advice advising alert announcement appropriate-behavior appropriate-behaviour be-careful black blue care cars caution communicating communication concern danger dangerous directions hazard hazardous information informing motorcars orange red risk risks risky road-sign roadwork safety sign signage slow slow-down symbol traffic vehicles warning warning-sign white words work workers workmen avoid barricade barrier build color cone construct construction direction drive equipment forbidden highway line marker marking object obstacle orientation pavement plastic reflective repair road roadworks security signal site speed stop street striped stripes transportation travel under construction urban way beware careful cautious conditions Look looking lookout observant road-conditions signs slippage slippery speed-reduction watch watch-out wet yellow aged aging crossing elderly old pedestrians seniors street-sign traffic-flow walk walkers walking activity beach churned-up colors colours conservation conserving curved curving damage damaged damaging environment environmentally-unfriendly foot-prints grainy gray grey impressed impressions imprinted imprints indented light marked marks off-road-driving over-printed patterns prints rough sand soft-sand surface surfaced surfaces tangled terrain texture textured textures tire-tracks track tracks tyre-tracks vehicle-tracks wild car corner distorted driver mirror reflection vehicle chains fire hydrant prevention pump accident fall hexagon hill hillside lichen mesh metal net netting pattern prevent rock rockfall secure wire