advice alert announcement appropriate-behavior appropriate-behaviour be-careful beware black care careful caution communicating communication concern crossing danger dangerous double-lines information informing island lookout observant pedestrians reflective refuge risk risks risky road road-sign safety security share sharing sign signs small-traffic-island traffic traffic-flow traffic-island walk walkers walking warning warning-sign watch watch-out yellow beach british clock coast coastline display flowers harbor harbour historic holiday holiday resort pier relaxation resort sand scenic sea traffic island