing crossover public road safety street zebra background blind braille bumps feel San Francisco sidewalk surface tactile texture warn warning yellow bicycle bike child cycle man pole round signpost sky steel sundtraffic two walking white zebracrossing allow allowed blue decree signs traffic aliens avenue civilization crosspoint europe flow germany green green man hamburg lights martian order semaphore streetlights traffic ligths zebra line asphalt Big X car park copy space copyspace letter paint parking parking lot type typography x adult attention beware care careful caution close closeup cross drive education environmental icon info information isolated orange passage path people roadsign safe signage signal slow stop symbol transport transportation way zone abstract across backgrounds black citylife citystreet clean concrete crossshape day diagonal direction dirty driveway footpath grained gray highway inarow material pattern rough simplicity stmark striped surfacelevel tar textured texturedeffect town urbanscene vanishingpoint vertical