Illustration: Warning Of Light Signals At A Level Crossing With Barrier Or Gat

KEYWORDS

advance advise ahead alert alertness applies attention banned barrier care careful caution cautious command communication compulsory control crossing danger dangerous design direction forbidden gate graphic halt hazard hazardous illegal illustration importance inform information instruct instruction level light lights mandatory notice obligation obligatory observations order prohibited regulation regulations required requirement road route safe safety sign signals signs stop symbol symbols traffic train trains tram trams transport transportation triangle vector vigilance vigilant warn warning