alert background barricade barrier caution color cone construct construction danger design direction drive equipment forbidden highway isolated line marker marking object obstacle orange pavement plastic red reflective repair road safety security sign signal site speed stop street striped stripes symbol traffic transportation travel under warning white work cutout adult attention beware care careful city close closeup cross crosswalk education environmental icon info information man passage path pedestrian people public roadsign safe signage slow transport urban walk way yellow zone area away black blue breaking building car fire illegal lane law message metal no not park parking pictogram prohibited prohibition ticket tow tow-away trees truck violation wall abstract bumps coloured Dirt floor grunge health non non-skid non-slip occupational outdoor outside pad pads pathway pattern pavers paving prevent prevention rubber shape shiny sidewalk skid slip slipping stone surface texture traction used walkway advice announcement appropriate-behavior appropriate-behaviour be-careful cars communicating communication concern crossing dangerous directions informing listen Look looking lookout observant rails railway railway-crossing risk risks signs trains warning-sign watch watch-out access accessibility allocated allocation approved arrow conditional conditions directing directional disability disabled fee-free free handicapped indication indicator no-fee symbols wheelchair word angle angles appearance barbed-wire barbs cautionary-tape deteriorating double fence fencing gray grey light old plastic-tape protect protection protective razor-wire restraint rust rusting rusty secure security-fence sharp silvery spirals strands tape textures twists wire behave behavior behaviour birds communicate ducks fatal feed feeding food inform no-bread not-allowed not-permitted permission-denied restricted restriction restrictions water-birds watrer-fowl ahead colorful coloring colors colourful colouring colours curve curves curvy difficult driving hazard irregular irregularity journey outdoors risky roadway slow-down turn turning turns winding large-vehicles limitations limited reversal reversing trucks vehicles