beware danger digger drive excavator road safety security sign street traffic travel vehicle warning yellow animal sheep 30 direction limit number red speed limit thirty village white car highlands narrow passing place scotland signpost single track winter ahead block blockage blocked construction constructions cutout detour diversion isolated lamps lights platform roadsign roadsigns signs trailer turn works caution crossroads give give way junction post right turn right way 3D abstract arrow bad black choice decision failure Good Rendered split success cars go signal signs full stop stop Stop light advice alert announcement appropriate-behavior appropriate-behaviour be-careful care careful communicating communication concern dangerous directional directions informing lanes left lefthand-lane Look looking lookout message observant risk risks road-rules traffic-flow vehicles watch watch-out cautious conditions road-conditions road-risks rural slippage slippery slow slow-down speed speed-reduction tractor tractors warning-sign