banned course deviate digress drift drift away illegal mountains no sidetrack no sidetracking path prohibited prohibition road roadsign roadsigns sidetrack sidetracking sign signs step steps street trail access advice availability communicating communication convenience direction information informative informing ladies-and-gents loo personal public public-convenience public-toilet rest-rooms sanitation toilet toilets wc alert announcement beware blue camera cctv lookout notice observation observe safety security surveillance under-observation video warning warning-sign watch watched white be-careful black turn-back yellow appropriate behavior appropriate behaviour cigarettes environment health health risk no smoking no smoking sign not allowed not permitted penalties permission denied pollution unhealthy bolt cobweb spider's-web web appropriate-behavior appropriate-behaviour care cars caution communicate denied law legal no-standing not-allowed not-permitted park permission-denied red refusal restricted restriction restrictions risk risks risky road-safety road-side sky unacceptable vehicles verge